سنسنجی، پترولوژي، ژئوشیمی و تکتونوماگماتیسم سنگهاي حدواسط و مافیک کمپلکس پلوتونیک برنورد (شمالغرب بردسکن)

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ﻦﯿﻣز يدﺎﺼﺘﻗا ﯽﺳﺎﻨﺷ ﺪﻠﺟ 10 هرﺎﻤﺷ ، 2 لﺎﺳ) 1397 ( تﺎﺤﻔﺻ 39 و 40 Journal of Economic Geology

Vol. 10, No. 2 (2018-2019) ISSN 2008-7306

Geochronology, Petrology and Geochemistry of Intermediate and Mafic Rocks

of Bornaward Plutonic Complex (Northwest Bardaskan, Iran)

Reza Monazzami Bagherzadeh1, Mohammad Hassan Karimpour1&2*, G. Lang Farmer3, Charles R. Stern3, Jose Francisco Santos4, Sara Ribeiro4, Behnam Rahimi1&2 and Mohammad Reza Haidarian

Shahri1

1) Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran 2) Research Center for Ore Deposit of Eastern Iran, Ferdowsi University of Mashhad, Mashhad, Iran

3) Department of Geological Sciences, University of Colorado, Boulder, U.S.A. 4) Department of Geosciences, University of Aveiro, Aveiro, Portugal

Submitted: Aug. 8, 2017 Accepted: Nov. 26, 2017

Keywords: Complex, Zircon geochronology, microcontinent, Bornaward, Taknar

Introduction

The study area is located in the northeast of Iran (the Khorasan Razavi province) and 28 km northwest of Bardaskan city and in position of 57˚ 46΄ to 57˚ 52΄ latitude and 35˚ 21΄ to 35˚ 24΄ longitude. The study area is a part of Taknar zone. The Taknar geological-structural zone is situated in the north Central Iranian microcontinental and it is a part of Lut block (Fig.1). Taknar plutonic complex that is situated in the Taknar structural zone is located in the northern part of Iranian microcontinent.

Materials and methods

Chemical analysis of REE and minor elements of samples of the Bornaward diorites and gabbro’s took place in the ACME Lab. in Vancouver, Canada, by the ICP-MS method (Table. 1). For the Bornaward diorite dating by the U-Pb method, zircon grains of material remaining in the sieve, Bromoform were isolated from light minerals by cleaning and were isolated with a minimum size of 25 microns, and then studies took place in the Crohn's Laser Lab Arizona (Gehrels et al., 2008). Measurement of Rb, Sr, Sm and Nd isotopes and (143Nd/144Nd)i , (87Sr/86Sr)i ratios and ƐNd

(T=552), ƐNd (T=0), ƐSr (T=552) and ƐSr (T=0)

took place in radioisotope Laboratory, University of Aveiro in Portugal.

Discussion

Geology of study area

The study area forms the central part of the Bornaward plutonic complex. This complex is a granitoid assemblage including granite, granodiorite, tonalite and granophyre.tscentral part has been formed by intermediate and basic intrusive rocks such as diorite, quartz diorite and gabbro units (Fig. 2). From the genetic point of view, the intermediate and mafic rocks of the Taknar plutonic complex does not have any relationship with granitoid rocks of this assemblage, and they are related to a similar magmatic phase but are separated from this granitoid assemblage. However, these mafic and intermediate units are older than granitic units at the rim of the complex that are called Bornaward granite.

Petrography

The main minerals in the diorite and quartz diorite rocks are plagioclase and hornblende and we can see biotite in the quartz dioritic rocks. Quartz exist as tiny grains and anhedral and in the matrix rock. The amount of Quartz in the quartz diorites is 5 to 20%. Plagioclases usually have normal zoning and are highly altered to sericite. Most of the plagioclases were saussuritized. Altered minerals resulted from plagioclase and hornblende are sericite, epidote, chlorite, zoisite and clinozoisite.

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Journal of Economic Geology Monazzami Bagherzadeh et al. 40

The main minerals in the gabbro are pyroxene, hornblende, and fine grains plagioclase. Minor minerals in the rocks are apatite, magnetite and other opaque.

The main texture of intermediate and mafic rocks in this assemblage is medium granular to coarse grain and especially in the intermediate rocks and gabbro rocks, we can see scattered poikilitic, intersertal, sub-ophitic and porphyroid texture.

Geochemistry

The area diorite and gabbro is located locate in Tholeiitic and Calc-alkaline series (Fig. 9). Shand index (Al2O3/(CaO+Na2O+K2O)) is obtained

under 1.1, in Metaluminous field (Fig. 7) and I-type granite field (Chappell and White, 2001). Based on the TAS diagram (Middlemost, 1985), all the diorite and gabbro samples are located in diorite, gabbro-diorite and gabbro-norite groups (Fig. 6). The diorite and gabbro’s show enrichment LREE and low ascending pattern ((La/Yb)N =1.40-6.12 and LaN =12.26-75.81).

U-Pb zircon geochronology

Measurement of U-Th-Pb isotopes of the Bornaward diorite zircons of BKCh-03 sample (Table 2) show that its age is related to 551.96±4.32 Ma ago (Upper Precambrian (Neoproterozoic) (Ediacaran) (Fig. 14).

Sr-Nd isotopes

The (87Sr/86Sr)i and (143Nd/144Nd)i content of

Bornaward diorite and gabbro rocks is located in the range of 0.7038 to 0.7135 and 0.51203 to 0.51214, respectively (Tables 3 and 4). It shows that the diorite and gabbro rocks can be affected by hydrothermal alteration because their (87Sr/86Sr)i is above (Fig. 16). The numeral

amounts of ƐNd_(T=552)of Bornaward diorite and

gabbro are 2.0 to 4.0.

Petrogenesis

The Bornaward diorite and gabbro rocks show a widespread enriched pattern of Rb, U, K, Pb, La and Th elements than chondrite, while Ba, Ti, Ta, Sr and Nb elements show reduction as a result of fractional crystallization (Fig. 11). The rocks of this complex are formed at the continental margin and VAG environment (Fig. 18) which is related

to the subduction of the oceanic crust that exists between the Iranian microcontinent and the Afghan Block.

Results

This assemblage with age of Late Neoproterozoic is the result of extensive magmatism in the northern part of the Iranian microcontinent due to Katangahi orogeny event. The similar magmatism in the northern part of the Iranian microcontinent is existing as Khaf-Kashmar-Bardeskan volcano-plutonic belt.

Based on the geochemical investigations, the magmatism of these rocks has been tholeiitic and calk-alkaline and have formed the coexistent rocks with I-type granites. Alumina saturation index for intermediate and mafic rocks of Bornaward complex is metalumina. These are medium-K rocks and enriched in the LILE such as Rb, Pb, U and Th while depleted of the Nb, Ti, Ta, Sr and Ba. Therefore, it shows that these rocks have resulted from the mixing by the lower crust. The low (87_Sr/86_Sr)

i Bornaward diorite and gabbro

rocks and the numeral amounts of Ɛ0Nd(present) of

these rocks from -0.2 to 4.0 show that production of such intrusive masses can be attributed to the source of upper mantle or contaminated lower continental crust. Environment of formation of the intermediate and basic rocks of the Bornaward plutonic complex is active continental margin and volcanic arc environment.

References

Chappell, B.W. and White, A.J.R., 2001. Two contrasting granite types: 25 years later. Australian Journal of Earth Sciences, 48(4): 489–499.

Gehrels, G.E., Valencia, V.A. and Ruiz, J., 2008. Enhanced precision, accuracy, efficiency, and spatial resolution of U–Pb ages by laser ablation– multicollector– inductively coupled plasma-mass spectrometry. Geochemistry, Geophysics, Geosystems, 9(3): 1–13.

Middlemost, E.A.K., 1985. Magmas and Magmatic Rocks. An Introduction to Igneous Petrology. Longman, London, New York, 266 pp.

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karimpur@um.ac.ir :تﺎﺒﺗﺎﮑﻣلﻮﺌﺴﻣ* DOI: 10.22067/econg.v10i2.66703 ﻦﯿﻣز يدﺎﺼﺘﻗا ﯽﺳﺎﻨﺷ ﺪﻠﺟ 10 هرﺎﻤﺷ ، 2 لﺎﺳ) 1397 ( تﺎﺤﻔﺻ 425 ﺎﺗ 448 Journal of Economic Geology

Vol. 10, No. 2 (2018–2019) ISSN 2008-7306

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هﺪﯿﮑﭼ ﮏﯿﻧﻮﺗﻮﻠﭘ ﺲﮑﻠﭙﻤﮐ درﻮﻧﺮﺑ رد و يﺰـﮐﺮﻣ ناﺮـﯾا هرﺎـﻗ دﺮـﺧ لﺎﻤـﺷ رد ،رﺎـﻨﮑﺗ يرﺎﺘﺧﺎـﺳ نوز رد ﻊﻗاو 20 لﺎﻤـﺷ يﺮﺘﻣﻮـﻠﯿﮐ بﺮـﻏ نﺎﺘـﺳﺮﻬﺷ ﺮﺧاوا لدﺎﻌﻣ ﯽﻨﺳ ﺎﺑ ﻪﻋﻮﻤﺠﻣ ﻦﯾا .دراد راﺮﻗ ﻦﮑﺳدﺮﺑ (ﮏﯿﺋوزوﺮﺗوﺮﭘﻮﺌﻧ) ﻦﯾﺮﺒﻣﺎﮐﺮﭘ ـﺳو ﯽﯾﺎـﻤﮔﺎﻣ ﺖـﯿﻟﺎﻌﻓ ﻪﺠﯿﺘﻧ ، ناﺮـﯾا هرﺎـﻗ دﺮـﺧ لﺎﻤـﺷ ﻊﯿ هﺪﯾﺪﭘ ﺮﺛا رد يﺰﮐﺮﻣ هﻮﮐ ﯽﯾاز ﯽﻫﺎﮕﻧﺎﺗﺎﮐ ﻪﺑ يﺰﮐﺮﻣ ناﺮﯾا هرﺎﻗ دﺮﺧ لﺎﻤﺷ رد ﻢﺴﯿﺗﺎﻤﮔﺎﻣ ﻦﯾا ﻪﺑﺎﺸﻣ .ﺖﺳا ﻮﻧﺎﮑﻟو ﺪﻨﺑﺮﻤﮐ ترﻮﺻ ﮏﯿﻧﻮﺗﻮﻠﭘ فاﻮﺧ -ﺮﻤﺷﺎﮐ -گرﺰﺑ ﺲﮑﻠﭙﻤﮐ ﻦﯾا .دراد دﻮﺟو ﺮﻤﺷﺎﮐ يﺎﻫﺪﯿﺋﻮﺘﯿﻧاﺮﮔ نﻮﭽﻤﻫ ﻦﮑﺳدﺮﺑ ﻪـﻋﻮﻤﺠﻣ ﻊﻗاو رد سﺎﯿﻘﻣ يا يﺪـﯿﺋﻮﺘﯿﻧاﺮﮔ ﻞﻣﺎـﺷ ﮓﻨﺳ ـﺘﯿﻧاﺮﮔ يﺎﻫ ﯽ ﺘﯾرﻮـﯾدﻮﻧاﺮﮔ ، ﯽ ﺘﯿﻟﺎـﻧﻮﺗ ، ﯽ ﺮﯿﻓﻮـﻧاﺮﮔ و ي ﻪـﮐ ﺖـﺳا ﺶـﺨﺑ يﺰـﮐﺮﻣ زا نآ ﮏـﯾ هوﺮـﮔ يﺎﻫﺪـﺣاو ،ﯽﯾوﺮﺑﺎـﮔ ﯽﺘﯾرﻮـﯾد و ﯽﺘﯾرﻮﯾدﺰﺗراﻮﮐ ﻞﯿﮑﺸﺗ هﺪﺷ ﯽﻠﺻا ﺖﻓﺎﺑ .ﺖﺳا ﻦﯾا ﮓﻨـﺳ ﮏـﯿﻓﺎﻣ و ﻂـﺳاوﺪﺣ يﺎـﻫ ، ﺖـﺷرد ﺎـﺗ ﻂـﺳﻮﺘﻣ رﻻﻮـﻧاﺮﮔ رﻮـﻠﺑ ﺖـﺳا ﺖـﻓﺎﺑ و يﺎـﻫ ﻪﺑ ﺪﯿﺋوﺮﯿﻓرﻮﭘ ﮓﻨﺳ رد هﮋﯾو يﺎﻫ ﺖﻓﺎﺑ و ﻂﺳاوﺪﺣ ﯽﺋﻮﭘ يﺎﻫ بﺎﺳ و ﮏﯿﺘﯿﻠﮐ ﮓﻨـﺳ رد ﮏـﯿﺘﯿﻓا ﻪـﺑ ﯽﯾوﺮﺑﺎـﮔ يﺎـﻫ ﻢـﺸﭼ ﻪـﺑ هﺪـﻨﮐاﺮﭘ ترﻮـﺻ ﯽﻣ ﯽﻧﺎﮐ .درﻮﺧ ﻓ ﯽﻠﺻا ﻦﯾﺰﯿﻨﻣوﺮ راد ﮓﻨﺳ ﻂﺳاوﺪﺣ و ﮏﯿﻓﺎﻣ يﺎﻫ ، ﻪﻧﻮﻤﻧ رد و ﺖﺳا ﺪﻨﻠﺒﻧرﻮﻫ ﯽﻧﺎﮐ ﺰـﯿﻧ ﺖـﯿﺗﻮﯿﺑ ،ﯽﺘﯾرﻮـﯾدﺰﺗراﻮﮐ يﺎﻫ هﺪـﯾد ﯽﻣ دﻮﺷ ﮓﻨﺳ . ﮏﯿﻧﻮﺗﻮﻠﭘ ﺲﮑﻠﭙﻤﮐ ﮏﯿﻓﺎﻣ و ﻂﺳاوﺪﺣ يﺎﻫ ﻧﺮﺑ درﻮ ﮓﻨﺳ ﺎﺑ ﯽﮑﯿﺘﻧژ ظﺎﺤﻟ زا ﻃﺎﺒﺗرا ﻪﻋﻮﻤﺠﻣ ﻦﯾا يﺪﯿﺋﻮﺘﯿﻧاﺮﮔ يﺎﻫ ﯽ ﻢﯿﻘﺘـﺴﻣ ﺪﻧراد ﯽﺳرﺮﺑ و ﯽﯾاﺮﺤﺻ طﺎﺒﺗرا ظﺎﺤﻟ زا . ﯽﻨﺳ يﺎﻫ ﯽﻣ ﺺﺨﺸﻣ ﻦﯿﻨﭼ ﯾا ﻪﮐ دﻮﺷ ﯽـﺘﯿﻧاﺮﮔ ﺪـﺣاو ﻪـﺑ ﺖﺒـﺴﻧ ﻂﺳاوﺪﺣ و ﮏﯿﻓﺎﻣ يﺎﻫﺪﺣاو ﻦ و ﺲﮑﻠﭙﻤﮐ ﻦﯾا يﺪﯿﺳا يذﻮﻔﻧ يﺎﻫﺪﺣاو ﺮﮕﯾد ﯽﻤﯾﺪﻗ ﺪﺣاو ﻦﯾا ﻂﺳﻮﺗ و هدﻮﺑ ﺮﺗ ﺎﻫ ﺷ ﻊﻄﻗ هﺪ .ﺪﻧا سﺎﺳا ﺮﺑ ﻦﺳ ﯽﺠﻨﺳ ﺖﯾرﻮﯾد زا هدﺎﻔﺘﺳا ﺎﺑ درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ يﺎﻫ ز ﯽﻧﺎﮐ ﯾ ﻪﺑ ﻦﮐﺮ شور U-Pb ﻦﺳ ، يذﻮـﻔﻧ يﺎﻫ هدﻮﺗ ﻦﯾا 32 / 4 ± 96 / 551 ﻣ ﯿﻠ ـﯿ نﻮ ﺮﺧاوا) ﻞﺒﻗ لﺎﺳ (ﻦﯾﺮﺒﻣﺎﮐﺮﭘ ﻪﺑ ﺖـﺳا هﺪـﻣآ ﺖـﺳد . ﻪـﯾﺎﭘ ﺮـﺑ ﯽـﺳرﺮﺑ يﺎـﻫ ﮓﻨـﺳ ﻦـﯾا ﯽﯾﺎـﻤﮔﺎﻣ تﻻﻮـﺤﺗ ،ﯽﯾﺎﯿﻤﯿـﺷﻮﺋژ عﻮـﻧ زا ﺎـﻫ و ﯽﺘﯿﺌﻟﻮـﺗ ﮏﻟﺎﮐ ﻦﻟﺎﮑﻟآ هدﻮﺑ ﺧﺎﺷ و ﻦﯿﻣﻮﻟآ زا عﺎﺒﺷا ﺺ ﮓﻨﺳ ﻦﯾا ﺎﻫ .ﺖﺳا ﻦﯿﻣﻮﻟآﺎﺘﻣ ﺖﯾرﻮﯾد درﻮﻧﺮﺑ يﺎﻫوﺮﺑﺎﮔ و ﺎﻫ و هدﻮـﺑ ﻂـﺳﻮﺘﻣ ﻢﯿـﺳﺎﺘﭘ عﻮﻧ زا زا ظﺎﺤﻟ ﯽﮔﮋﯾو يﺎﻫ ﯽﯾﺎﯿﻤﯿﺷﻮﺋژ ﻪﺑ ﺖﺒﺴﻧ ﺮﺻﺎﻨﻋ رﺎﮔزﺎﺳﺎﻧ La, Rb, K, U, Pb ﻪﺑ هاﺮﻤﻫ Th ﯽﻨﻏ ﯽﻣ نﺎﺸﻧ ﯽﮔﺪﺷ ﺪﻨﻫد ؛ رد ﯽﻟﺎﺣ ﻪﮐ يﺮﺻﺎﻨﻋ ﺪﻨﻧﺎﻣ Nb, Ti, Ta, Sr, Ba ﯽﻬﺗ ﺖﯾرﺪﻨﮐ ﺎﺑ ﻪﺴﯾﺎﻘﻣ رد ار ﯽﺼﺧﺎﺷ ﯽﮔﺪﺷ ﯽﻣ ﻪﺋارا .ﺪﻨﻫد ﯽﮔﮋﯾو ﯽﭘﻮﺗوﺰﯾا i ) Nd 144 Nd/ 143 ( ﺖﯾرﻮﯾد ﺎﻫوﺮﺑﺎﮔ و ﺎﻫ ي ﻧﺮﺑ درﻮ هﺮﺘﺴﮔ رد 203 51 / 0 ﺎﺗ 214 51 / 0 ﺑ ﻪ ﺖﺒـﺴﻧ يدﺪﻋ راﺪﻘﻣ .ﺖﺳا هﺪﻣآ ﺖﺳد

