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SÍNTESE DOS CENÁRIOS PALEOBIOCLIMÁTICOS DO QUATERNÁRIO TARDIO EM MINAS
GERAIS/SUDESTE DO BRASIL
Synthesis of the Late-Quaternary palaeobioclimatic scenarios in Minas Gerais State/Southeastern
Brazil
Luiz Fernando de Paula Barros
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.C2<R@+'--!:ST'G!!#"!A#+-Chrystiann Lavarini
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Laura Souza Lima
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RESUMO: O presente trabalho apresenta uma tentativa de síntese das contribuições teóricas sobre os cenários
paleobioclimáticos naturais do Quaternário Tardio no Estado de Minas Gerais, sudeste do Brasil, buscando sua relação com eventos climáticos de larga escala. Para tanto, foi feita uma extensa revisão da literatura em periódicos e fontes diversas. Buscaram-se trabalhos com diferentes metodologias, mas que apresentam datações absolutas e cujos resultados possuem implicações paleobioclimáticas.
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Palavras-chave: DC1'0Y':$'A+2,0('2:#$\,H2:(-!:$BC'(,-0?-2!:$"!0(20,0('2:#$E,!"-!0!.!H2'#$]:('1!$1,$
ABSTRACT: In this paper, it was attempted to synthesize the natural palaeobioclimatic scenarios of the Late-Quater-nary in Minas Gerais State, Southeastern Brazil, seeking for their relationship to large-scale climatic events. It was made an extensive literature review. It was looked for papers based on different methods, but with absolute datings and palaeobioclimatic implications. This kind of survey can not set precise time limits. However, some trends could be observed from the available datasets. It was proposed eight palaeobioclimatic scenarios for the last 50,000 years. The greater number of scenarios is usually found in the last 10,000 years. However, this proposal is still open due to concentration of the available data in just some regions, occurring information gaps.
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45[
METODOLOGIA E DADOS UTILIZADOS
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RESULTADOS E DISCUSSÕES
J$"!--,.'YZ!$1,$,K,0(!:$1,$0'(C-,<'$".2A?(27
"'$b$12I"C.('1'$@!-$CA'$:b-2,$1,$R'(!-,:#$X,$'"!-1!$
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CA$,K,0(!$,:@,">I"!)$'::CA201!$CA'$('g'$"!0:('0(,$
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0'$'0?.2:,$@!.>02"'#
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com limites temporais precisos podem ser estabeleci
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455
Cenário 1
a:$ 1'1!:$ @'.20!.kH2"!:$ 12:@!0>K,2:$ @'-'$ !:$
l.(2A!:$[=$w'$JP$M'@-!g2A'1'A,0(,$!$.2A2(,$1'$1'7
('YZ!$-'12!"'-+m02"'N$2012"'A$CA$".2A'$A'2:$:,"!$,$
A'2:$R-2!$BC,$!$'(C'.$'$,:('$b@!"'#$]::,$A!A,0(!$:,-2'$
"'-'"(,-2<'1!$@,.'$1!A20/0"2'$1,$"'A@!:$M,:@,"2'.7
A,0(,$'$L'A>.2'$P!'",',N)$@!-bA$"!A$'$!"!--V0"2'$
de alguma mata galeria com a presença de
Araucaria
MF]QcU&E$d$cUOQi])$6ee5d$c]X\*$,($'.#)$6ee9N#$
O!A$ +':,$ 0'$ '(C'.$ 12:(-2+C2YZ!$ 1':$ @!@C.'Y_,:$ 1,$
campos e
Araucaria)$F,G.20H$,$c2"G(,$M6ee5N$@-!@_,A$
@'-'$,::,$@,->!1!$(,A@,-'(C-':$,0(-,$[$,$5$O$A'2:$
+'2g':$BC,$':$'(C'2:$0'$-,H2Z!$1,$O'(':$J.(':)$@!-YZ!$
",0(-'.$1!$]:('1!#
Cenário 2
a$@,->!1!$:,HC20(,$:,-2'$A'2:$lA21!)$:,HC01!$
c,1-C$,($'.#$M6ee9N)$1,$'"!-1!$"!A$'$!"!--V0"2'$1,$
v!-,:(':$1,$@.'0>"2,$,0(-,$j=$,$35$w'$JP#$&!$-,H2:(-!$
1,$ ,--'$&,H-')$a.2K,2-'$M6ee3N$21,0(2I"'$,0(-,$[=$,$
43$w'$JP$CA$A!:'2"!$v!-,:('.$"!A$('g!0:$2012"'1!-,:$
1,$".2A'$R-2!$,$1,$".2A'$BC,0(,#$ ,HC01!$c,1-C$,($'.#$
M6ee9N)$'@,:'-$1,$:,-,A$:>(2!:$AC2(!$@-kg2A!:$M12:7
('0(,:$A,0!:$1,$3$wAN)$':$AC1'0Y':$0!$"!0WC0(!$1!:$
@k.,0:$0Z!$:Z!$':$A,:A':$,A$ '.2(-,$,$ ,--'$&,H-')$
@!-bA$':$20(,-@-,('Y_,:$@'.,!".2A?(2"':$:Z!$"!A@'7
(>K,2:$:,$.,K'1!:$,A$"!0('$R'(!-,:$"!A!$(!@!H-'I')$
altitude e sedimentologia.
