Oxygen and carbon isotope patterns archived in shells of the aquatic gastropod Radix: Hydrologic and climatic signals across the Tibetan Plateau in sub-monthly resolution

Taft, Linda; Wiechert, Uwe; Zhang, Hucai; Lei, Guoliang; Mischke, Steffen; Plessen, Birgit; Weynell, Marc; Winkler, Andreas; Riedel, Frank

doi:10.1016/j.quaint.2012.10.031

Cited by 33 publications

(32 citation statements)

References 115 publications

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“…For three of the fi ve modern gastropod shell-water sample pairs, the observed and calculated δ 18 O of water values are within 2‰ of each other-on the order of the annual variation in water O-isotopic values observed in Tibetan lakes by Taft et al (2013). Observed and calculated δ 18 O of water values for the modern (living) gastropod-water sample pair from Drebyur Tsaka creek (DT 10-9-2 and 10-9-3) differed by 4.9‰ (Table 3).…”

Section: Isotopic Results For Holocene To Modern Tufa Gastropod Andmentioning

confidence: 77%

“…Results from a study of modern Tibetan Plateau Radix sp. by Taft et al (2013) suggest that only ~10%-13% of the shell material grows during the winter months, so that the bulk of the shell growth records a warm-season bias of conditions in the preferred shallow-water habitat of the gastropods. Although a few of the gastropod shells record temperatures nominally in excess of predicted maximum summer water temperatures-which would not be explained by habitat preference and seasonally variable shell growth rates-due to the large analytical uncertainties, on January 2, 2015 gsabulletin.gsapubs.org Downloaded from all of the T(Δ 47 ) values agree with estimated summer water temperature within 1 SE.…”

Section: Relationship Between Environmental Temperatures and T(δ 47 )mentioning

confidence: 99%

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High late Miocene–Pliocene elevation of the Zhada Basin, southwestern Tibetan Plateau, from carbonate clumped isotope thermometry

Huntington

Saylor

Quade

et al. 2014

Geological Society of America Bulletin

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The timing and pattern of Tibetan Plateau rise provide a critical test of possible mechanisms for the development and support of high topography, yet views range widely on the history of surface uplift to modern elevations of ~4.5 km. To address this issue we present clumped isotope thermometry data from two well-studied basins in central and southwestern Tibet, for which previous carbonate δ 18 O data have been used to reconstruct high paleoelevations from late Oligocene to Pliocene time. Clumped isotope thermometry uses measurements of the 13 C-18 O bond ordering in carbonates to constrain the temperature [T(Δ 47 )] and δ 18 O value of the water from which the carbonate grew. These data can be used to infer paleoelevation by exploiting the systematic decrease of surface temperature and the δ 18 O value of meteoric water with elevation, provided samples record original depositional conditions and appropriate context exists for interpreting T(Δ 47 ) and δ 18 O values. Previous calcite δ 18 O and δ 13 C values for Oligocene-age marls from the Nima Basin in central Tibet are thought to refl ect original depositional conditions; however, T(Δ 47 ) values exceed Earth-surface temperatures, indicating that the samples have been diagenetically altered. Maximum burial temperatures were not high enough to cause solid-state C-O bond reordering. Instead, the elevated T(Δ 47 ) and water δ 18 O values are consistent with recrystallization of the samples in a rock-buffered system.Miocene-Pliocene aragonitic gastropod shells from the Zhada Basin in southwestern Tibet record primary environmental temperatures, which we interpret in the context of modern shell and tufa T(Δ 47 ) values and lake water temperatures. Modern shell and tufa T(Δ 47 ) values are similar to warmseason water temperatures. The ca. 9-4 Ma shell temperatures are signifi cantly colder, suggesting a 9 ± 3 °C (2σ) average increase in warm-season lake water temperatures since the late Miocene. If the temperature increase is due entirely to elevation change and the modern June-July-August (JJA) surface water lapse rate of 6.1 °C/km applies, it implies >1 km of elevation loss since the late Miocene-Pliocene-corresponding to an average basin fl oor paleoelevation of 5.4 ± 0.5 km (2σ). A warmer mid-Pliocene climate would make this a minimum estimate. Our fi nding of cold paleotemperatures contrasts with previous conclusions based on Pliocene snail shell T(Δ 47 ) data interpreted in the absence of modern shell and water temperature data, but is consistent with δ 18 O-based paleoaltimetry and with paleontological and isotopic data indicating the presence of coldadapted mammals living in a cold, high-elevation climate. We suggest that late Neogene elevation loss across the Zhada Basin catchment probably related to local expression of east-west extension across much of the southern Tibetan Plateau at this time.