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426 هدازﺮﻗﺎﺑ ﯽﻤﻈﻨﻣ و نارﺎﮑﻤﻫ ﻦﯿﻣز يدﺎﺼﺘﻗا ﯽﺳﺎﻨﺷ

1. Volcanic Arc Granites (VAG)

i ) Sr 86 Sr/ 87 ( هدﻮﺗ ﻦﯾا يذﻮﻔﻧ يﺎﻫ هﺮﺘﺴﮔ رد 7038 / 0 ﺎﺗ 135 7 / 0 هزاﺪﻧا ﮔ ﺖﺳا هﺪﺷ يﺮﯿ . راﺪﻘﻣ يدﺪﻋ ) 552 T= ( Nd Ɛ ﺖﯾرﻮﯾد يﺎﻫوﺮﺑﺎﮔ و ﺎﻫ زا درﻮﻧﺮﺑ 0 / 2 ﺎﺗ 0 / 4 ﺑ ﻪ ﺖﺳا هﺪﻣآ ﺖﺳد . ﻦﯿﯾﺎﭘ ﺮﯾدﺎﻘﻣ i ) Sr 86 Sr/ 87 ﻪﻧﻮﻤﻧ ( و درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ يﺎﻫوﺮﺑﺎﮔ و ﺖﯾرﻮﯾد يﺎﻫ ﺮﯾدﺎـﻘﻣ ) present ( 0Nd Ɛ هدﻮﺗ ﻦﯾا ﻪﮐ يذﻮﻔﻧ يﺎﻫ 2 / 0 ﺎﺗ 0 / 4 ﻪﺒﺳﺎﺤﻣ ﺖﺳا هﺪﺷ ، نﺎﺸﻧ هﺪﻨﻫد نآ ﺗ ﻦﯿﻨﭼ ﺪﯿﻟﻮﺗ ﻪﮐ ﺖﺳا هدﻮ ﯽـﻣ يذﻮﻔﻧ يﺎﻫ ﻪﺘـﺷﻮﮔ زا ﯽـﻌﺒﻨﻣ ﻪـﺑ ﺪـﻧاﻮﺗ ﯽﯾﻻﺎﺑ هرﺎﻗ ﻪﺘﺳﻮﭘ ﺎﯾ يا ﻦﯾﺮﯾز راﺮﻗ ﺶﯾﻻآ ﺖﺤﺗ هﺪﺷ ﻪﺘﻓﺮﮔ ، ﺖﺒﺴﻧ .دﻮﺷ هداد ﻞﯿﮑـﺸﺗ ﻂﯿﺤﻣ ﻦـﯾا زا ﻪﺘـﺳد ﮓﻨـﺳ ﺲﮑﻠﭙـﻤﮐ يﺎـﻫ ﮏـﯿﻧﻮﺗﻮﻠﭘ درﻮﻧﺮﺑ ﯽﻧﺎﺸﻔﺸﺗآ نﺎﻤﮐ ﻂﯿﺤﻣ و هرﺎﻗ لﺎﻌﻓ ﻪﯿﺷﺎﺣ ، 1 ﻪﮐ ﺖﺳا ﯽﻣ ﺪﻧاﻮﺗ ﺑﻪ ﯿـﺑ دﻮـﺟﻮﻣ ﯽـﺳﻮﻧﺎﯿﻗا ﻪﺘـﺳﻮﭘ ﺶﻧاروﺮﻓ و يﺰـﮐﺮﻣ ناﺮـﯾا هرﺎـﻗ دﺮـﺧ ﻦ نﺎﻐﻓا كﻮﻠﺑ ﻂﺒﺗﺮﻣ ﺪﺷﺎﺑ . هژاو يﺎﻫ :يﺪﯿﻠﮐ ،ﺲﮑﻠﭙﻤﮐ ﻦﺳ ﯽﺠﻨﺳ ، ،ﻢﺴﯿﺗﺎﻤﮔﺎﻣ ،هرﺎﻗ دﺮﺧ ﻦﯾﺮﺒﻣﺎﮐﺮﭘ ، ،ﻦﮑﺳدﺮﺑ رﺎﻨﮑﺗ

ﻪﻣﺪﻘﻣ رد ،درﻮــﻧﺮﺑ ﮏــﯿﻧﻮﺗﻮﻠﭘ ﺲﮑﻠﭙــﻤﮐ 20 لﺎﻤــﺷ يﺮﺘﻣﻮــﻠﯿﮐ بﺮــﻏ نوز ﻦﯾا .دراد راﺮﻗ رﺎﻨﮑﺗ يرﺎﺘﺧﺎﺳ نوز رد و ﻦﮑﺳدﺮﺑ نﺎﺘﺳﺮﻬﺷ نآ زا ﻪﮐ ﯽﻣ دﺎﯾ ﺰﯿﻧ رﺎﻨﮑﺗ ﯽﺸﯾﺎﺳﺮﻓ هﺮﺠﻨﭘ مﺎﻧ ﺎﺑ دﻮﺷ ، بﻮـﻨﺟ رد تﻮـﻟ كﻮﻠﺑ زا و ﻪـﻧورد ﻞـﺴﮔ ﻂـﺳﻮﺗ راوﺰﺒـﺳ نوز زا لﺎﻤـﺷ رد ﺑﻪ رﺎـﻨﮑﺗ ﻞﺴﮔ ﻪﻄﺳاو ﯽـﻣ اﺪـﺟ ،(شﻮـﯾر) دﻮـﺷ .(Muller and Walter, 1983) ــﻄﯿﺤﻣ ﻊــﻗاو رد رﺎــﻨﮑﺗ ﯽــﺸﯾﺎﺳﺮﻓ هﺮــﺠﻨﭘ ﯽ ﺖـــﺳا راوﺰﺒـــﺳ نوز و تﻮـــﻟ كﻮـــﻠﺑ نﺎـــﯿﻣ رد ﯽﮑﯿﻧﻮـــﺘﮑﺗﻮﺋژ

(Lindenberg and Jacobshagen, 1983)

ﻞﮑــﺷ) 1 رد .( ﮓﻨــﺳ ﻪــﻘﻄﻨﻣ ﻦــﯾا ﯽﮑﯿﺘــﺳﻼﮐوﺮﯿﭘ و ﯽﮑﯿﻧﺎــﮑﻟو يﺎــﻫ ﻪــﺟرد ﺎــﺑ ﻧﻮﮔﺮﮔد ﻦﯿﯾﺎـﭘ ﯽ ﻪـﺑ هاﺮـﻤﻫ ﻪﺘـﺳد يا زا ﯽﺑﻮـﺳر يﺎﻫﺪـﺣاو ﯽـﻤﮐ نﻮﮔﺮﮔد هﺪﺷ لدﺎـﻌﻣ ﯽﻨـﺳ ﺎﺑ ،ﻦﯾﺮﺒﻣﺎـﮐﺮﭘ ﺮـﺧاوا ﻪـﻋﻮﻤﺠﻣ يا ﺎـﺑ دوﺪـﺣ ﺖﻣﺎﺨـﺿ ﻪـﺑ ار رﺎـﻨﮑﺗ ﺪﻧزﺎـﺳ ناﻮﻨﻋ 1650 ﺎـﺗ 1850 ﺮـﺘﻣ ﻞﯿﮑـﺸﺗ داد ه ﺪـﻧا )

Muller and Walter, 1983; Homam,

1992 ( درﻮﻣ ﮏﯿﻧﻮﺗﻮﻠﭘ ﺲﮑﻠﭙﻤﮐ ﻂﺳﻮﺗ ﻪﻋﻮﻤﺠﻣ ﻦﯾا . ﺖﺤﺗ ﺮﻈﻧ و ﺮﯿﺛﺄﺗ راﺮﻗ ذﻮﻔﻧ .ﺖﺳا ﻪﺘﻓﺮﮔ ﯽﻤﯾﺪﻗ رﺎﻨﮑﺗ نوز رد ﻢﺴﯿﻧﻮﺗﻮﻠﭘ ﺖﯿﻟﺎﻌﻓ ﻦﯾﺮﺗ ﻦﯾﺮﺒﻣﺎـﮐﺮﭘ ﺮﺧاوا ﻪﺑ ﯽﻣﺮﺑ ﻪﮐ ددﺮﮔ ﻪﺑ ﺘﯿﻧاﺮﮔ ترﻮﺻ ﺪـﯿﺋﻮ درﻮـﻧﺮﺑ ﺎﮑـﺷآ هﺪـﺷ ر ﺖـﺳا )

Monazzami Bagherzadeh et al., 2015

( ﻦـــﯾا و ﺎﺸﻧ ن هﺪﻨﻫد هدﺮﺘﺴﮔ ﻢﺴﯿﺗﺎﻤﮔﺎﻣ ﻦﯾﺮﺒﻣﺎﮐﺮﭘ .ﺖـﺳا ناﺮـﯾا قﺮـﺷ رد هﻮـﮐ ﺖﯿﻟﺎﻌﻓ ﺎﺑ هدﺮﺘﺴﮔ ﯽﯾﺎﻤﮔﺎﻣ ﺖﯿﻟﺎﻌﻓ ﻦﯾا ﯽـﯾاز ﯽﻫﺎـﮕﻧﺎﺗﺎﮐ رد .دراد ﺖﻘﺑﺎﻄﻣ ناﺮﯾا رد ﯽﻟﺎـﺣ ) ﯽﻧﺎﻄﻠـﺳ ﻪـﮐ Soltani, 2000 رد ( نﺎﯾﺎﭘ شور ﺎـﺑ ار ﺮﻤـﺷﺎﮐ ﻪـﻘﻄﻨﻣ لﺎﻤـﺷ يﺎﻫﺪـﯿﺋﻮﺘﯿﻧاﺮﮔ دﻮـﺧ ﻪﻣﺎﻧ ﻦــﺳ ﻦﯿــﯿﻌﺗ Rb-Sr ﻪــﺑ 43 ﺖﺒــﺴﻧ ﻞــﺒﻗ لﺎــﺳ نﻮــﯿﻠﯿﻣ ﺖــﺳا هداد ) Alaminia et al., 2013 .( ﮏـﯿﻧﻮﺗﻮﻠﭘ ﺲﮑﻠﭙـﻤﮐ درﻮـﻧﺮﺑ رد ﻪـﻋﻮﻤﺠﻣ ﻊﻗاو يا ﻪﯿـﺷﺎﺣ و يﺰـﮐﺮﻣ ﺶـﺨﺑ ود ﻞﻣﺎـﺷ يﻮـﻘﻠﺣ يا نآ يﺰﮐﺮﻣ ﺶﺨﺑ ﻪﮐ ﺖﺳا زا ﻪﻋﻮﻤﺠﻣ ﻂـﺳاوﺪﺣ و ﮏـﯿﻓﺎﻣ يﺎﻫ ﻞﯿﮑﺸﺗ و ﺖﺳا هﺪﺷ ﻪﯿﺷﺎﺣ ﺶﺨﺑ نآ يا يذﻮـﻔﻧ يﺎﻫﺪـﺣاو ﻞﻣﺎـﺷ ﺎـﺑ يﺪﯿـﺳا ﻮـﻨﻋ درﻮـﻧﺮﺑ ﺖـﯿﻧاﺮﮔ نا ) ﺖـﺳا Sepahi Gherow, 1993 (. رد ﻦﯾا ﻪﻟﺎﻘﻣ ﯽﻌﺳ هﺪﺷ ﺖﺳا ﺎﺑ ﻪﯿﮑﺗ ﺑﺮ ﺞﯾﺎـﺘﻧ ﻞـﺻﺎﺣ زا ﯽـﺳرﺮﺑ ﻂـﺑاور ﯽﯾاﺮﺤـﺻ ﻢﮐﺎـﺣ ﺮـﺑ ﺶـﺨﺑ يﺎـﻫ ﺲﮑﻠﭙـﻤﮐ ﻒـﻠﺘﺨﻣ ﮏﯿﻧﻮﺗﻮﻠﭘ درﻮﻧﺮﺑ ، ﻦﺳ ،ﯽﺠﻨﺳ ﮓﻨﺳ ﯽﺳﺎﻨﺷ و ﯽﻤﯿﺷﻮﺋژ ﺮـﺻﺎﻨﻋ ﯽﻠﺻا و ﺎﯿﻤﮐ ﮓﻨﺳ ب ﻂﺳاوﺪﺣ يﺎﻫ ﮏﯿﻓﺎﻣ و ﻪﻋﻮﻤﺠﻣ ﻦﯾا ، ﻪـﺑ ﯽﺳرﺮﺑ ﺗرا طﺎﺒ ﯽﮑﯿﺘﻧژ ﻦﯿﺑ ﺶﺨﺑ يﺎـﻫ ـﻠﺘﺨﻣ ﻒ ، ﺄـﺸﻨﻣ يﺎـﻤﮔﺎﻣ هﺪﻧزﺎﺳ هﺎﮕﯾﺎﺟ و ﯿﻣز ﻦ ﯽﺘﺧﺎﺳ ﻪﺘﺧادﺮﭘ ﺎﻬﻧآ دﻮﺷ .