P'-'$ '.H'1!7c'+!C-2'C$,($'.#$M6ee8N$!$@,->7
!1!$,0(-,$49$,$33768$w'$JP$,-'$@!::2K,.A,0(,$1,$CA$
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G!W,$0'$-,H2Z!$:C1,:(,)$"!A$CA'$,:('YZ!$:,"'$A,0!-$
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-,H2:(-!$1'$!"!--V0"2'$1,$+C-2(2<,2-!:$,$!C(-':$?-K!-,:$
(-!@2"'2:#$J$@'-(2-$1,$CA$.,K'0('A,0(!$1!:$-2(A!:$1,$
:,12A,0('YZ!$1,$CA'$.'H!'$0!$(!@!$1'$ ,--'$ Z!$`!:b$
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,K,0(!:$1,$"!.CK2!0'A,0(!$0'$D'0(2BC,2-'$a"21,0('.$
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:,HC01!$@,->!1!$:,"!$MDU *\J$d$Oa\\J)$3==5N#$
]0(-,('0(!)$F,G.20H$d$c2"G(,$M6ee5N$0Z!$A!:7
(-'A$ CA'$ 12K2:Z!$ 0!$ @,->!1!$ ,0(-,$ j8$ ,$ 35$ w'$JP)$
2012"'01!$ '$ A'0C(,0YZ!$ 1':$ "!012Y_,:$ A'2:$ R-2':$
,$ :,"':$ BC,$ ':$ '(C'2:)$ 2012"'1':$ '0(,-2!A,0(,#$ ]A$
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,.,A,0(!:$ '-+k-,!:$ ,$ +'2g'$ 12K,-:21'1,$ 1,$ ,:@!-!:$
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2012"'-2'$@-!K?K,2:$"!012Y_,:$".2A?(2"':$A'2:$:,"':$
BC,$'$'(C'.)$@!2:$'$'C:V0"2'$1,:(,:$,.,A,0(!:$:CH,-,$
BC,$':$?-,':$'.'H'12Y':$,-'A$1,$@,BC,0':$12A,0:_,:#$
]::'$12R,-,0Y'$,0(-,$!$BC'1-!$@-!@!:(!$@!-$F,G.20H$,$
c2"G(,$M6ee5N$,$E!A,:$,($'.#$M3==eN$,$!$'@-,:,0('1!$
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1,$CA21'1,$@'-'$':$@!-Y_,:$!,:(,$,$:C.$1!$]:('1!$,0(-,$
j=$,$35$w'$JP#
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X\*)$6ee4d$c]X\*$,($'.#)$6ee9)$acUp]U\J)$6ee3N#$
Cenário 3
a:$ l02"!:$ -,H2:(-!:$ @!.>02"!:$ ,0(-,$ 35$ ,$ 6e$
w'$JP$12:@!0>K,2:$0!$]:('1!$:Z!$!:$'@-,:,0('1!:$@!-$
F,G.20H$,$c2"G(,$M6ee5N#$ ,HC01!$,:(,:$'C(!-,:$,:(,$
:,-2'$CA$@,->!1!$A'2:$:,"!$BC,$!$'0(,-2!-$,$AC2(!$R-2!)$
!$BC,$(,-2'$.,K'1!$'$CA'$-,(-'YZ!$1,$,:@b"2,:$'-+k-,':)$
"!A!$':$1!$HV0,-!$
Araucaria)$@,-A'0,",01!$!$1!7
A>02!$1,$"'A@!:$MgrasslandsN#$F,G.20H$,($'.# M3==3N$
consideraram a partir de um
core$A'-20G!$0'$R!<$1!$
\2!$X!",$BC,$,:(,$@,->!1!$:,$1,C$,0(-,$46$,$64$w'$JP)$
('A+bA$"!A$"'-'"(,->:(2"':$1,$+'2g':$(,A@,-'(C-':$,$
pouca umidade.
