Weathering rates
Mineral weathering rates calculated from spring water data: a case study in an area with intensive agriculture, the Morais Massif, northeast Portugal
... of weathering reactions and their rates in an area with ultramafic rocks, amphibolites, gneisses and micaschists; the area is partly occupied by natural vegetation, but is for a greater part cultivated to ...
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Soil weathering rates in 21 catchments of the Canadian Shield
... Mg weathering rates (Table ...by weathering soil pro- file ...the weathering of the whole soil profile based on the fact that the till deposit is relatively shallow for these types of ...the ...
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Role of fractures in weathering of solid rocks: narrowing the gap between laboratory and field weathering rates
... field weathering rates is the underestimation of field rates due to BET ...log rates, but expressed as BET log rates (Table 6 values reduced by ...
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Geochemical signatures and weathering rates in soils derived from different granites in contrasting climatic locations
... including weathering patterns and soil fertility ...on weathering rates-the difference in chemical index of alteration is more extreme in the dry ...
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Duration of Weathering Episodes in Small Watersheds: Implication on Plagioclase Weathering Rates
... of weathering is unknown within the springs’ ...plagioclase weathering rates calculated for the springs (filled circles) fit to the initial ...notwithstanding weathering is continuously ...
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Hydrochemistry, weathering and weathering rates on Madeira island
... the weathering reactions and coefficients accounting for unconstrained contributions, B is the vector with a water composition, and X is the set of mole fractions of dissolved primary minerals plus the residual ...
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From Hydrochemistry to Chemical Weathering: Models and Problems
... estimate rates of chemical weathering of ...by weathering, characterized by bicarbonate (B) and dissolved silica ...the weathering rates of the different minerals can be ...these ...
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A normalised seawater strontium isotope curve and the Neoproterozoic-Cambrian chemical weathering event
... spreading rates, which determine ocean crust production, are not considered to change erratically over geological time (Rowley, 2002), attempts have been made to use the marine carbonate-based seawater 87 Sr/ 86 ...
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Weathering of plagioclase across variable flow and solute transport regimes
... between weathering rates estimated in the field and in the ...field weathering rates reported in that study were mostly solid-state weathering rates based on the differences ...
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Integrating topography, hydrology and rock structure in weathering rate models of spring watersheds
... Keywords: spring watersheds; hydrology; travel time; surface area; weathering rates; modeling; equilibria; Vouga river basin; THROW model.. Corresponding Author: Dr.[r] ...
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Boron rates for triticale and wheat crops
... The results were submitted to regression analy- sis, adjusting equations to data obtained for rates of bo- ron and adopting interaction through significant F test (α = 0.05) and determining coefficient magnitude ...
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Competitive exchange rates and macroeconomic theory
... interest rates to avoid further devaluation is like the tail wagging the dog and traditional assistance packages combined with restrictive policy prescriptions – or at least an expectation by donors that the ...
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Hysteresis effects under CIR interest rates
... interest rates are high the economy tends to slow down and borrowers will require less ...interest rates have a tendency to decline (mean reversion tends to imply a negative ...interest rates are at ...
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Stock-Flow Adjustments and Interest Rates
... interest rates in many ...interest rates in Ireland and in the UK, while in Greece the crisis reinforced the downward effect of the SFA on the long-term yields (see summary Table ...
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Evolution of the Birth Rates and Infant Mortality Rates between 1990-2007 in Cluj District
... official rates of recent years shows that neonatal mortality represented 60% of the infant mortality, referring to the death of children until the age of one ...
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Fixed-Mobile Substitution and Termination Rates
... termination rates, while others ...tion rates depend on the magnitude of network externalities, the intensity of competition in the mobile sector, and the distribution of customer ...
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Early weathering of palladium gold under lateritic conditions, Maquine Mine, Minas Gerais, Brazil
... The weathering of these Au particles is expressed as rounded shapes and sur®cial pits, similarly to the morphological fea- tures described elsewhere in laterites as reported above in the ...
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Estimation of mutation rates at Y-STRs
... We should however remark that marker DYS385 had a different analysis approach due to the inability to assign neither fragment to a defined locus thus, rendering it impossible to determine which allele mutated to which. ...
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Economic slowdowns, hazard rates and foreign ownership
... Complementary log-logistic model with piece-wise constant hazard rates and Inverse Gaussian unobserved heterogeneity. Models 1–5 correspond to the same specifications presented in Table 5 , but replacing the ...
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The Heston model under stochastic interest rates
... of the Heston model (1993) with constant interest rates, by Kruse and N¨ogel (2005). I will start by following a similar path but, by using characteristic functions, I simplify the numerical implementation. Even ...
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