ﻪﻌﻟﺎﻄﻣ شور و ﯽﮕﻨــﺳ تﻼﯿﮑــﺸﺗ ﻪــﻌﻟﺎﻄﻣ هراﻮﻫﺎــﻣ ﺮﯾوﺎــﺼﺗ شزادﺮــﭘ يا + ETM ﻪﻘﻄﻨﻣ ياﺮﺑ ﻦﯿـﻣز ﻪﺸﻘﻧ ﻪﯿﻬﺗ سﺎـﯿﻘﻣ ﺎـﺑ ﯽـﺳﺎﻨﺷ 1:25000 مﺎﺠﻧا ﺖﺳا هﺪﺷ . -ﻪﻧﻮﻤﻧ زا يرادﺮﺑ 7 هدﻮﺗ ﻦﯾرذآ يذﻮﻔﻧ ﯽـﻓاﺮﮔوﺮﺘﭘ ﯽﺳرﺮﺑ ياﺮﺑ و راﺪــﻘﻣ ﺶﺠﻨــﺳ ﯽﻠــﺻا يﺎﻫﺪﯿــﺴﮐا ﻪــﺑ شور XRD و ﺮــﺻﺎﻨﻋ ﻪﺑ ﯽﮐﺎﺧ ردﺎﻧ و بﺎﯿﻤﮐ شور ICP-MS رد هﺎﮕﺸﯾﺎﻣزآ ACME مﺎﺠﻧا ادﺎﻧﺎﮐ رﻮﺸﮐ .ﺖﺳا هﺪﺷ -ﻪﻧﻮﻤﻧ ﺖﯾرﻮﯾد زا يرادﺮﺑ ياﺮﺑ ﻪﻘﻄﻨﻣ يﺎﻫ ﯽﻧﺎﮐ ﻖﻠﻄﻣ ﻦﺳ ﻦﯿﯿﻌﺗ

(5)

ﺪﻠﺟ 10 هرﺎﻤﺷ ، 2 لﺎﺳ) 1397 ( ﻦﺳ ،ﯽﺠﻨﺳ يژﻮﻟوﺮﺘﭘ ، ﯽﻤﯿﺷﻮﺋژ ﮓﻨﺳ ﻢﺴﯿﺗﺎﻤﮔﺎﻣﻮﻧﻮﺘﮑﺗ و يﺎﻫ ﻂﺳاوﺪﺣ ... 427

ﻪـﺑ ﻦﮐﺮـﯾز شور U-Pb ﺎـﮑﯾﺮﻣا وداﺮـﻠﮐ هﺎﮕـﺸﻧاد هﺎﮕـﺸﯾﺎﻣزآ رد راﺮﻗ ﯽﺳرﺮﺑ درﻮﻣ ﺖﺳا ﻪﺘﻓﺮﮔ هﺎﮕﯾﺎﺟ و ﯽﮑﯿﺘﻧژ طﺎﺒﺗرا ﻦﯿﻣز ﯽﺘﺧﺎﺳ هدﻮﺗ يﺎﻫ ﻦـﯾرذآ يذﻮـﻔﻧ ﻪﻘﻄﻨﻣ هداد ﺮﯿﺴﻔﺗ زا هدﺎﻔﺘﺳا ﺎﺑ ﯽﯾﺎﯿﻤﯿـﺷﻮﺋژ يﺎـﻫ و ﯽـﺳرﺮﺑ درﻮـﻣ راﺮﻗ ﻪﻌﻟﺎﻄﻣ .ﺖﺳا ﻪﺘﻓﺮﮔ ﻞﮑﺷ 1 . ﻌﻗﻮﻣ ﯿ رﺎﻨﮑﺗ نوز ﺖ ، و تﻮﻟ كﻮﻠﺑ ﻞﺴﮔ رﺎﻨﮑﺗ و ﻪﻧورد يﺎﻫ

(Lindenberg and Jacobshagen, 1983)

Fig. 1. The location of Taknar zone, Lut Block and Drouneh and Taknar faults (Lindenberg and Jacobshagen, 1983)

ﻦﯿﻣز ﯽﺳﺎﻨﺷ ﻪﻘﻄﻨﻣ يذﻮﻔﻧ ﺲﮑﻠﭙﻤﮐ درﻮﻧﺮﺑ ﻪﺑ ﻪﭙﺗ ﻪﻋﻮﻤﺠﻣ ترﻮﺻ عﺎـﻔﺗرا ﻢـﮐ يﺎـﻫ هﻮـﮐ و ﺰﮐﺮﻣ رد نﻮـﻤﻨﺧر فاﺮـﻃا رد ﻊـﻔﺗﺮﻣ يﺎـﻫ ﻪﺘـﺷاد ﺖـﺳا و دوﺪــﺣ رد ﯽﺘﺣﺎــﺴﻣ 55 ﯽــﻣ ﻞﻣﺎــﺷ ار ﻊــﺑﺮﻣ ﺮﺘﻣﻮــﻠﯿﮐ ﻦــﯾا .دﻮــﺷ ﻦﮑـﺳدﺮﺑ نﺎﺘﺳﺮﻬﺷ ﻊﺑاﻮﺗ زا درﻮﻧﺮﺑ يﺎﺘﺳور فاﺮﻃا رد ﺲﮑﻠﭙﻤﮐ ﻊﻗاو ﻦﯿـﻣز ظﺎﺤﻟ زا .ﺖﺳا هﺪﺷ زا ﯽـﮔرﺰﺑ ﺖﻤـﺴﻗ ،ناﺮـﯾا ﯽـﺳﺎﻨﺷ ﯽــﻣ ﻞﯿﮑــﺸﺗ ار رﺎــﻨﮑﺗ يرﺎﺘﺧﺎــﺳ نوز ﻪــﺑ لﺎﻤــﺷ زا ﻪــﮐ ﺪــﻫد ﺖــﻓﺮﺑآ ﺎﻫﺪﻧزﺎــﺳ و شﻮــﯾر ﻞــﺴﮔ فاﺮــﻃا رد يﺮﻧﺮﺗاﻮــﮐ يﺎــﻫ ي ﯽــﻣ راوﺰﺒــﺳ نوز ﻪــﺑ طﻮــﺑﺮﻣ ﮏــﯿﻧﻮﺗﻮﻠﭘ ﺲﮑﻠﭙــﻤﮐ ذﻮــﻔﻧ .ﺪــﺳر درﻮـﻣ ﯽﻧﻮــﮔﺮﮔد دﺎـﺠﯾا ﻦﯿـﻨﭽﻤﻫ و رﺎـﻨﮑﺗ ﺪﻧزﺎــﺳ ﻞـﺧاد رد ﺮـﻈﻧ ﻪـﻋﻮﻤﺠﻣ رد ﯽﺗروﺎـﺠﻣ ﺗ ﺖﻨﻤﯾﺪــﺳﻮﻧﺎﮑﻟو ذﻮــﻔﻧ ﺮـﺛا رد ﻪــﮐ رﺎـﻨﮑ ﮓﻨﺳ دﺎﺠﯾا ﺲﮑﻠﭙﻤﮐ ﻦﯾا يﺎﻫ ﺖﺳا هﺪﺷ ﺮﮕﻧﺎﯿﺑ ، ناﻮـﺟ ﺮـﺗ ندﻮـﺑ .ﺖﺳا ﻪﻋﻮﻤﺠﻣ ﻦﯾا زا ﮓﻨـﺳ ظﺎﺤﻟ ﯽـﺳﺎﻨﺷ ، ﺮﺘـﺸﯿﺑ ﻦﯾ ﻢـﺠﺣ ﻦـﯾا ﮓﻨـﺳ زا ﻪﻋﻮﻤﺠﻣ ﻞﯿﮑـﺸﺗ يﺪـﯿﺋﻮﺘﯿﻧاﺮﮔ يﺎـﻫ رد ﻪـﮐ ﺖـﺳا هﺪـﺷ يﺰﮐﺮﻣ ﺶﺨﺑ ، هدﻮـﺗ ﮓﻨـﺳ زا ﯽﯾﺎـﻫ و ﯽﺘﯾرﻮـﯾد ،ﯽﯾوﺮﺑﺎـﮔ يﺎـﻫ ﯽﻣ هﺪﯾد ﯽﺘﯾرﻮﯾدﺰﺗراﻮﮐ دﻮﺷ ﻞﮑﺷ) 2 ( هدﻮﺗ ﻦﯾا . و ﮏـﯿﻓﺎﻣ يﺎـﻫ ﻂﺳاوﺪﺣ ﻪﺑ ﺐﻠﻏا ﺎﺑ ﯽﯾﺎﻫﺰﯿﻓﻮﭘآ ترﻮﺻ درﻮﺧﺮﺑ يﺎﻫﺪﺣاو ﻪﻠﺴﮔ ﺰـﮐﺮﻣ ﺶـﺨﺑ ﯽﺘﯿﻟﺎـﻧﻮﺗ و ﯽﺘﯾرﻮﯾدﻮﻧاﺮﮔ ،ﯽﺘﯿﻧاﺮﮔ ار ﺲﮑﻠﭙـﻤﮐ ي هدﺮــﮐ ﻊــﻄﻗ يﺪﻫاﻮــﺷ سﺎــﺳا ﺮــﺑ .ﺪــﻧا ﺪــﻨﻧﺎﻣ (ﻒــﻟا : دﻮــﺟو زﺮــﻣ ﯽﮔاﺰﮕﯾز ﻦﯿﺑ ﯾرﻮﯾد ﺖ و ﺎﻫ ﯾرﻮﯾدﻮﻧاﺮﮔ ﺖ (ب ،ﺎﻫ ﻪﯿﺷﺎﺣ دﺎـﻤﺠﻧا ﻊﯾﺮــﺳ ﮓﻨــﺳ يﺎــﻫ ﯽﺘﯾرﻮــﯾدﺰﺗراﻮﮐ رد ﻞــﺤﻣ يﺮــﺒﻤﻫ ﺎــﺑ ﺖﯿﻧاﺮﮔ و ﺖﯾرﻮﯾدﻮﻧاﺮﮔ يﺰـﮐﺮﻣ ﺶـﺨﺑ يﺎـﻫ و و ﯽﻧﺎـﺳﺮﮔد (ج ﯽﺘﯿﻧﻮﻠﯿﻣ رد يﺰـﮐﺮﻣ ﺶـﺨﺑ يﺪـﯿﺋﻮﺘﯿﻧاﺮﮔ يﺎﻫﺪـﺣاو نﺪـﺷ ﻞـﺤﻣ سﺎﻤﺗ ﺎﺑ ناﻮـﺟ ،ﺮﻈﻧدرﻮﻣ ﻂﺳاوﺪﺣ و ﮏﯿﻓﺎﻣ يﺎﻫﺪﺣاو ندﻮـﺑ ﺮـﺗ ﺲﮑﻠﭙﻤﮐ يﺰﮐﺮﻣ ﺶﺨﺑ يﺎﻫﺪﯿﺋﻮﺘﯿﻧاﺮﮔ زا ار ﺎﻫﺪﺣاو ﻦﯾا درﻮـﻧﺮﺑ ﯽﻣ تﺎﺒﺛا ﻪـﺑ ﻂـﺳاوﺪﺣ و ﮏـﯿﻓﺎﻣ يﺎﻫﺪﺣاو ﻦﯿﻤﻫ ﺎﻣا .ﺪﻨﮐ ﺖﻤـﺳ ﻪﯿـﺷﺎﺣ ﮓـﻧر ﻦـﺷور ﺖـﯿﻧاﺮﮔ ﻂـﺳﻮﺗ ﻪﯿﺷﺎﺣ ﺖـﯿﻧاﺮﮔ ﻪـﺑ ﻪـﮐ يا ﺖﺳا رﻮﻬﺸﻣ درﻮﻧﺮﺑ ، راﺮـﻗ ذﻮﻔﻧ درﻮﻣ ﮔ ﺮ و ﻪـﺘﻓ و ﯽﻧﺎـﺳﺮﮔد رﺎـﭼد

(6)

ﯽﺗوﺪﯿﭘا نﺪﺷ هﺪﺷ ﻪـﮔر و ﯽﻧﺎـﮐ يوﺎـﺣ ﺰﺗراﻮـﮐ ﺲﻨـﺟ زا ﯽﯾﺎـﻫ ﻪﮔر و ﻦﯿﻟﺎﻣرﻮﺗ ﻠﯿﺳ يﺎﻫ ﯿ ﺎـﻬﻧآ رد ﺖـﯿﺗﺎﻤﻫ و ﺖـﯿﺘﻨﮕﻣ يوﺎﺣ ﯽﺴ .ﺖـﺳا هدﺮـﮐ ذﻮﻔﻧ ـﺑ ﮏـﯿﻧﻮﺗﻮﻠﭘ ﺲﮑﻠﭙـﻤﮐ ﻦـﯾا ﻪ ﺶـﺨﺑ رد هﮋـﯾو ﻪــﻋﻮﻤﺠﻣ ﻂــﺳﻮﺗ يﺰـﮐﺮﻣ ﮏــﯾاد زا يا يﺎــﻫ ﺄــﺗ ﺎــﺑ ﯽــﺘﯾﺮﻟد يﺮﯿﺧ ﮓﻨﺳ ﻪﺑﺎﺸﻣ ﺐﯿﮐﺮﺗ ﺮﮑﯿﻣ و ﯽﯾوﺮﺑﺎـﮔ يﺎﻫ ﯽﺘﯾرﻮـﯾدو ذﻮـﻔﻧ درﻮـﻣ راﺮﻗ .ﺖﺳا ﻪﺘﻓﺮﮔ ﮏﯾاد زا ﻪﺘﺳد ﻦﯾا ﯽﯾﺎـﻤﮔﺎﻣ هدﻮـﺗ ﺮﮕﻧﺎﯿﺑ ﺮﻤﺷﺎﮐ ﻪﻘﻄﻨﻣ ﺪﻨﻧﺎﻤﻫ ﺎﻫ دﺮﺳ ﮏﯿﻓﺎﻣ بﻮـﺴﺤﻣ ﺰﯿﻧ ﯽﻧﺎﺳﺮﮔد ﻞﻣﺎﻋ ﻪﮐ ﺪﻨﺘﺴﻫ ﻖﻤﻋ رد هﺪﺷ ﯽﻣ ) ﺪﻧﻮﺷ Almasi et al., 2015 .(

ﻞﮑﺷ 2 . ﻦﯿﻣز ﻪﺸﻘﻧ ﻪﺑ درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ ﯽﺳﺎﻨﺷ ﻮﻣ هاﺮﻤﻫ ﻪﻧﻮﻤﻧ ﺖﯿﻌﻗ ﯽﮕﻨﺳ يﺎﻫ

(7)