P!'",',$1!A20'A$':$@'-(,:$20R,-2!-,:$1!$@,-I.)$W?$'$
L'A>.2'$OT@,-'",',$b$A'2:$"!ACA$0':$@'-(,:$:C@,7
-2!-,:#$]::,$@'1-Z!$@!1,$:,-$'(-2+C>1!$'$CA$'CA,0(!$
1'$ 12::!.CYZ!$ :,.,(2K'$ 1!:$ I(k.2(!:$ 1!$ (2@!$ OT@,-'7
",',$"!A$'$@-!RC0121'1,)$,;!C$'$CA'$12A20C2YZ!$1,$
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CA'$12A20C2YZ!$0'$:2.2"2I"'YZ!$1,$"b.C.':$+C.2R!-A,:$
MFa\FJ7\a OQ]c$,($'.#$3==9N#$
Cenário 4
,HC01!$c,1-C$M6ee4N$,$c,1-C$,($'.# M6ee9N)$
,0(-,$69$,$66$w'$JP$(,-2'$!"!--21!$CA$'CA,0(!$H-'1C'.$
1,$ CA21'1,$ ,$ ':$ (,A@,-'(C-':$ :,-2'A$ A'2:$ +'2g':#$
*A'$-?@21'$:C",::Z!$1,$12R,-,0(,:$(2@!:$v!-,:('2:$0!:$
l.(2A!:$65$w'$b$20(,-@-,('1'$@!-$,:(,:$'C(!-,:$"!A!$
-,R.,g!$ 1,$ -?@21':$ AC1'0Y':$ ".2A?(2"':#$ a.2K,2-'$
M6ee3N$('A+bA$21,0(2I"'$CA$@,->!1!$lA21!$,$R-,:"!$
!"!--21!$,0(-,$6e)[$,$64)5$w'$JP$,A$c'H!'$1!:$a.G!:)$
!$BC'.$:,-2'$"!A@'(>K,.$"!A$CA$A!:'2"!$1,$v!-,:('$
de dossel mais aberto.
Cenário 5
J$A'2!-2'$1!:$1'1!:$12:@!0>K,2:$2012"'$BC,$'$
@'::'H,A$1!$P.,2:(!",0!$@'-'$!$Q!.!",0!$,A$D20':$
E,-'2:$ R!2$ A'-"'1'$ @!-$ CA$ @,->!1!$ ".2A?(2"!$ A'2:$
:,"!$BC,$!$'(C'.)$!$BC,$b$-,.'"2!0'1!$@!-$c,1-C$M6ee4N$
'!$tYounger Dryasu#$J201'$:,HC01!$'$'C(!-')$0,:(,$
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-,H2:(-!$1,$ '.2(-,)$@-,1!A20'01!$K,H,('YZ!$G,-+?",'#$
,HC01!$F,G.20H$,($'.#$M3==3N)$@-!@!-Y_,:$,.,K'1':$1,$
@k.,0$1,$,:@b"2,:$G,-+?",':$0!:$-,H2:(-!:$-,R,-,0(,:$'!$
@,->!1!$'0(,-2!-$'$6=$w'$2012"'A$CA'$@-,:,0Y'$:2H02I7
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@'-'$'$1!A20/0"2'$1,$"'A@!:$,$R-,Bf,0(,:$BC,2A'1':)$
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2012"'(2K!$1,$"!012Y_,:$".2A?(2"':$:,"':$"!A$+'2g'$
precipitação anual e estação seca de cerca de seis
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&!$,0('0(!)$!$IA$1,:(,$@,->!1!$:,"!$b$+,A$K'-2'1!)$
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JP$0!$c'H!$J.,2g!$M]&i]\ $,($'.#)$3=6=N$,$'$4$w'$JP$
,A$c'H!'$1!:$a.G!:$MacUp]U\J)$6ee3N#
Cenário 6
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BC,0!$@,->!1!$A'2:$lA21!$0!$"!A,Y!$1!$Q!.!",0!#$
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,g@'0:Z!$1!$HV0,-!$Araucaria ,0(-,$e)[$,$8)[$w'$JP$