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Section: Isotopic Results For Holocene To Modern Tufa Gastropod Andmentioning

confidence: 77%

Section: Relationship Between Environmental Temperatures and T(δ 47 )mentioning

confidence: 99%

High late Miocene–Pliocene elevation of the Zhada Basin, southwestern Tibetan Plateau, from carbonate clumped isotope thermometry

Huntington

Saylor

Quade

et al. 2014

Geological Society of America Bulletin

View full text Add to dashboard Cite

show abstract

“…Stable δ 13 C CH 4 and δ 18 O isotope ratios of carbonate cements were determined according to Taft et al (2013). The TOC contents were analyzed using a LECO CNS-2000 elemental analyzer, and RockEval parameters using a Rock-Eval 6 instrument.…”

Section: Methodsmentioning

confidence: 99%

From shale oil to biogenic shale gas: retracing organic-inorganic interactions in the Alum Shale (Furongian-Lower Ordovician) in southern Sweden

et al. 2015

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“…Consequently, shells of different size and different ontogenic stages are found in the sediments. Such shells have different isotope signatures because of variations in the d 13 C of DIC and d 18 O of water, and water temperature, during the year (Taft et al 2012(Taft et al , 2013. Although all the shells selected for isotope analyses, except Lymnaea sp., belonged to adult individuals of equal size for each species, each shell was weighed and the weight was related to the isotope values (Electronic Supplementary Material [ESM] Table 1).…”

Section: Intra-sample Variability In D 13 C and D 18 O Values Of Mollmentioning

confidence: 99%

Within-sample variability of δ13C and δ18O values of freshwater gastropod shells and the optimum number of shells to measure per sediment layer in the Paddenluch palaeolacustrine sequence, Germany

2015

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This study aimed to: (1) investigate intrasample variability in the stable isotope composition (d 13 C and d 18 O values) measured in several individual mollusc shells; and (2) determine the optimum number of individual mollusc shells required to obtain stable isotope values representative of the mean climate signal for a sediment sample. Seven hundred and six gastropod shells were analysed, representing eight species. These eight species were most abundant and consistently present in the sediment sequence of the Paddenluch outcrop, Brandenburg, northeast Germany. Significant differences between minimum and maximum d 13 C and d 18 O values of the shells were recorded within all sediment samples and for all analysed species. Within the sediment samples, the greatest mean variability in both d 13 C and d 18 O values was found for Hippeutis complanatus, 5.84 and 5.23 %, respectively. The greatest intra-specific variability in C and O isotope values within individual sediment samples, however, was 10.2 and 6.8 %, respectively. Significant differences between minimum and maximum d 13 C and d 18 O values of individual mollusc shells within the same sediment sample are probably the result of population isotope variability, variations in species life span, thickness of the sediment sample, sediment accumulation rate, and environmental fluctuations during the time span when the sediment was deposited. Shells were randomly selected to determine the optimum number of shells necessary to obtain stable isotope values that are representative of the mean climate signal, from a 1-cm sample of sediment. For each layer of the Paddenluch sediment sequence, 15 or more shells (N C 15) was the required sample size to provide representative isotope values and yield a reliable mean isotope value. Sample sizes with fewer shells displayed more variable mean d 13 C and d 18 O values. Stable isotope composition of the analyzed molluscs was speciesspecific, with differences in mean d 13 C and d 18 O values of 2.5 and 3 %, respectively. This illustrates the need to use mono-specific samples throughout a sediment sequence to generate reliable data.Electronic supplementary material The online version of this article

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Oxygen and carbon isotope patterns archived in shells of the aquatic gastropod Radix: Hydrologic and climatic signals across the Tibetan Plateau in sub-monthly resolution

Cited by 33 publications

References 115 publications

High late Miocene–Pliocene elevation of the Zhada Basin, southwestern Tibetan Plateau, from carbonate clumped isotope thermometry

High late Miocene–Pliocene elevation of the Zhada Basin, southwestern Tibetan Plateau, from carbonate clumped isotope thermometry

From shale oil to biogenic shale gas: retracing organic-inorganic interactions in the Alum Shale (Furongian-Lower Ordovician) in southern Sweden

Within-sample variability of δ13C and δ18O values of freshwater gastropod shells and the optimum number of shells to measure per sediment layer in the Paddenluch palaeolacustrine sequence, Germany

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