ﺪﻠﺟ 10 هرﺎﻤﺷ ، 2 لﺎﺳ) 1397 ( ﻦﺳ ،ﯽﺠﻨﺳ يژﻮﻟوﺮﺘﭘ ، ﯽﻤﯿﺷﻮﺋژ ﮓﻨﺳ ﻢﺴﯿﺗﺎﻤﮔﺎﻣﻮﻧﻮﺘﮑﺗ و يﺎﻫ ﻂﺳاوﺪﺣ ... 429 1. Opaque mineral 2. Automorphic ﮓﻨﺳ ﯽﻓاﺮﮔوﺮﺘﭘ ﮏﯿﻓﺎﻣ و ﻂﺳاوﺪﺣ يﺎﻫ ﺖﯾرﻮﯾد ﮏﯾاد و ﺎﻫ ﯽﺘﯾرﻮﯾدوﺮﮑﯿﻣ يﺎﻫ ﮓﻨــﺳ ﻦــﯾا ﻪــﻋﻮﻤﺠﻣ ﻞﻣﺎــﺷ ﺎــﻫ يا ﮓﻨــﺳ زا ﺎــﺗ ﺖــﯾرﻮﯾد يﺎــﻫ ﻪــﺑ ﺖــﯾرﻮﯾدﺰﺗراﻮﮐ ﮏــﯾاد هاﺮــﻤﻫ ﺘﯾرﻮــﯾدوﺮﮑﯿﻣ يﺎــﻫ ﺪﻨﺘــﺴﻫ ﯽ . ﮓﻨــﺳ رﻻﻮــﻧاﺮﮔ فرﻮﻣﻮﯾﺪــﯿﭙﯿﻫ ﺐــﻟﺎﻏ ﺖــﻓﺎﺑ ﺎــﺑ ﯽﺘﯾرﻮــﯾد يﺎــﻫ و رﻮﻠﺑ ﺰﯾر ﺎﺗ ﻂﺳﻮﺘﻣ ﯽﻫﺎﮔ ﻞﮑـﺷ) لﺎﺗﺮـﺳﺮﺘﻨﯾا ،ﮏﯿﺘﯿﻓا 3 -A و ( ﯽﻧﺎــﮐ ﻞﻣﺎــﺷ ﺪــﯿﺋوﺮﯿﻓرﻮﭘ يﺎــﻫ ﻤﻫ ﯽﻠــﺻا زﻼﮐﻮــﯾژﻼﭘ نﻮــﭽ و ﯽﻧاواﺮﻓ ﺎﺑ ﺎﻫزﻼﮐﻮﯾژﻼﭘ .ﺖﺳا ﺪﻨﻠﺒﻧرﻮﻫ 45 - 55 ﺪﺻرد ﻪﺑ ترﻮﺻ ﻞﮑﺷ د ﻞﮑـﺷ ﻪـﻤﯿﻧ ﺎـﺗ را ـﻠﭘ ﻞـﮐﺎﻣ ﺎـﺑ راد ﯽ ـﺳ ﯿ نوز و ﮏﯿﺘﺘﻨ يﺪـﻨﺑ هﺪﺷ رﺎﮑﺷآ .ﺪﻧا زﻼﮐﻮﯾژﻼﭘ ﺐﯿﮐﺮﺗ ﺎﻫ ﮓﻨـﺳ ﻦـﯾا رد زا ﺮﺘـﺸﯿﺑ ﺎـﻫ رد ﯽﺘﯾرﻮـﺳﻮﺳ ﻪـﯾﺰﺠﺗ .ﺖﺳا ﻦﯾزﺪﻧآ عﻮﻧ ﯽﻧﺎـﮐ ﻦـﯾا ـﺑ ﻪ رد هﮋـﯾو يﺎﻫزﻼﮐﻮﯾژﻼﭘ ﺰﮐﺮﻣ ﮓﻨﯿﻧوز راد ًﻼﻣﺎﮐ ﺪﻨﻠﺒﻧرﻮﻫ .ﺖﺳا ﺺﺨﺸﻣ ﻪﺑ ﺖـﯾرﻮﯾد ﻦﯾﺰـﯿﻨﻣوﺮﻓ ﯽﻧﺎـﮐ ﺎـﻬﻨﺗ ناﻮـﻨﻋ ﺎـﻫ ﯽـﻧاواﺮﻓ ﺎـﺑ 40 - 50 ﺪﺻرد ﻪﺑ رﻮﺻ ﻞﮑﺷ ﻪﻤﯿﻧ ت و راد هﺎﮔ ﻪﺑ رد رﻻﻮـﻧاﺮﮔﺮﺘﻨﯾا ترﻮﺻ ﯽﻣ هﺪﯾد زﻼﮐﻮﯾژﻼﭘ يﺎﻫرﻮﻠﺑ ﻦﯿﺑ ﻊـﻄﻘﻣ رد ﯽﻧﺎﮐ ﻦﯾا ﮓﻧر .دﻮﺷ هﻮـــﻬﻗ ﺎـــﺗ ﺰﺒـــﺳ زا كزﺎـــﻧ ﻦـــﺷور يا ﺮـــﯿﻐﺘﻣ .ﺖـــﺳا عاﻮـــﻧا رد ﺖـﯾرﻮﯾدﺰﺗراﻮﮐ هوﻼـﻋ ﺎـﻫ هﺪــﯾد ﺰـﯿﻧ ﺖـﯿﺗﻮﯿﺑ ،ﺪـﻨﻠﺒﻧرﻮﻫ ﯽﻧﺎـﮐ ﺮـﺑ ﯽﻣ .دﻮﺷ ﻢﮐ راﺪﻘﻣ ﻪﺑ ﺰﺗراﻮﮐ دوﺪﺣ) 5 (ﺪﺻرد ﺮﺘﺸﯿﺑ و ﻪﺑ ترﻮﺻ ﯽﺑ و ﺰﯾر ﻪﻧاد .ﺖﺳا هﺪﻨﮐاﺮﭘ ﮓﻨﺳ ﻦﺘﻣ رد ﻞﮑﺷ ،ﺖﯿﺳﺮﺳ ﻪـﺑ ﺖـﯾﺰﯿﺋوزﻮﻨﯿﻠﮐ و ﺖـﯾﺰﯿﺋوز ،توﺪﯿﭘا ﺖـﯿﺗﻮﯿﺑ هاﺮـﻤﻫ ﻪﺠﯿﺘﻧ ﯽﮕﻤﻫ ﻪﮐ ﺖﯾﺮﻠﮐ و ﻪﯾﻮﻧﺎﺛ ﯽﻧﺎـﺳﺮﮔد ﯽﻧﺎـﮐ ﻪـﯾﺰﺠﺗ و يﺎـﻫ ﺪﻨﺘﺴﻫ ﺪﻨﻠﺒﻧرﻮﻫ و زﻼﮐﻮﯾژﻼﭘ ﯽﻨﻌﯾ ﮓﻨﺳ ﯽﻠﺻا ، هﺪـﯾد ﻊﻃﺎﻘﻣ رد ﯽﻣ ﮓﻨﺳ ﻦﯾا .ﺪﻧﻮﺷ ﻪﺑ ﺎﻫ ﯽﻧﺎـﮐ ﯽﻧاواﺮﻓ ﻞﯿﻟد ﺪـﻨﻠﺒﻧرﻮﻫ ﻦﯾﺰـﯿﻨﻣوﺮﻓ ﮓﻨﺳ ﻊﻗاو رد ﺎﻬﻧآ رد .ﺪﻨﺘﺴﻫ ﯽﺘﯾرﻮﯾدﺪﻨﻠﺒﻧرﻮﻫ يﺎﻫ ﺖﯾرﻮﯾدﺰﺗراﻮﮐ ﺮﻈﻧ زا ﺎﻫ ﯽﮔﮋﯾو يﺎﻫ ﮓﻨﺳ ًﻼﻣﺎﮐ ﯽﺳﺎﻨﺷ هوﺮﮔ ﺎﺑ ﺖﯾرﻮﯾد هوﺮـﮔ ﺎـﺑ ﺰﺗراﻮـﮐ راﺪـﻘﻣ ظﺎﺤﻟ زا ﻂﻘﻓ ،ﺪﻨﺘﺴﻫ نﺎﺴﮑﯾ ﺎﻫ ﻪـﺑ و ﺖـﺳا ﺮﺗﻻﺎﺑ ﺎﻬﻧآ رد ﺰﺗراﻮﮐ راﺪﻘﻣ و هدﻮﺑ توﺎﻔﺘﻣ ﯽﻠﺒﻗ رﻮـﻃ ﻦﯿﺑ ﯽﺒﯾﺮﻘﺗ 5 ﺗ ﺎ 20 ﯽﻧﺎﮐ ﺪﺻرد ﯽـﻣ ﻞﯿﮑـﺸﺗ ار ﮓﻨﺳ يﺎﻫ ﻫد ـﻨ .ﺪ ﯽﻫﺎﮔ ﮓﻨﺳ ﻦﯾا رد ﺰـﯿﻧ ﺪـﯿﺋوﺮﯿﻓرﻮﭘ ﺖـﻓﺎﺑ ﺎﻫ ﯽـﻣ هﺪـﯾد دﻮـﺷ ﻪـﮐ ﺖــﺴﯾﺮﮐﻮﻨﻓ ﻪــﺑ زﻼﮐﻮــﯾژﻼﭘ و ﺪــﻨﻠﺒﻧرﻮﻫ يﺎــﻫ ﺖــﺷرد ترﻮــﺻ رﻮﻠﺑ ﻞﮑـﺷ) ﺪﯾﺪـﺷ ﺎـﺗ ﻂـﺳﻮﺘﻣ ﯽﻧﺎﺳﺮﮔد ﺎﺑ ﯽﯾﺎﻫ 3 -B ( ﻪـﻨﯿﻣز رد هﺪﻫﺎﺸﻣ ﻞﺑﺎﻗ ﮓﻨﺳ ﻪﻧﻮﻤﻧ رد .ﺪﻧا ﺖﯾرﻮﯾدﺰﺗراﻮﮐ زا ﯽﯾﺎﻫ ﯽﻧﺎـﮐ ﺎـﻫ ﺖــﺳا ﺪــﻨﻠﺒﻧرﻮﻫ ﮓﻨــﺳ ﯽﻠــﺻا ﻦﯾﺰــﯿﻨﻣوﺮﻓ ، هوﺮــﮔ فﻼﺧﺮــﺑ ﺖﯾرﻮﯾد ﺖﯿﺗﻮﯿﺑ عﻮﻧ زا ﻪﮐ ﺎﻫ ﺖﺳا . ﮏﯾاد ﺐﯿﮐﺮﺗ رد ﺮﺘﺸﯿﺑ پﻮﮑﺳوﺮﮑﯿﻣ ﺮﯾز رد ﯽﺘﯾرﻮﯾدوﺮﮑﯿﻣ يﺎﻫ ﺎـــﺑ ﺎـــﻬﻧآ توﺎـــﻔﺗ ﺎـــﻬﻨﺗ و ﺖـــﺳا ﺖـــﯾرﻮﯾدﺰﺗراﻮﮐوﺮﮑﯿﻣ ﺪـــﺣ ﺖﯾرﻮﯾدﺰﺗراﻮﮐ ﻪﻧاد هزاﺪﻧا رد ﺎﻫ ﻦـﯾا رد .ﺖـﺳا ﮓﻨـﺳ ﺖـﻓﺎﺑ و ﺎﻫ ﮏﯾاد ﺎﻫ ، ﻪﺑ ﺖﯿﺘﻨﮕﻣ ﻮﺻ ﯽﻧﺎﮐ تر هﺮـﯿﺗ 1 كزﺎـﻧ ﻊﻃﺎـﻘﻣ رد هﺪـﯾد ﯽﻣ دﻮﺷ نﺎﺸﻧ ﻪﮐ ﻻﺎـﺑ و ناﺪﯿـﺴﮐا ﻂﯾاﺮـﺷ هﺪﻨﻫد رﺎـﺨﺑ رﺎـﺸﻓ ندﻮـﺑ ﻞﯿﮑــﺸﺗ يﺎــﻤﮔﺎﻣ رد بآ .ﺖــﺳا ﮓﻨــﺳ هﺪــﻨﻫد ﺎــﺑ ﺖــﯾﺮﯿﭘ ﯽﻧﺎــﮐ ﻪـﺑ ﻪــﻧﻮﻤﻧ ﺢﻄـﺳ رد ﻦﯿﯾﺎـﭘ رﺎﯿـﺴﺑ ﯽـﻧاواﺮﻓ هﺪــﯾد هﺪـﻨﮐاﺮﭘ ترﻮـﺻ ﯽﻣ ﺖـﯾﺮﯿﭘ .دﻮـﺷ فرﻮـﻣﻮﺗا ﺎـﻫ 2 ﻦﯿـﺑ يدﺎـﻌﺑا و ﺪﻨﺘـﺴﻫ 50 ﺎـﺗ 400 اد نوﺮﮑﯿﻣ ﻪﻧاد زا ﯽﻀﻌﺑ .ﺪﻧر ﯽﮕﺘـﺴﮑﺷ رد ﻪﮐ ﺎﻫ ،ﺪـﻧراد راﺮـﻗ ﺎـﻫ ﻪﺑ لﻮﻠﺤﻣ ﺮﯿﺛﺄﺗ ﻞﯿﻟد ﻦـﻫآ يﺎﻫﺪﯿـﺴﮐورﺪﯿﻫ ﻂـﺳﻮﺗ ،ﯽﺤﻄـﺳ يﺎﻫ هﺪﺷ ﻦﯿﺸﻧﺎﺟ .ﺪﻧا

ﮏﯾاد و ﺎﻫوﺮﺑﺎﮔ ﯽﺘﯾﺮﻟد يﺎﻫ ﺎـﻫوﺮﺑﺎﮔ ﺖﻓﺎﺑ ، ،رﻻﻮـﻧاﺮﮔ فرﻮﻣﻮﯾﺪـﯿﭙﯿﻫ ﻞﮑـﺷ) لﺎﺗﺮـﺳﺮﺘﻨﯾا 4 ( ﯽﺋﻮﭘ بﺎﺳ و ﮏﯿﺘﯿﻠﯿﮐ ﻪـﺑ زﻼﮐﻮـﯾژﻼﭘ .ﺖﺳا ﮏﯿﺘﯿﻓا ﯽﻧﺎـﮐ ناﻮـﻨﻋ ا ﮓﻨــﺳ ﻦــﯾا ﯽﻠــﺻ ﺎــﻫ ﯽــﻧاواﺮﻓ ﺎــﺑ 45 - 54 ﺪــﺻرد سﺎــﺳا ﺮــﺑ هزاﺪﻧا ﯽﺷﻮﻣﺎﺧ ﻪﯾواز يﺮﯿﮔ ، ﯽﻫﺎـﮔ و ﺖـﯾروداﺮﺑﻻ عﻮـﻧ زا ﺮﺘـﺸﯿﺑ ﺑﺎ ﯽﻠﭘ ﻞﮐﺎﻣ ﺎﺑ ﺖﯿﻧﻮﺘﯾ ـﺳ ﯿ وز ﺖﺧﺎـﺳ ياراد و ﮏﯿﺘﺘﻨ ﻧ .ﺖـﺳا ﮓـﻨﯿ ﯽﻧﺎﮐ ﻦﯾا ﯽﻧﺎﺳﺮﮔد رﺎﭼد ﻊﻃﺎﻘﻣ ﯽﻀﻌﺑ رد ﺎﻫ ﻪﺑ و هﺪﺷ ﯽﻧﺎـﮐ يﺎـﻫ توﺪﯿﭘا ، ﻮـﺳﻮﺳ) تﺎـﻨﺑﺮﮐ و ﺖﯿﺳﺮﺳ ،ﺖﯾﺰﯿﺋوزﻮﻨﯿﻠﮐ ﯽﺘﯾر (نﺪـﺷ هﺪﺷ ﻞﯾﺪﺒﺗ ﺪﻧا . و (ﻮﻨﯿﻠﮐ و ﻮﺗروا) ﻦﺴﮐوﺮﯿﭘ ﺪﻨﻠﺒﻧرﻮﻫ عﻮـﻤﺠﻣ رد ﯽــﻧاواﺮﻓ ﺎــﺑ 43 - 52 ﺪــﺻرد ﻪــﺑ و يرﻮــﺸﻨﻣ يﺎــﻫرﻮﻠﺑ ترﻮــﺻ ﯽﺑ ﻪﺑ ،ﻞﮑﺷ ﯽﻧﺎﮐ ناﻮﻨﻋ يﺎﻫ ﯽﻠﺻا ﮓﻨـﺳ ﻦﯾا ﻦﯾﺰﯿﻨﻣوﺮﻓ ﻞـﺑﺎﻗ ﺎـﻫ هﺪﻫﺎﺸﻣ ﺪﻧا ﯽﻧﺎـﮐ ﻦـﯾا ﯽﻫﺎـﮔ . ﺎـﻫ ﻊﻃﺎـﻘﻣ رد ار ﯽﺘـﺷرد يﺎـﻫرﻮﻠﺑ ﯽﻣ ﻞﯿﮑﺸﺗ ﻫد ﻨ ﻪـﺑ ﻪـﮐ ﺪ ترﻮـﺻ ﯽﺋﻮـﭘ ﺖـﻓﺎﺑ ﮐ ﯿ ﮏـﯿﺘﯿﻠ ، يﺎـﻫرﻮﻠﺑ ار زﻼﮐﻮﯾژﻼﭘ ﮏﭼﻮﮐ ﻪﺘﻓﺮﮔﺮﺑرد .ﺖﺳا ﺖﻤﺴﻗ زا ﯽﻀﻌﺑ رد ،ﺎـﻫ ﻦﺴﮐوﺮﯿﭘ يﺎﻫرﻮﻠﺑ هﺪﺷ ﻞﯾﺪﺒﺗ ﺖﯿﻟاروا ﯽﻧﺎﺳﺮﮔد ﻪﻋﻮﻤﺠﻣ ﻪﺑ .ﺪـﻧا ﺖﻤـــﺴﻗ زا ﯽـــﻀﻌﺑ رد ﺰـــﯿﻧ ﺪـــﻨﻠﺒﻧرﻮﻫ ﻦﯿـــﻨﭽﻤﻫ ﯽﻧﺎـــﺳﺮﮔد ﺎـــﻫ

(8)