Mc]X\*)$6ee4N#$&!$-,H2:(-!$'0'.2:'1!$@!-$\!1-2HC,:7
7L2.G!$,($'.#$M3==3N$'$K,H,('YZ!$1,$"'A@!:$1?$.CH'-$
'$CA'$:'K'0'$(-!@2"'.#$J201'$:,HC01!$,:(,:$'C(!-,:)$
,0(-,$ '@-!g2A'1'A,0(,$ e)[$ ,$ 8$ w'$JP$ @,-",+,7:,$
CA'$20(,0:'$:,12A,0('YZ!$,$'C:V0"2'$1,$@k.,0)$!$BC,$
:,-2'$CA'$-,:@!:('$'$CA'$20(,0:'$,-!:Z!$,A$-'<Z!$1'$
CA212I"'YZ!$1!$".2A'#$F,G.20H$M6ee[d$3==4N$('A+bA$
aponta para uma redução da estação seca e aumento do
(!('.$@.CK2!Ab(-2"!)$!$BC,$(,-2'$@,-A2(21!$CA'$,g@'0:Z!$
1':$A'(':$H'.,-2'#$J:$BC,2A'1':$0'(C-'2:$R!-'A$A,0!:$
R-,Bf,0(,:$0,::,$@,->!1!$MF]QcU&E)$6ee[)$3==4N#$
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45e
Cenário 7
*A$0!K!$,K,0(!$:,"!$,$+':('0(,$:'<!0'.$(,-2'$
!"!--21!$,0(-,$8)[$,$[)[$w'$JP$,A$ '.2(-,$,)$@!-$K!.('$
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c]X\*$,($'.#)$6ee9N)$'.bA$1!$'CA,0(!$1,$R-'HA,0(!:$
1,$"'-KZ!$MP] ]&XJ$,($'.#)$3==jN)$(,:(,AC0G'01!$'$
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A,0(!:$1,$"'-KZ!$,0(-,$8)5$,$9)4$w'$JP$0!$c'H!$1'$
HC'$P-,('$1,$F'2g!#$]A$c'H!'$&!K'$,$c'H!$1!$P2-,:$
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Cenário 8
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AGRADECIMENTOS
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@,:BC2:':#$a:$'C(!-,:$('A+bA$:Z!$H-'(!:$'!$-,K2:!-$
por suas contribuições.
REFERÊNCIAS
JF\]*)$D#$c#d$J U )$#$J$2.G'$1,$"'.!-$,A$F,.!$
Q!-2<!0(,x$ CA$ ,:(C1!$ 1,$ "':!#$ U0x$ O!0H-,::!$ F-'7
:2.,2-!$1,$D,(,!-!.!H2')$6=)$6ee8)$F-':>.2'#$
Anais
...
F-':>.2'x$U&D]i; FD)$6ee8#$[$@#$
JcD]UXJ)$ \#D#F#$
Características climatológicas
do regime de chuvas em Minas Gerais#$6ee[#$9j$R#$
X2::,-('YZ!$ MD,:(-'1!N$ $ *02K,-:21'1,$ L,1,-'.$ 1,$
p2Y!:')$p2Y!:')$6ee[#
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`#P#p#$Q!.!",0,$1-T0,::$'01$GCA'0$!""C@'(2!0$20$F-'7
<2.$1C-20H$(G,$tJ-"G'2"$E'@u#$Quaternary Research)$
K#$9j)$@#$3e8$$4=5)$3==[#
F]QcU&E)$ Q#$J$ G2HG$ -,:!.C(2!0$ Q!.!",0,$ @!..,0$
-,"!-1$ R-!A$ c'H!$ 1!$ P2-,:)$ ]$ F-'<2.x$p,H,('(2!0)$
".2A'(,$'01$I-,$G2:(!-T#$Journal of Paleolimnology)$
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