1989
DOI: 10.2136/sssaj1989.03615995005300010037x
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The Stable Isotope Chemistry of Pedogenic Carbonates at Kyle Canyon, Nevada

Abstract: The C and O isotopic composition and radiometric ages of laminar pedogenic CaCO3 coatings were examined in limestone‐derived alluvium along an elevational and climatic transect of the Mojave Desert of Nevada. The δ13C of the soil CO2 decreased with increasing elevation and was related to plant density and available soil moisture. Laminar pedogenic carbonate coats which formed on the bottoms of clasts were separated into inner and outer laminae. The δ13C of carbonates in the outer laminae decreased with increas… Show more

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Cited by 94 publications
(58 citation statements)
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“…However, in arid environments pollen is vulnerable to degradation and packrat middens are preserved in only a limited range of environments, whereas calcic soils available for stable carbon and oxygen isotopic analysis are almost ubiquitous (Cerling, 1984;Amundson et al, 1989;Quade et al, 1989;Kelly et al, 1991). In this locality, the arid climate combined with the eolian processes along the Tularosa and Hueco basin floors precluded pollen preservation.…”
Section: Settingmentioning
confidence: 87%
“…However, in arid environments pollen is vulnerable to degradation and packrat middens are preserved in only a limited range of environments, whereas calcic soils available for stable carbon and oxygen isotopic analysis are almost ubiquitous (Cerling, 1984;Amundson et al, 1989;Quade et al, 1989;Kelly et al, 1991). In this locality, the arid climate combined with the eolian processes along the Tularosa and Hueco basin floors precluded pollen preservation.…”
Section: Settingmentioning
confidence: 87%
“…Previous studies on soil CO*, and 6 13C values of soil CO*, and pedogenic carbonates indicate that the CO1 and carbonate in a soil system are in isotopic equilibrium. This implies that any detrital carbonate dissolved in the soil is overwhelmed by soil CO2 and the isotopic composition of pedogenic carbonate is determined by the isotopic composition of soil CO2 ( CERLING, 1984, 199 1;CERLING et al, 1989;QUADE et al, 1989;AMUNDSON et al, 1989;CER-LING and QUADE, 1992). If this is the case, the 14C content of pedogenic carbonate should also be determined by 14C content of soil CO2 and inherited dead carbon should not affect the age of soil pedogenic carbonate.…”
mentioning
confidence: 99%
“…In (C) thick sequences of carbonate laminations (c) exist, but are accompanied by pits (p) suggesting dissolution/reprecipitation. carbonate and detrital grains [27,31]. The deposition of the dense laminations appears to exclude the inclusion of non-pedogenic minerals, particularly silicates.…”
Section: Pedogenic Carbonate Formationmentioning
confidence: 97%
“…Pedogenic carbonate forms in isotopic equilibrium with the CO 2 present at a given soil depth [6,7,27]. Therefore, if the isotopic composition of soil CO 2 is known, the composition of the carbonates can easily be calculated using equilibrium fractionation factors.…”
Section: I4c Content Of Soil Co 2 and Carbonatementioning
confidence: 99%