430 هدازﺮﻗﺎﺑ ﯽﻤﻈﻨﻣ و نارﺎﮑﻤﻫ ﻦﯿﻣز يدﺎﺼﺘﻗا ﯽﺳﺎﻨﺷ 1. Propylitic alteration ﮏﯿﺘﯿﻠﯿﭘوﺮﭘ 1 نﺎﺸﻧ ﯽﻧﺎﮐ ﺎﺑ و هداد و توﺪـﯿﭘا ،ﺖﯾﺮﻠﮐ ،ﺖﯿﺗﻮﯿﺑ يﺎﻫ ﺖﯿﻟﻮﻨﯿﺘﮐا هﺪﺷ ﻦﯿﺸﻧﺎﺟ .ﺪﻧا ﯽﻧﺎﮐ ﻪﻠﻤﺟ زا ﮓﻨـﺳ ﻦـﯾا رد ﯽـﺋﺰﺟ و ﯽﻋﺮﻓ يﺎﻫ ﯽـﻣ ﺎـﻫ زا ناﻮـﺗ ﻪﺑ ﺰﺗراﻮﮐ ﯽﻧﺎﮐ ﯽﺑ و ﺰﯾر رﺎﯿﺴﺑ يﺎﻫرﻮﻠﺑ ترﻮﺻ رد هﺪﻨﮐاﺮﭘ ﻞﮑﺷ ﻪﺑ و ﮓﻨﺳ زا ﺮﺘﻤﮐ) ﻦﯿﯾﺎﭘ رﺎﯿﺴﺑ راﺪﻘﻣ 1 ﻦﯿـﻨﭽﻤﻫ .دﺮﺑ مﺎﻧ (ﺪﺻرد ﯽﻧﺎﮐ ﺮﮕﯾد و ﺖﯿﺘﻨﮕﻣ ،ﺖﯿﺗﺎﭘآ ﯽـﻧاواﺮﻓ ﺎـﺑ عﻮـﻤﺠﻣ رد هﺮـﯿﺗ يﺎـﻫ دوﺪﺣ 2 ﺪﺻرد ﮓﻨـﺳ ﻦـﯾا رد ﺰـﯿﻧ ﻪـﺑ ﺎـﻫ هﺪـﯾد هﺪـﻨﮐاﺮﭘ ترﻮـﺻ ﯽﻣ .دﻮﺷ ﯽﻧﺎـﮐ ﻦﯾﺮﺘﺸﯿﺑ ﺖﯿﻟﻮﻨﯿﺘﮐا و ﺖﯾﺮﻠﮐ ،ﻪﯾﻮﻧﺎﺛ ﺖﯿﺗﻮﯿﺑ ار ﻪـﯾﻮﻧﺎﺛ يﺎـﻫ ﯽﻣ ﻞﯿﮑﺸﺗ ﻦـﯾا رد .ﺪﻨﺘـﺴﻫ ﺪﻨﻠﺒﻧرﻮﻫ نﻮﯿﺳاﺮﺘﻟآ ﻪﺠﯿﺘﻧ ﻪﻤﻫ و ﺪﻨﻫد ﮓﻨـــﺳ ﺮﺳ و توﺪـــﯿﭘا ،ﺎـــﻫ ﯾ ﯽﻧﺎـــﺳﺮﮔد ﻪـــﺠﯿﺘﻧ ﻪـــﮐ ﺰـــﯿﻧ ﺖﯿـــﺴ ﯽﻣ هﺪﯾد ،ﺪﻨﺘﺴﻫ ﺎﻫزﻼﮐﻮﯾژﻼﭘ .ﺪﻧﻮﺷ ﮏـﯾاد ﺐﯿﮐﺮﺗ ًﻼﻣﺎـﮐ ﺰـﯿﻧ ﻪـﻘﻄﻨﻣ ﯽـﺘﯾﺮﻟد يﺎـﻫ يﺎﻫﺪـﺣاو ﻪﺑﺎـﺸﻣ ﮓﻨﺳ ﻦﯾا رد .ﺖﺳا ﯽﯾوﺮﺑﺎﮔ ﻪـﺑ زﻼﮐﻮﯾژﻼﭘ ﺎﻫ يﺎـﻫرﻮﻠﺑ ترﻮـﺻ ﻊﻃﺎﻘﺘﻣ و هﺪﯿﺸﮐ ﻞﮑﺷدﻮﺧ ﯽﻣ هﺪﯾد دﻮﺷ ﻪﺑ ﺰﯿﻧ ﺪﻨﻠﺒﻧرﻮﻫ . ترﻮـﺻ و هﺪﺷ هﺪﯾد ﮓﻨﺳ ﻦﺘﻣ رد ﺖﺷرد يﺎﻫرﻮﻠﺑ ﺐﻠﻏا ﻪﺑ ﻦﯿـﺑ ترﻮـﺻ ﻪﻧاد ﯽﻧﺎﮐ ﻦﯿﺑ رد دﻮﺟﻮﻣ يﺎﻀﻓ يا ﭘ ار زﻼﮐﻮﯾژﻼﭘ يﺎﻫ و هدﺮـﮐ ﺮ ﺖـــﻓﺎﺑ و رﻻﻮـــﻧاﺮﮔﺮﺘﻨﯾا ،لﺎﺗﺮـــﺳﺮﺘﻨﯾا ﮏـــﯿﺘﯾﺮﻟد ﺺﺧﺎـــﺷ يﺎـــﻫ بﺎﺳ دﺎﺠﯾا ار ﮏﯿﺘﯿﻓا هدﺮﮐ .ﺖﺳا

ﻞﮑﺷ 3 . A : هاﺮـﻤﻫ لﺎﺗﺮﺳﺮﺘﻨﯾا ﺖﻓﺎﺑ ﺎـﺑ ) ﺖـﯾرﻮﯾد كزﺎـﻧ ﻊـﻄﻘﻣ رد ﺎـﻫزﻼﮐﻮﯾژﻼﭘ ﺪﯾﺪـﺷ ﯽﻧﺎـﺳﺮﮔد XPL ( و B : و ﺎـﻫزﻼﮐﻮﯾژﻼﭘ ﺪﯾﺪـﺷ ﯽﻧﺎـﺳﺮﮔد ﯽﺘﯾﺮﻠﮐ ﺖﯿﺗﻮﯿﺑ نﺪﺷ ﺖـﯾرﻮﯾدﺰﺗراﻮﮐ رد ﺎﻫ ) XPL .( Py ،ﻦـﺴﮐوﺮﯿﭘ : Chl ،ﺖـﯾﺮﻠﮐ : g a Pl ،زﻼﮐﻮـﯾژﻼﭘ : Bio ،ﺖـﯿﺗﻮﯿﺑ : Oq ﯽﻧﺎـﮐ : هﺮـﯿﺗ يﺎـﻫ . ﻢـﯾﻼﻋ يرﺎﺼﺘﺧا زا نارﺎﮑﻤﻫ و ساﻮﻟر و ﻦﺘﻟﺎﻓ و ﻞﻤﮔ

Gemmell and Fulton, 2001; Relvas et al., 2006)

(

Fig. 3. A: Intersertal texture with strong alteration of plagioclase at tin section of diorite (XPL), and B: strong alteration of plagioclase and chloritization of biotites in quartzdiorite rock (XPL). Py: Pyroxene, Chl: Chlorite, Plag: Plagioclase, Bio: Biotite, Oq: Opaque minerals. Abbreviations after Relvas et al. (2006) and Gemmell and Fulton (2001)

ﯽﻠﺻا يﺎﻫﺪﯿﺴﮐا ﯽﻤﯿﺷﻮﺋژ ﺰﯿﻟﺎــﻧآ ﺞﯾﺎــﺘﻧ ﯿﻤﯿــﺷ ﯽﯾﺎ هدزﺎــﯾ ﻪــﻧﻮﻤﻧ ﯽﮕﻨــﺳ ﺖــﯾرﻮﯾد زا و ﺎــﻫ لوﺪـﺟ رد درﻮـﻧﺮﺑ ﻪﻘﻄﻨﻣ يﺎﻫوﺮﺑﺎﮔ 1 ﺖـﺳا هﺪـﻣآ مﺎـﻧ و يراﺬـﮔ ﺎــﺑ ،ﯽﻠــﺻا يﺎﻫﺪﯿــﺴﮐا ﯽﻤﯿــﺷ زا هدﺎﻔﺘــﺳا ﺎــﺑ ﺎــﻬﻧآ ﯽــﺳرﺮﺑ يﺎــﻫ ﯽﻣ نﺎﺸﻧ ﯽﻠﻣﺎﮐ ﯽﮕﻨﻫﺎﻤﻫ ﯽﻓاﺮﮔوﺮﺘﭘ ﺪﻫد ؛ ﻪﺑ يرﻮﻃ سﺎـﺳا ﺮـﺑ ﻪﮐ ﻢﯿﺴﻘﺗ ﮓﻨﺳ يﺪﻨﺑ ﺎﻫ درﻮﻣ ي يﺎﻫﺪﯿـﺴﮐا ﯽﻤﯿـﺷ زا هدﺎﻔﺘـﺳا ﺎـﺑ ﺮﻈﻧ رادﻮــﻤﻧ رد ﯽﻠــﺻا لﺪــﯿﻣ ) ﺖــﺳﻮﻣ Middlemost, 1985 ( ، ﻦــﯾا ﮓﻨﺳ ﻫ وﺮﺑﺎﮔ ،ﺖﯾرﻮﯾد هدوﺪﺤﻣ رد ﺎ - وﺮﺑﺎﮔ و ﺖﯾرﻮﯾد - ﺖﯾرﻮﻧ

(9)

ﺪﻠﺟ 10 هرﺎﻤﺷ ، 2 لﺎﺳ) 1397 ( ﻦﺳ ،ﯽﺠﻨﺳ يژﻮﻟوﺮﺘﭘ ، ﯽﻤﯿﺷﻮﺋژ ﮓﻨﺳ ﻢﺴﯿﺗﺎﻤﮔﺎﻣﻮﻧﻮﺘﮑﺗ و يﺎﻫ ﻂﺳاوﺪﺣ ... 431 1. Metaluminous ﯽﻣ راﺮﻗ ﻞﮑﺷ) ﺪﻧﺮﯿﮔ 5 .( هﺮﺘﺴﮔ 2 SiO ﮓﻨـﺳ رد زا ﻪـﻘﻄﻨﻣ يﺎـﻫ 14 / 52 ﺎـــﺗ 70 / 55 عﻮـــﻤﺠﻣ هﺮﺘـــﺴﮔ ﻦﯿـــﻨﭽﻤﻫ .ﺖـــﺳا ﺪـــﺻرد O 2 O+K 2 Na رﻮﯾد زا ﻪــﻘﻄﻨﻣ يﺎــﻫوﺮﺑﺎﮔ و ﺖــﯾ 33 / 2 ﺎــﺗ 58 / 4 ﺖﺒـﺴﻧ هﺮﺘـﺴﮔ ،ﯽـﻧزو ﺪﺻرد O 2 O/Na 2 K ﮓﻨـﺳ ﻦـﯾا رد يﺎـﻫ زا ﮏﯾزﺎﺑ و ﻂﺳاوﺪﺣ 17 / 0 ﺎﺗ 77 / 0 ﺖﺳا ﺮﯿﻐﺘﻣ . تاﺮـﯿﯿﻐﺗ هﺮﺘﺴﮔ O 2 K زا 43 / 0 ﺎﺗ 47 / 1 ﻪﺑ ﯽﻧزو ﺪﺻرد سﺎﺳا ﺮﺑ .ﺖﺳا هﺪﻣآ ﺖﺳد ﺪﻧﺎــــــﺷ ﺲﯾﺪــــــﻧا ) Shand, 1943 يدﺪــــــﻋ راﺪــــــﻘﻣ ( )) O 2 O+K 2 CaO+Na ( / 3 O 2 Al ﮓﻨــﺳ ،( درﻮــﻧﺮﺑ ﻪــﻘﻄﻨﻣ يﺎــﻫ ﺺﺧﺎﺷ زا ﺮﺘﻤﮐ 1 / 1 هدﻮﺑ ﻦﯿﻣﻮﻟآﺎـﺘﻣ ،ﻦﯾاﺮﺑﺎـﻨﺑ و 1 ﻞﮑـﺷ) ﺪﻨﺘـﺴﻫ 6 ) (

Chappell and White, 2001

.( ﮓﻨـﺳ ،ﻦﯾاﺮﺑﺎــﻨﺑ يﺎــﻫ هوﺮﮔ رد ﻪﻘﻄﻨﻣ ﮏﻟﺎﮐ و ﯽﺘﯿﺌﻟﻮﺗ يﺎﻫ راﺮـﻗ ﻢـﮐ ﻢﯿـﺳﺎﺘﭘ ﺎـﺑ ﻦﻟﺎﮑﻟآ ﯽـﻣ ﻞﮑـﺷ) ﺪــﻧﺮﯿﮔ 7 يور ﺮــﺑ ﻦﯿﯾﺎـﭘ ﻪــﺟرد ﯽﻧﻮـﮔﺮﮔد داﺪــﺧر .( هدﻮﺗ د و ﻪـﻘﻄﻨﻣ يذﻮـﻔﻧ يﺎﻫ و مﺰﯿﺗﺎﻣﻮـﺳﺎﺘﻣ يﺎﻫداﺪـﯾور نآ ﯽـﭘ ر ﯽﻧﺎﮐ ﯽﻧﺎﺳﺮﮔد ﯽﻣ ﺎﻫ ﯽﻤﯿـﺷ يور ﺮـﺑ يدوﺪـﺣ ﺎـﺗ ﺪﻧاﻮﺗ ﮓﻨـﺳ ﺎـﻫ .ﺪـﺷﺎﺑ ﻪﺘﺷاﺬﮔ ﺮﯿﺛﺄﺗ رادﻮـﻤﻧ سﺎـﺳا ﺮـﺑ AFM رﺎـﮔارﺎﺑ و ﻦﯾوﺮـﯾا

(Irvine and Baragar, 1971)

رادﻮــﻤﻧ و O 2 K ﻞــﺑﺎﻘﻣ رد 2 SiO زا رﻮـﻠﯿﺗ و ﻮﻠﯾﺮـﺴﭘ

(Peccerillo and Taylor, 1976)

، ﮓﻨﺳ درﻮﻣ يﺎﻫ ﺮﻈﻧ رد ﺐﻠﻏا هدوﺪﺤﻣ هوﺮﮔ ﯽﺘﯿﺌﻟﻮـﺗ يداﺪـﻌﺗ و هدوﺪﺤﻣ رد ﺰﯿﻧ هوﺮﮔ ﮏﻟﺎﮐ ﻦﻟﺎﮑﻟآ راﺮﻗ ﻪﺘﻓﺮﮔ ﺪﻧا ﻞﮑﺷ) 8 .( ﻞﮑﺷ 4 . ﺪﻨﻠﺒﻧرﻮﻫ و لﺎﺗﺮﺳﺮﺘﻨﯾا ﺖﻓﺎﺑ ﻪﺑ تﺪﺷ نﺎﺳﺮﮔد ﺪﻨﻠﺒﻧرﻮﻫ رد هﺪﺷ ) وﺮﺑﺎﮔ XPL ( . Plag ،زﻼﮐﻮـﯾژﻼﭘ : Url ﻦـﺸﯾﺰﯿﺘﯿﻟاروا : زا يرﺎـﺼﺘﺧا ﻢـﯾﻼﻋ و ساﻮﻟر و ﻦﺘﻟﺎﻓ و ﻞﻤﮔ نارﺎﮑﻤﻫ )

Gemmell and Fulton, 2001; Relvas et al., 2006

(

Fig. 4. Intersertal texture and strongly altered hornblende in hornblende gabbro (XPL). Plag: Plagioclase, Url: Uralitization. Abbreviations after Relvas et al. (2006) and Gemmell and Fulton (2001)

ياﺮﺑ ﺮﯿﺴﻔﺗ تﻻﻮﺤﺗ ﯽﯾﺎـﻤﮔﺎﻣ زا يﺎـﻫرادﻮﻤﻧ تاﺮـﯿﯿﻐﺗ ﺮـﺻﺎﻨﻋ ﯽﻠﺻا ﯽﻋﺮﻓ و رد ﻞﺑﺎﻘﻣ ﺲﯿﻠﯿﺳ هدﺎﻔﺘـﺳا هﺪـﺷ ﺖـﺳا (Harker, 1909) . نﺎﻨﭼ ﻪﮐ ﻞﮑـﺷ رد 9 هﺪـﯾد ﯽـﻣ دﻮـﺷ ، يﺎﻫﺪﯿـﺴﮐا ناﺰـﯿﻣ 3 O 2 MgO, CaO, Al يﺮﺻﺎﻨﻋ و ﻤﻫ نﻮﭽ Ni و Co ﺶﯾاﺰـﻓا ﺎﺑ ﺲﯿﻠﯿﺳ ، ﻣ ﺶﻫﺎﮐ ﯽ ﺪﺑﺎﯾ . رد ﯽﻟﺎﺣ ﻪﮐ ﺮـﺻﺎﻨﻋ يﺎﻫﺪﯿـﺴﮐا عﻮـﻤﺠﻣ ﻦﻟﺎـﮑﻟآ O) 2 O+K 2 (Na و يﺮـﺻﺎﻨﻋ ﻤﻫ نﻮـﭽ Ce, Y, Yb رد ﻞـﺑﺎﻘﻣ ﺶﯾاﺰــﻓا ﺲﯿﻠﯿـﺳ ، ــﻧور ﺪ ﯽـﻣ نﺎــﺸﻧ ار ﯽـﺸﯾاﺰﻓا د ﻦــﯾا .ﺪــﻨﻫ نﺎـﺸﻧ ﺲﯿﻠﯿـﺳ ﻞـﺑﺎﻘﻣ رد بﺎـﯿﻤﮐ و ﯽﻠـﺻا ﺮﺻﺎﻨﻋ تاﺮﯿﯿﻐﺗ د هﺪـﻨﻫ ﮓﻨﺳ ﻪﺑﺎﺸﻣ ﯽﮑﯿﺘﻧژ ﺖﯿﻫﺎﻣ درﻮﻣ يﺎﻫ ﻦﯿﻨﭽﻤﻫ و ﺮﻈﻧ ﺮﮕﻧﺎﯿﺑ ﺪـﻧور يدﺎﻋ ﮓﻨﺳ ﻦﯾا ﻞﯿﮑﺸﺗ رد ﻖﯾﺮﻔﺗ .ﺖﺳﺎﻫ

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ﻞﮑﺷ 5 . هدﻮﺗ ﺖﯿﻌﻗﻮﻣ ﻫ يذﻮﻔﻧ يﺎ ﮏﯾزﺎﺑ و ﻂﺳاوﺪﺣ درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ ، ) ﯽﻠﺻا يﺎﻫﺪﯿﺴﮐا ﯽﻤﯿﺷ سﺎﺳا ﺮﺑ Middelemost, 1985 (

Fig. 5. Location of the Bornaward intermediate and basic intrusives on based of chemistry of major oxides (Middelemost, 1985) ﻞﮑﺷ 6 . ﻪﻔﻟﺆﻣ يﺎﻫ ﯽﻟﻮﻣ A/NK ﺮﺑاﺮﺑ رد A/CNK هدوﺪﺤﻣ ﮏﯿﮑﻔﺗ و ياﺮـﺑ ﻦﻟﺎـﮑﻟآﺮﭘ و ﻦﯿﻣﻮﻟآﺎﺘﻣ ،ﻦﯿﻣﻮﻟآﺮﭘ يﺎﻫ ﮓﻨـﺳ يﺎـﻫ يوﺮﺑﺎـﮔ و ﺖـﯾرﻮﯾد ) درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ

Chappell and White, 2001

(

Fig. 6. Mole parameters of A/NK vs A/CNK and separation of Peraluminous, Metaluminous and Peralkaline fields for the Bornaward dioritic and gabbroic rocks (Chappell and White, 2001)

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لوﺪﺟ 1 . ﯽﯾﺎﯿﻤﯿﺷﻮﺋژ ﺰﯿﻟﺎﻧآ ﺞﯾﺎﺘﻧ ﮓﻨﺳ يﺎﻫ ﻪﻘﻄﻨﻣ يوﺮﺑﺎﮔ و ﺖﯾرﻮﯾد درﻮﻧﺮﺑ ، ﻪﺑ شور XRF و ﯽﻠﺻا يﺎﻫﺪﯿﺴﮐا ياﺮﺑ ICP-MS بﺎـﯿﻤﮐ ﺮﺻﺎﻨﻋ ياﺮﺑ ﯽﮐﺎﺧ ردﺎﻧ و

Table 1. Chemical composition of the Bornaward dioritic and gabbroic rocks using XRF method for major oxides and ICP-MS for trace elements and REE

Sample Roke type BKCh-3 BKCh-31 BKCh-43 BKCh-47 BKCh-129 BKCh-163

Longitude Latitude 57˚ 50΄ 14˝ 35˚ 23΄ 39˝ 57˚ 52΄ 09˝ 35˚ 23΄ 17˝ 57˚ 51΄ 40˝ 35˚ 24΄ 06˝ 57˚ 49΄ 02˝ 35˚ 22΄ 50˝ 57˚ 50΄ 12˝ 35˚ 23΄ 27˝ 57˚ 49΄ 53˝ 35˚ 23΄ 12˝

Petrology Diorite Gabbro Gabbro Gabbro Gabbro Microdiorite

Major Oxides (wt.%) 2 SiO 55.70 54.33 52.70 53.23 54.85 53.27 2 TiO 1.2 0.94 0.92 1.56 0.88 2.38 3 O 2 Al 11.73 11.93 11.85 10.88 11.31 10.11 3 O 2 Fe 10.2 9.59 9.92 12.58 9.32 13.7 MnO 0.19 0.05 0.21 0.22 0.16 0.23 MgO 6.43 7.18 8.96 6.19 7.72 5.73 CaO 8.53 10.7 10.6 10.7 9.55 7.6 O 2 Na 2.62 2.05 1.75 1.97 2.61 2.4 O 2 K 1.4 0.67 0.58 0.77 0.44 0.43 5 O 2 P 0.23 0.14 0.11 0.18 0.11 0.37 L.O.I 1.48 2.01 2.22 1.36 2.45 3.59 Total 99.71 99.59 99.82 99.64 99.40 99.81 Trace elements (ppm) Ba 301 159 140 138 134 99 Cs 1.4 2.1 8.0 0.5 1.7 0.2 Ga 13.3 11.88 14.3 17 16.1 18.4 Nb 1.9 4.21 1.4 2.2 3.3 11.2 Rb 25.1 0.1 17.3 19.5 11.2 12.0 Sr 210.3 48.21 162.4 178.1 209.8 201.8 Ta 0.1 0.14 0.1 0.2 0.3 0.8 Th 0 0 4.0 0 6 6 V 179 143 146 238 144 235 Zr 111.7 72.1 70.3 82.4 93.9 161.1 Y 37 33 21 46 27 53 La 9.0 5.8 4.6 7.3 7.9 14.7 Ce 20.9 14.2 11.1 17.3 17.8 33.1 Pr 2.78 1.78 1.56 2.34 2.39 4.28 Nd 13.6 8.9 7.4 11.4 11.2 22.3 Sm 3.44 2.39 2.57 3.31 3.0 5.35 Eu 1.26 0.9 1.0 1.25 1.15 1.84 Gd 3.77 2.7 3.01 4.0 3.48 5.73 Tb 0.77 0.54 0.56 0.85 0.72 1.14 Dy 4.44 3.07 4.06 5.22 4.30 6.63 Ho 1.05 0.71 0.94 1.16 0.95 1.49 Er 3.22 2.05 2.55 3.37 3.11 4.02 Tm 0.38 0.27 0.35 0.48 0.43 0.56 Yb 2.82 2.12 2.22 3.04 2.85 3.79 Lu 0.45 0.3 0.36 0.48 0.46 0.55 (La/Yb)N 1.40 1.40 1.62 1.87 2.15 2.61 Eu/Eu* 1.04 1.10 1.05 1.09 1.07 1.03

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لوﺪﺟ ﻪﻣادا 1 . ﮓﻨﺳ ﯽﯾﺎﯿﻤﯿﺷﻮﺋژ ﺰﯿﻟﺎﻧآ ﺞﯾﺎﺘﻧ درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ يوﺮﺑﺎﮔ و ﺖﯾرﻮﯾد يﺎﻫ ، ﻪﺑ شور XRF و ﯽﻠـﺻا يﺎﻫﺪﯿﺴﮐا ياﺮﺑ ICP-MS ﺮـﺻﺎﻨﻋ ياﺮـﺑ ﯽﮐﺎﺧ ردﺎﻧ و بﺎﯿﻤﮐ

Table 1 (Continued). Chemical composition of the Bornaward dioritic and gabbroic rocks using XRF method for major oxides and ICP-MS for trace elements and REE

Sample Roke type BKCh-164 BKCh-165 BKCh-169 BKCh-185 BKCh-203 Longitude Latitude 57˚ 49΄ 48˝ 35˚ 23΄ 19˝ 57˚ 49΄ 43˝ 35˚ 23΄ 24˝ 57˚ 49΄ 06˝ 35˚ 23΄ 14˝ 57˚ 48΄ 23˝ 35˚ 23΄ 37˝ 57˚ 46΄ 55˝ 35˚ 21΄ 41˝ Petrology Gabbro Diorite Diorite Microdiorite Diorite Major Oxides (wt.%) 2 SiO 52.14 54.16 54.04 53.4 52.51 2 TiO 0.69 0.28 0.75 2.55 1.66 3 O 2 Al 10.68 13.06 11.42 10.06 13.63 3 O 2 Fe 9.35 7.84 9.34 13.29 11.74 MnO 0.16 0.18 0.18 0.37 0.21 MgO 8.97 10.24 8.56 5.9 3.97 CaO 11.3 7.82 11 8.24 9.23 O 2 Na 2.08 1.8 1.97 2.32 3.11 O 2 K 0.5 1.4 0.59 0.5 1.47 5 O 2 P 0.1 0.04 0.1 0.43 0.49 L.O.I 3.56 2.97 1.75 2.72 1.66 Total 99.53 99.79 99.70 99.45 99.68 Trace elements (ppm) Ba 69 227 159 120 419 Cs 2.2 1.1 2.1 0.4 1.3 Ga 12.8 12.5 13.2 20.1 19.8 Nb 0.9 3.8 1.5 13.8 24.5 Rb 14.3 38.3 15.9 10.8 37.6 Sr 285.0 230.9 238.8 274.3 456.2 Ta 0.1 0.3 0.1 0.9 1.4 Th 4 10 0 0 9 V 136 62 135 245 212 Zr 35.2 88.4 47.5 204.4 140.2 Y 18 42 38 71 32 La 3.8 10.5 4.8 16.7 23.5 Ce 8.5 23.4 10.2 38.6 46.8 Pr 1.24 3.01 1.47 5.13 5.28 Nd 6.5 13.4 6.9 24.9 22.2 Sm 2.03 3.09 2.17 6.66 4.74 Eu 0.73 0.65 0.84 2.22 1.67 Gd 2.25 3.01 2.37 7.53 5.09 Tb 0.48 0.60 0.51 1.47 0.92 Dy 2.69 3.86 3.18 8.32 5.09 Ho 0.63 0.76 0.70 1.81 1.05 Er 1.78 2.50 2.07 5.27 2.81 Tm 0.26 0.32 0.28 0.73 0.39 Yb 1.83 2.13 1.82 4.88 2.59 Lu 0.26 0.33 0.27 0.75 0.39 (La/Yb)N 3.32 1.78 2.31 6.12 1.84 Eu/Eu* 0.65 1.13 0.96 1.04 1.08

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ﻞﮑﺷ 7 . ﺖﯿﻌﻗﻮﻣ ﮓﻨﺳ يﺎﻫ يور ﺮﺑ درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ يوﺮﺑﺎﮔ و ﺖﯾرﻮﯾد ﯽﺜﻠﺜﻣ رادﻮﻤﻧ AFM )

Irvine and Baragar, 1971

(

Fig. 7. The location of Bornaward dioritic and gabbroic rocks on AFM triangles diagram (Irvine and Baragar, 1971)

ﻞﮑﺷ 8 . رادﻮﻤﻧ O 2 K د ﻞﺑﺎﻘﻣ ر 2 SiO ياﺮﺑ يﺮﺳ ﮏﯿﮑﻔﺗ ياﺮﺑ ﯽﮕﻨﺳ يﺎﻫ ﮓﻨﺳ يﺎﻫ ﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ يوﺮﺑﺎﮔ و ﺖﯾرﻮﯾد ر د )

Peccerillo and Taylor,

1976

(

Fig. 8. Diagram of K2O vs SiO2 for separation of Tholeiitic, Calc- alkaline, High K-calc-alkaline and Shoshonite series

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ﻞﮑﺷ 9 . ﺪــﻧور ﺮﯿﯿﻐﺗ تا ــﺴﮐا ﺎﻫﺪـﯾ ي ﺎـــﻨﻋ ﺮـــﺻ ﯽﻠﺻا ، ﺎﯿﻤﮐ و ب ردﺎــﻧ ﮐﺎــﺧ رد ي ﺑﺎــﻘﻣ ل SiO 2 رد ﻨـــﺳ گ ﺎﻫ ي درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ يوﺮﺑﺎﮔ و ﺖﯾرﻮﯾد

Fig. 9. Variations of major oxides, trace elements and REE vs. SiO2 in the Bornaward dioritic and gabbroic rocks

MgO ﯽﻧﺎـــﮐ نﺎﻤﺘﺧﺎـــﺳ رد رﻮـــﻠﺒﺗ ﻦﯿﺘـــﺴﺨﻧ ﻞـــﺣاﺮﻣ رد يﺎـــﻫ فﺮﺼﻣ ﻦﯾﺰﯿﻨﻣوﺮﻓ هﺪﺷ .ﺖﺳا ﻦﯾاﺮﺑﺎـﻨﺑ ، ﺶﯾاﺰـﻓا ﺎـﺑ 2 SiO راﺪـﻘﻣ ، ﯽﻣ ﻪﺘﺳﺎﮐ نآ .دﻮﺷ ﺪﻧور ﻦﯾا ﮓﻨﺳ رد درﻮـﻣ يذﻮﻔﻧ يﺎﻫ ﯽـﺳرﺮﺑ ﻪﺑ ﯽﺑﻮﺧ ﯽﻣ هﺪﯾد دﻮﺷ ﯽﻧﺎﮐ راﺪﻘﻣ ﺶﻫﺎﮐ ﺎﺑ و رد ﻦﯾﺰـﯿﻨﻣوﺮﻓ يﺎﻫ ﮓﻨﺳ ﮔزﺎـﺳ يﺪﯿـﺳا يﺎـﻫ ﯽـﻣ نﺎـﺸﻧ يرﺎ رادﻮـﻤﻧ ﻦﯿـﻨﭽﻤﻫ .ﺪـﻫد تاﺮﯿﯿﻐﺗ CaO ﻞﺑﺎﻘﻣ رد 2 SiO ﺖـﺳا ﯽـﺸﻫﺎﮐ ﺪـﻧور ﺮﮕﻧﺎـﯿﺑ ﺰـﯿﻧ ؛ اﺮــﯾز CaO ــﯿﻟوا ﻞــﺣاﺮﻣ رد ﻪ ﯽﻧﺎــﮐ نﺎﻤﺘﺧﺎــﺳ رد دﺎــﻤﺠﻧا يﺎــﻫ دراو ﺮﺗﻻﺎﺑ ﺖﯿﺗرﻮﻧآ ﺪﺻرد ﺎﺑ زﻼﮐﻮﯾژﻼﭘ و ﺪﻨﻠﺒﻧرﻮﻫ هﺪﺷ ﺖﺳا و ﯽﺸﻫﺎﮐ ﺪﻧور CaO ﻪـﺑ ﺎـﻫزﻼﮐﻮﯾژﻼﭘ ﺐـﯿﮐﺮﺗ ﺶﯾاﺮـﮔ ﺎﺑ ﺖﻤـﺳ راد تﺎـﺒﯿﮐﺮﺗ ﮓﻨــﺳ رد ﺮﺘــﺸﯿﺑ ﺖـﯿﺒﻟآ و ﺮــﺘﻤﮐ ﺖــﯿﺗرﻮﻧآ يا يﺎــﻫ .دراد ﺖﻘﺑﺎﻄﻣ يﺪﯿﺳا

بﺎﯿﻤﮐ ﺮﺻﺎﻨﻋ ﯽﻤﯿﺷﻮﺋژ ﻪﺑ ﯽﮕﻨـﺳ يﺎﻫﺪـﺣاو بﺎـﯿﻤﮐ ﺮـﺻﺎﻨﻋ تاﺮـﯿﯿﻐﺗ يﻮـﮕﻟا ﯽﻠﮐ رﻮﻃ درﻮﻣ ﯽﺳرﺮﺑ رد رادﻮﻤﻧ ﺰﯿﻟﺎﻣﺮﻧ ﯽﺗﻮﺒﮑﻨﻋ هﺪﺷ ﻪـﺑ ﺖﺒﺴﻧ ﺖﯾرﺪـﻨﮐ ) Thompson, 1982 ( ﻢـﻫ ﻪـﺑ ﺖﺒـﺴﻧ يدوﺪـﺣ ﺎﺗ و هدﻮـﺑ ﻪﺑﺎـﺸﻣ ﺰﯿﻣ رد دﻮﺟﻮﻣ توﺎﻔﺗ ﯽﻣ ﺮﻣا ﻦﯾا .ﺖﺳا ﺮﺻﺎﻨﻋ ﻦﯾا ﺰﮐﺮﻤﺗ نا ﺪﻧاﻮﺗ نﺎﺸﻧ ﻪﻧﻮﻤﻧ ﯽﮑﯿﺘﻧژ طﺎﺒﺗرا هﺪﻨﻫد ﺎـﻬﻧآ كﺮﺘـﺸﻣ ﺄـﺸﻨﻣ و ﻢـﻫ ﺎـﺑ ﺎـﻫ ﺪﺷﺎﺑ (Chen et al., 2002) ﻞﮑﺷ) 10 .( ﺮـﺻﺎﻨﻋ رادﻮـﻤﻧ ﻦﯾا رد

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ﺪﻠﺟ 10 هرﺎﻤﺷ ، 2 لﺎﺳ) 1397 ( ﻦﺳ ،ﯽﺠﻨﺳ يژﻮﻟوﺮﺘﭘ ، ﯽﻤﯿﺷﻮﺋژ ﮓﻨﺳ ﻢﺴﯿﺗﺎﻤﮔﺎﻣﻮﻧﻮﺘﮑﺗ و يﺎﻫ ﻂﺳاوﺪﺣ ... 437 1. LILE 2. HFSE ياراد رﺎﮔزﺎـﺳﺎﻧ ﯽﯾﺎـﻧاﻮﺗ كﺮـﺤﺘﻣ و ﻦﯿﯾﺎـﭘ ﯽﻧﻮـﯾ 1 ﺮـﯿﻈﻧ ، K, Rb ﻪﺑ هاﺮﻤﻫ Th ﻪﺑ ﯽـﻨﻏ ﯽـﻠﮐ رﻮـﻃ ﯽـﻣ نﺎـﺸﻧ ﯽﮔﺪـﺷ ا ﻪـﮐ ﺪـﻨﻫد ﻦـﯾ ﯽﻣ عﻮﺿﻮﻣ بوذ ﻦﯿﯾﺎـﭘ تﺎـﺟرد ﻪـﺠﯿﺘﻧ رد ﺪـﻧاﻮﺗ ﺄـﺸﻨﻣ زا ﯽـﺸﺨﺑ ﻪﺘﺷﻮﮔ ا ﻢﺴﯿﺗﺎﻣﻮﺳﺎﺘﻣ ﻪﺘﺷﻮﮔ ﺶﻘﻧ ،ي ﻪﺑ ﯽﮔدﻮﻟآ ،هﺪﺷ داﻮـﻣ ﻪﻠﯿﺳو ﻪﺘﺳﻮﭘ ﮓﻨﺳ ﺪﯿﻟﻮﺗ رد يا .ﺪﺷﺎﺑ ﻪﻘﻄﻨﻣ يﺎﻫ رد ﯽﻟﺎﺣ ﺎـﺑ ﺮـﺻﺎﻨﻋ ﻪـﮐ ﯽﯾﺎﻧاﻮﺗ كﺮـﺤﺘﻣ ﺮﯿﻏ و ﻻﺎﺑ ﯽﻧﻮﯾ Nb ﺎـﺗ Yb ﯽـﻧاواﺮﻓ ،ﺖﺒـﺴﻧ ﻪـﺑ ﯽﻣ نﺎﺸﻧ ار ﯽﻨﯿﯾﺎﭘ ﺒﻤﮐ .ﺪﻨﻫد ﻻﺎـﺑ يراﺪـﯾﺎﭘ ناﺪـﯿﻣ ﺎـﺑ ﺮـﺻﺎﻨﻋ دﻮ 2 ، ﺮﯿﻈﻧ Nb, Ti ﺖﺒـﺴﻧ ﯽﻧﻮﮔﺎـﻧﻮﮔ ﻞـﻣاﻮﻋ ﻪـﺑ ﯽـﻣ هداد (ﻒـﻟا :دﻮـﺷ ﯽﮔﮋﯾو ﺶﻧاروﺮـﻓ ﺪـﻨﯾآﺮﻓ ﺎـﺑ ﻂﺒﺗﺮﻣ ﻢﺴﯿﺗﺎﻤﮔﺎﻣ ) Saunders et

al., 1980; Kuster and Harms, 1998

ب ،( ﻪﺼﺨﺸﻣ ﻪﺟو (

ﯽﯾﺎﻤﮔﺎﻣ يﺎﻫﺪﻨﯾآﺮﻓ رد ﻪﺘﺳﻮﭘ ﺖﮐﺮﺷ )

Kuster and Harms,

1998; Rollinson, 2002 ( و رد ﺮـﺻﺎﻨﻋ ﻦـﯾا ﺮـﻘﻓ ﻪﻧﺎـﺸﻧ (ج بوذ ﯽﻃ رد ﺮﺻﺎﻨﻋ ﻦﯾا يوﺎﺣ يﺎﻫزﺎﻓ يراﺪﯾﺎﭘ ﻦﯿﻨﭽﻤﻫ و ﺄﺸﻨﻣ ﺖـﺳا ﻖـﯾﺮﻔﺗ ﺪـﻨﯾآﺮﻓ ﯽـﻃ رد ﺎﻬﻧآ ﺶﯾاﺪﺟ ﺎﯾ و ﯽﺸﺨﺑ ) Wu et al., 2003 ( ﯽــﻨﻏ ﻦﯿــﻨﭽﻤﻫ . ﯽﮔﺪــﺷ K, Rb و Th و ﺶﻫﺎــﮐ ﺮــﺻﺎﻨﻋ Nb و Ti ﺖــﻓا و بﺎــﯿﻤﮐ ﺮــﺻﺎﻨﻋ يﻮــﮕﻟا رد و يﺎــﻫﺰﯿﺧ يﺎــﻫرادﻮﻤﻧ رد ﺢــﺿاو ﯽــﮔﮋﯾو زا ﯽﺗﻮــﺒﮑﻨﻋ ﮓﻨــﺳ يﺎــﻫ و ﺎــﻫ ﺖﺳا ﺶﻧاروﺮﻓ ﻪﺑ ﻪﺘﺴﺑاو يﺎﻫﺎﻤﮔﺎﻣ ) Wilson, 1989 ( . ﯽﻨﻏ ﯽﮔﺪﺷ ﺮﺻﺎﻨﻋ رﺎﮔزﺎﺳﺎﻧ La , Rb , K , Th , U ﻪﺑ هاﺮـﻤﻫ Pb ﺮﺻﺎﻨﻋ ﯽﻔﻨﻣ ﯽﻟﺎﻣﻮﻧآ و Sr, Ta, Nb, Ti و Ba ﻞﮑﺷ) 11 ( ﺮﮕﻧﺎﯿﺑ ﮏﯾ باﺬﻣ ﻞﺻﺎﺣ ﻪﺘﺳﻮﭘ ﺄﺸﻨﻣ زا ﯽﻬﺗ ﻪﮐ ﺖﺳا يا ﯽﮔﺪـﺷ Sr ﺮﯾﺎﺳ ﻪﺑ ﺖﺒﺴﻧ ﺮـﺻﺎﻨﻋ LILE رد زﻼﮐﻮـﯾژﻼﭘ رﻮـﻠﺒﺗ زا ﯽـﺷﺎﻧ اﺮﯾز ،ﺖﺳا ﻦﯾرﻮﻠﺑ ﻖﯾﺮﻔﺗ ﻦﯿﺣ Sr رد ﻢﯿـﺳﺎﺘﭘ و ﻢﯿـﺴﻠﮐ يﺎـﺟ ﻪـﺑ ﯽـﻣ دراو زﻼﮐﻮــﯾژﻼﭘ ﻪﮑﺒـﺷ .دﻮــﺷ Ba ﻪـﺑ ﺰــﯿﻧ رد ﯽﻨﯿــﺸﻧﺎﺟ ﻞــﯿﻟد ﯿﺑ ﺖﯿﺗﻮ و زﻼﮐﻮﺗرا و ﺮﺼﻨﻋ P ﻪﺑ ﺖـﯿﺗﺎﭘآ ﻞﯿﮑﺸﺗ ﺖﻠﻋ و ﻖـﯾﺮﻔﺗ ﻦﯾا ﯽﻧﺎﮐ ﺎﻫ ﺎﺗ ىدوﺪﺣ ﻰﻟﺎﻣﻮﻧآ ﻰـﻔﻨﻣ هدﺮـﮐ اﺪـﯿﭘ ) ﺪـﻧا Taylor

and McLennan, 1995; Thuy et al., 2004

.( ﯽﻬﺗ ﯽﮔﺪﺷ Nb ﯽﮔﮋﯾو زا ﮓﻨﺳ رﺎﮑﺷآ يﺎﻫ هرﺎـﻗ يﺎﻫ ﺖـﺳا يا . ﯽﻬﺗ ﻦﯾاﺮﺑﺎﻨﺑ ﻪﺘﺷﻮﮔ يﺎﻫﺎﻤﮔﺎﻣ رد ﺮﺼﻨﻋ ﻦﯾا ﯽﮔﺪﺷ ﯽـﻣ يا ﺪـﻧاﻮﺗ ﻪﺘﺳﻮﭘ داﻮﻣ ﺎﺑ ﺎﻫﺎﻤﮔﺎﻣ ﻦﯾا ﺶﯾﻻآ زا ﯽﺷﺎﻧ و دﻮﻌـﺻ لﻼـﺧ رد يا ﻂﯿﺤﻣ رد .ﺪﺷﺎﺑ ﯽﻨﯾﺰﮕﯾﺎﺟ ﻪﺘﺳﻮﭘ ﺶﻧاروﺮﻓ يﺎﻫ ﺮـﯾز ﻪـﺑ ﯽﺳﻮﻧﺎﯿﻗا هرﺎﻗ ﻪﺘﺳﻮﭘ رد ﻞـﯿﺗور و ﺖﯿﻨﻤﻠﯾا ﺪﻨﻧﺎﻣ زاﺪﮔﺮﯾد ﯽﻋﺮﻓ يﺎﻫزﺎﻓ ،يا هدﻮـﺑ راﺪـﯾﺎﭘ هﺪـﻧوروﺮﻓ ﯽﻧﻮـﮔﺮﮔد ﯽﺳﻮﻧﺎﯿﻗا ﻪﺘﺳﻮﭘ ﺪـﻧا ، ﻪـﺠﯿﺘﻧ رد ﺮـﺻﺎﻨﻋ HFSE ﺪــﻨﻧﺎﻣ Nb و Ti ﯽــﻣ ﻪـﮕﻧ دﻮــﺧ رد ار ﺎــﺑ و ﺪــﻧراد ﻊﺑﺎــﻨﻣ ﻦـﯾا زا ﻞـﺻﺎﺣ يﺎـﻤﮔﺎﻣ رد ﺎـﻬﻧآ ﺖﮐرﺎـﺸﻣ زا يﺮﯿﮔﻮـﻠﺟ ، ﻟﺎﻣﻮﻧآ دﺎﺠﯾا ﺐﺒﺳ ﯽﻣ ﺎﻤﮔﺎﻣ رد ﺎﻬﻧآ ﯽﻔﻨﻣ ﯽ ﺪﻧﻮـﺷ ) Rollinson,

2002; Bogoch et al., 2002; Nagudi et al., 2003

( . ﻞﮑﺷ 10 . رادﻮﻤﻧ ﯽﺗﻮﺒﮑﻨﻋ بﺎﯿﻤﮐ و ﯽﺋﺰﺟ ﺮﺻﺎﻨﻋ ﺰﯾﻻﺎﻣﺮﻧ ﺖﯾرﺪﻨﮐ ﻪﺑ ﺖﺒﺴﻧ هﺪﺷ ياﺮﺑ ﮓﻨﺳ يﺎﻫ وﺮﺑﺎﮔ و ﺖﯾرﻮﯾد ي ) درﻮﻧﺮﺑ Wood et al, 1979 (

Fig. 10. Trace elements and REE spider diagram of the Bornaward dioritic and gabbroic rocks normalized to primitive mantle (Wood et al, 1979)

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1. REE 3. Fractional crystallization

2. LREE 4. HREE ﻞﮑﺷ 11 . ﺰﯾﻻﺎﻣﺮﻧ رادﻮﻤﻧ بﺎﯿﻤﮐ ﺮﺻﺎﻨﻋ هﺪﺷ ﯽﮐﺎﺧ ردﺎﻧ و ياﺮﺑ ﻪﯿﻟوا ﻪﺘﺷﻮﮔ ﻪﺑ ﺖﺒﺴﻧ ﮓﻨـﺳ يﺎـﻫ ﺖـﯾرﻮﯾد ) درﻮـﻧﺮﺑ ﻪـﻘﻄﻨﻣ يوﺮﺑﺎـﮔ و Boynton, 1984 ( Fig. 11. Normalized diagram of trace elements and REE vs. primitive mantle for the Bornaward dioritic and gabbroic rocks (Boynton, 1984) ﯽﮐﺎﺧ ردﺎﻧ ﺮﺻﺎﻨﻋ ﯽﻤﯿﺷﻮﺋژ 1 ﺖﯾرﻮﯾد ردﺎـﻧ ﺮـﺻﺎﻨﻋ ﯽﻧاواﺮﻓ ﺮﻈﻧ زا درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ يﺎﻫوﺮﺑﺎﮔ و ﺎﻫ ﮏﺒﺳ ﯽﮐﺎﺧ 2 ﻦﯿﮕﻨـﺳ و 3 ﯽـﻨﻏ نﺎـﺸﻧ ﯽﮔﺪـﺷ ـﻣ ﯽ د ) ﺪـﻨﻫ 12 / 6 - 40 / 1 = N (La/Yb) و 81 / 75 - 26 / 12 = N La رد .( ﻦﯾا ،طﺎـﺒﺗرا ﺮﺼﻨﻋ Eu ﻪﺑ ﯽﻟﺎﻣﻮﻧآ ،درﻮﻣ ﮏﯾ رد ﺰﺟ نﺎـﺸﻧ ﯽﻔﯿﻌـﺿ ﯽـﻔﻨﻣ يﺎﻫ ﯽﻣ ) ﺪﻫد 13 / 1 - 65 / 0 Eu/Eu*= ﯽـﻔﻨﻣ ﯽﻟﺎـﻣﻮﻧآ ﻦﯾﺮﺘـﺸﯿﺑ .( Eu ﻪﻧﻮﻤﻧ ﻪﺑ طﻮﺑﺮﻣ BKCh-165 ﻞﮑـﺷ) ﺖـﺳا 12 ﯽـﻔﻨﻣ ﯽﻟﺎـﻣﻮﻧآ .( Eu اﺪﺟ ﺮﺛا رد زا تﺎﭙـﺳﺪﻠﻓ نﺪﺷ ﮏﯿـﺴﻠﻓ باﺬـﻣ ، ﻪـﺑ ﻪـﭼ ﻪﻠﯿـﺳو ﻪﺑ ﻪﭼ و ﺎﻤﮔﺎﻣ رﻮﻠﺒﺗ ﻦﯿﺣ رد يرﻮﻠﺑ ﻖﯾﺮﻔﺗ بوذ ﺖـﻠﻋ ﻪـﮐ ﯽـﺸﺨﺑ ﯽﻣ ﯽﻗﺎﺑ ﻪﻟﺎﻔﺗ رد تﺎﭙﺳﺪﻠﻓ نآ رد ﺪﻧﺎﻣ ، ﯽﻣ ترﻮﺻ دﺮﯿﮔ ؛ ﻦﯾا اﺮﯾز ﻢﯿـﺳﺎﺘﭘ تﺎﭙـﺳﺪﻠﻓ و زﻼﮐﻮـﯾژﻼﭘ رد ﯽـﺘﯿﻓﺮﻇ ود ﺖـﻟﺎﺣ رد ﺮﺼﻨﻋ .ﺖﺳا رﺎﮔزﺎﺳ عﻮﻤﺠﻣ REE ﻪﻧﻮﻤﻧ ﻦﯾا رد زا ﺎﻫ 98 / 32 ﺎﺗ 97 / 124 ﺮﯿﻐﺘﻣ .ﺖـﺳا ﺐﻠﻏا ﯽﻧﺎﮐ رد زا ﯽﯾﻻﺎـﺑ ﺰـﮐﺮﻤﺗ ،ﻦﻔـﺳا و ﻦﮐﺮـﯾز ،ﺖـﯿﺗﺎﭘآ يﺎﻫ ﺮﺻﺎﻨﻋ Sm و Nd ﯽﻣ ار ناﻮـﺗ .ﺪـﯾد رد ﺖـﯾرﻮﯾد يﺎـﻫوﺮﺑﺎﮔ و ﺎـﻫ ﺶﯿﭘ درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ ﯽﻣ ﯽﻨﯿﺑ ﯽﻧﺎﮐ ﻦﯾا ﻪﮐ دﻮﺷ لﺎـﻘﺘﻧا ﺎﻫ هﺪـﻨﻫد يﺎـﻫ ﻦﯾا ﯽﻠﺻا ﺮﺼﻨﻋ ود ﺪﻨﺷﺎﺑ . ﻦﯾا ﯽﮔﮋﯾو يﺎﻫ دﺎﯾ ﺮـﺻﺎﻨﻋ ياﺮـﺑ هﺪﺷ ﺎﺸﻧ ﺖﺳا ﻦﮑﻤﻣ ﯽﮐﺎﺧ ردﺎﻧ ن ﻪـﮐ ﺪـﺷﺎﺑ ﯽﯾﺎـﻤﮔﺎﻣ ﻞـﻣﺎﮑﺗ هﺪـﻨﻫد ﺐﻠﻏا ﻪﺑ ءﺰﺟ ﻪﺑ ءﺰﺟ رﻮﻠﺒﺗ ﻪﻠﯿﺳو 4 ﯽﻣ لﺮﺘﻨﮐ دﻮﺷ . نﺎﻨﭼ ﻞﮑﺷ رد ﻪﮐ 12 ﯽﻣ هﺪﯾد ،دﻮﺷ يﻮﮕﻟا ﺮﺻﺎﻨﻋ ردﺎـﻧ ﯽﮐﺎـﺧ ﻪﻧﻮﻤﻧ يﺎﻫ ًﺎﺘﺒـﺴﻧ يﺎﻫﺪـﻧور ،ﯽـﺳرﺮﺑ درﻮـﻣ نﺎـﺸﻧ دﻮـﺧ زا يزاﻮـﻣ ﯽﻣ ﯽﻣ ﻪﮐ ﺪﻨﻫد ﻦﯿـﺣ رد ﯽﯾﺎـﻤﮔﺎﻣ يﺎﻫﺪﻨﯾآﺮﻓ ﻪﺑﺎﺸﺗ ﺮﮕﻧﺎﯿﺑ ﺪﻧاﻮﺗ ﺷﺎﺑ ﺎﻬﻧآ ﻞﯿﮑﺸﺗ .ﺪ رادﻮﻤﻧ ﻪﯾﺎﭘ ﺮﺑ ،عﻮﻤﺠﻣ رد REE ﻞﮑـﺷ) 12 ،( ﺐﻠﻏا ﻪﺑ) ﺮﺻﺎﻨﻋ ﻦﯾا هﮋﯾو LREE ﯽﻨﻏ ﺖﯾرﺪﻨﮐ ﻪﺑ ﺖﺒﺴﻧ ( ﯽﮔﺪﺷ ﯽﻣ نﺎﺸﻧ و ﯽـﻓاﺮﮔوﺮﺘﭘ تﺎﻌﻟﺎﻄﻣ ﺞﯾﺎﺘﻧ ﺎﺑ ﺮﺻﺎﻨﻋ ﻦﯾا ﯽﺳرﺮﺑ .ﺪﻨﻫد ﯽﻣ نﺎﺸﻧ ﯽﺑﻮﺧ يرﺎﮔزﺎﺳ ،بﺎﯿﻤﮐ و ﯽﻠﺻا ﺮﺻﺎﻨﻋ ﯽﻤﯿﺷ .ﺪﻫد ﯽﻧﺎﮐ و ﺖﯿﺗﺎﭘآ ﯽﻧﺎﮐ ﻪﻠﻤﺟ زا ﮏﭘوا يﺎﻫ ﮓﻨـﺳ ﯽـﻋﺮﻓ يﺎﻫ ـﻫ يﺎ ﯽﻣ بﻮﺴﺤﻣ ﯽﺳرﺮﺑ درﻮﻣ ﻪﻘﻄﻨﻣ ﻪـﺑ ؛ﺪﻧﻮـﺷ يرﻮـﻃ زا ﺖـﯿﺗﺎﭘآ ﻪـﮐ ﯽﻧﺎـﮐ ﻪﻠﻤﺟ زا ﯽـﻨﻏ يﺎـﻫ REE يﻻﺎـﺑ ﺮﯾدﺎـﻘﻣ ﺐـﻠﻏا ﻪـﮐ ﺖـﺳا LREE ﯽـﻣ ﺰﮐﺮﻤﺘﻣ دﻮﺧ رد ار ﻦﯾﺪـﺑ .ﺪـﻨﮐ ًﺎﺘﺒـﺴﻧ ﺰـﮐﺮﻤﺗ ﺐـﯿﺗﺮﺗ يﻻﺎﺑ REE ﻪﺑ هﮋﯾو LREE ﮓﻨﺳ ﻦﯾا رد ﻦﯾا ﺰﮐﺮﻤﺗ ﺎﺑ ﻂﺒﺗﺮﻣ ،ﺎﻫ ﺮـﺻﺎﻨﻋ ،عﻮﻤﺠﻣ رد ﻪﺘﺒﻟا .ﺖﺳا ﯽﻧﺎﮐ HREE ـﺴﻧ ﻪـﺑ ﺖﺒ LREE ﮓﻨﺳ ﻦﯾا رد ﻦﯿﯾﺎﭘ ﺰﮐﺮﻤﺗ زا ﺎﻫ ﯽﻣ ﻪﮐ ﺪﻨﺘﺴﻫ رادرﻮﺧﺮﺑ يﺮﺗ ﺪﻧاﻮﺗ بوذ ﻦﯿﯾﺎﭘ ﻪﺟرد ﻪﺠﯿﺘﻧ يﺪﺣ ﺎﺗ .ﺪـﺷﺎﺑ ﺎـﻤﮔﺎﻣ ﯽﮔدﻮـﻟآ و ﯽـﺸﺨﺑ ﻦﯿﮑـﺳﺎﻫ ) نارﺎـﮑﻤﻫ و Hoskin et al., 2000 رد ﯽـﺋﺰﺟ ﺮـﻌﻘﺗ ( ﯽـﻬﺗ زا ﯽـﺷﺎﻧ ار ﯽﮐﺎـﺧ ردﺎـﻧ ﺮـﺻﺎﻨﻋ يﺎﻫﻮﮕﻟا ﯽﮔﺪـﺷ MREE

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ﺪﻠﺟ 10 هرﺎﻤﺷ ، 2 لﺎﺳ) 1397 ( ﻦﺳ ،ﯽﺠﻨﺳ يژﻮﻟوﺮﺘﭘ ، ﯽﻤﯿﺷﻮﺋژ ﮓﻨﺳ ﻢﺴﯿﺗﺎﻤﮔﺎﻣﻮﻧﻮﺘﮑﺗ و يﺎﻫ ﻂﺳاوﺪﺣ ... 439 1. ICP-MS ﯽﻣ ﺪﻨﻠﺒﻧرﻮﻫ ﻖﯾﺮﻔﺗ ﻪﺑ ﻪﮐ ﺪﻨﻧاد ﺖﺒـﺴﻧ ﯽـﻣ هداد ﯽـﻨﻏ .دﻮـﺷ ﯽﮔﺪـﺷ ﺮﺻﺎﻨﻋ LREE ﻪﺑ ﺖﺒﺴﻧ MREE و HREE ﯽﻟﺎـﻣﻮﻧآ ﺎـﺑ هاﺮـﻤﻫ ، ﻒﯿﻌﺿ ﯽﻔﻨﻣ Eu ﺪـﻨﯾآﺮﻓ رد زﻼﮐﻮﯾژﻼﭘ و لﻮﺒﯿﻔﻣآ ﻖﯾﺮﻔﺗ ﺮﮕﻧﺎﯿﺑ ﮓﻨﺳ ﻦﯾا ﻞﻣﺎﮑﺗ ﺖﺳﺎﻫ ) Tankut et al., 1998 ( . ﻞﮑﺷ 12 . ﺰﯾﻻﺎﻣﺮﻧ رادﻮﻤﻧ ياﺮﺑ ﺖﯾرﺪﻨﮐ ﻪﺑ ﺖﺒﺴﻧ ﯽﮐﺎﺧ ردﺎﻧ ﺮﺻﺎﻨﻋ هﺪﺷ ﮓﻨﺳ يﺎﻫ رﻮﯾد ﺖﯾ ) درﻮﻧﺮﺑ ﻪﻘﻄﻨﻣ يوﺮﺑﺎﮔ و Boynton, 1984 (

Fig. 12. Normalized diagram of REE vs. Chondrite for the Bornaward dioritic and gabbroic rocks (Boynton, 1984)

ﻦﺳ (يژﻮﻟﻮﻧوﺮﮐﻮﺋژ) ﯽﺠﻨﺳ ﺖـﯾرﻮﯾد ﺎـﺑ ﻪـﻘﻄﻨﻣ يﺎـﻫ زا هدﺎﻔﺘﺳا ) ﻦﮐﺮﯾز U-Pb ( ياﺮــﺑ ﺖــﯾرﻮﯾد ﻖــﻠﻄﻣ ﻦــﺳ ﻪــﺑ ﯽﺑﺎﯿﺘــﺳد يﺎــﻫ درﻮــﻧﺮﺑ ﻪــﻘﻄﻨﻣ ﻦﮐﺮﯾز يﺎﻫ ﮓﻨﺳ ﻦﯾا ﺎﻫ ﯽﺳرﺮﺑ ﺪﺷ . ﻦﮐﺮﯾز درﻮﻣ يﺎﻫ ﯽﺳرﺮﺑ ﺎﺑ ﯽﻧﺎـﮐ ﺮـﮕﯾد زا ﺖـﯿﺘﻨﮕﻣ و مرﻮـﻓﻮﻣوﺮﺑ ﻦﯿﮕﻨﺳ ﻊﯾﺎﻣ زا هدﺎﻔﺘﺳا ﺎـﻫ اﺪﺟ ﺪﺷ ه ﺪﻧا . ﺐﻠﻏا ﻦﮐﺮﯾز يﺎﻫ ﯽﺳرﺮﺑ ﺪﻨﺘـﺴﻫ ﻪـﻧاد ﺖـﺷرد هﺪﺷ ؛ ﻪﺑ يرﻮﻃ لﻮﻃ هزاﺪﻧا ﻪﮐ ﺎﻬﻧآ 100 -200 يﺎﻨﻬﭘ و نوﺮﮑﯿﻣ 70 -120 ﯽﻣﺮﺑرد ار نوﺮﮑﯿﻣ ﮔ ﻞﮑﺷ) دﺮﯿ 13 .( ﻦﮐﺮﯾز درﻮـﻣ يﺎـﻫ ﯽـﺳرﺮﺑ ﺐﻠﻏا هدﻮﺑ ﻢﻟﺎﺳ ﻪﺘـﺴﮑﺷ فﺮـﻃ ﮏـﯾ زا ﺰـﯿﻧ ﯽـﺧﺮﺑ و ﮓـﻧر .ﺪـﻧا ﺐﻠﻏا ﺻ ﺎﻬﻧآ فﺎﻔﺷ ﯽﺗرﻮ ﺖﺳا ﻪـﻠﯿﻣ ﯽـﺧﺮﺑ ،ﻞﮑـﺷ ﺮـﻈﻧ زا . و يا ﯽﺧﺮﺑ ﺪﻨﺘﺴﻫ ﻢﯿﺨﺿ . ﻪﻧاد ﺰﯿﻟﺎﻧآ ﯽـﻣ نﺎـﺸﻧ ﻦﮐﺮـﯾز يﺎـﻫ ﺪـﻫد ﻪـﮐ ) مﻮﯿﻧاروا راﺪﻘﻣ U زا ( 63 ﺎﺗ ppm 1052 ) ﻢﯾرﻮـﺗ راﺪﻘﻣ و Th زا ( 30 ﺎﺗ ppm 915 ﺖﺒـﺴﻧ ﻦﯿـﻨﭽﻤﻫ .ﺖـﺳا ﺮﯿﻐﺘﻣ U/Th هﺮﺘـﺴﮔ رد 9 / 0 ﺎﺗ 6 / 2 ﯽﻣ راﺮﻗ لوﺪﺟ) دﺮﯿﮔ 2 (. ﺐـﺳﺎﻨﻣ يراﺰـﺑا ﺖﺒـﺴﻧ ﻦـﯾا ياﺮﺑ ﻦﯿـﯿﻌﺗ ﺖـﺳا ﺰـﻧژوﺮﺘﭘ ؛ ﻪـﺑ اﺮـﯾز لﻮـﻤﻌﻣ رﻮـﻃ ﺖﺒـﺴﻧ ﻦـﯾا رد ﻦﮐﺮﯾز زا ﺶﯿﺑ ﯽﻧﻮﮔﺮﮔد يﺎﻫ 5 ﺎﺗ 10 ﻦﮐﺮﯾز رد و ﻦـﯾرذآ يﺎـﻫ زا ﺮــﺘﻤﮐ 5 .ﺖــﺳا ﻦﮐﺮــﯾز رد ﺖﺒــﺴﻧ ﻦــﯾا يﺎــﻫ ﯽــﺳرﺮﺑ هﺪــﺷ نﺎﺸﻧ ﻦﮐﺮﯾز ﯽﮑﯿﺗﺎﻤﮔﺎﻣ ﺖﯿﻫﺎﻣ هﺪﻨﻫد هاﺮـﻤﻫ ﯽـﮔﮋﯾو ﻦﯾا .ﺖﺳﺎﻫ ﺎﺑ بوذ ﻪـﻄﻘﻧ تراﺮـﺣ ﻪـﺟرد ﯽـﻣ هزﺎـﺟا ﺎـﻣ ﻪـﺑ ﻦﮐﺮـﯾز ﺎـﺗ ﺪـﻫد تﺎﻋﻼﻃا U-Pb ﻪﺑ ﻦـﯾرذآ هدﻮـﺗ رﻮﻠﺒﺗ ﻦﺳ هﺪﻨﯾﺎﻤﻧ ار هﺪﻣآ ﺖﺳد ) ﻢﯿﻧاﺪﺑ Karimpour et al., 2013 .( ﺎﺘﻧ ﺞﯾ ﻟﺎﻧآ ﺰﯿ مﻮﯿﻧاروا ﯽﯾﺎﯿﻤﯿﺷ يور ﺮﺑ بﺮﺳ 14 ﺰـﮐﺮﻣ زا ﻪﻄﻘﻧ و 22 زا ﻪﻄﻘﻧ ﺷﺎﺣ ﻪﯿ ز ﻦﮐﺮﯾ يﺎﻫ بﺎﺨﺘﻧا زا هﺪﺷ ﮏﯾ ﻪﻧﻮﻤﻧ ﺖﯾرﻮﯾد (رﺎـﻨﮑﺗ نوز ﺰـﮐﺮﻣ) درﻮـﻧﺮﺑ ﻪﻘﻄﻨﻣ هرﺎﻤـﺷ ﻪـﺑ BKCh-03 ياﺮـﺑ هزاﺪﻧا يﺮﯿﮔ ا پﻮﺗوﺰﯾ يﺎﻫ U-Th-Pb لوﺪﺟ رد 2 ﺖﺳﺮﻬﻓ هﺪـﺷ ﻦﺳ .ﺖﺳا ﻦﮐﺮـﯾز ﯽﺠﻨـﺳ نوﺮـﮐرﺰﯿﻟ ﯽﻫﺎﮕـﺸﯾﺎﻣزآ ﺰـﮐﺮﻣ رد ﺎـﻫ هداد .ﺪﺷ مﺎﺠﻧا ﺎﻧوﺰﯾرآ ﯽﭘﻮﺗوﺰﯾا يﺎﻫ U-Pb ﺑ ﻢﺘـﺴﯿﺳ زا هدﺎﻔﺘﺳا ﺎ يرﺰﯿﻟ ﺐﯾﺮﺨﺗ ArF ﺪـﯾﺪﺟ جﻮـﻣ ﺎﺑ 193 ﮏـﯾ ﺎـﺑ هاﺮـﻤﻫ ﺮﺘﻣﻮﻧﺎـﻧ ﯽﻣﺮﺟ ﺮﺘﻣوﺮﺘﮑﭙﺳا -ﯽﯾﺎﻘﻟا ﺎﻤﺳﻼﭘ 1 ﺎـﻧوﺰﯾرآ نوﺮـﮐرﺰﯿﻟ ﺰﮐﺮﻣ رد شور ﻪـﯾﺎﭘ ﺮﺑ ﺢﯿـﺿﻮﺗ يﺎـﻫ نارﺎـﮑﻤﻫ و ﺰـﻟﺮﻬﮔ ﻂـﺳﻮﺗ هﺪـﺷ هداد ) Gehrels et al., 2008 .ﺪــﺷ مﺎــﺠﻧا ( ﻦــﺳ درﻮــﻣ ﺖــﯾرﻮﯾد