Hominin expansion into Central Asia during the last interglacial

Asmerom, Yemane; Polyak, Victor J.; Wagner, J.; Patchett, P. Jonathan

doi:10.1016/j.epsl.2018.04.059

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…Three small pieces of densely crystalline calcite coating (core C2) were dissolved in 15 N HNO 3 , doped with a 229 Th, 233 U, and 236 U mixed spike, and cleaned and separated U and Th in anion exchange resin column chemistry following the methods of Asmerom et al 92 . Measurements were made on a Thermo-Neptune multicollector inductively coupled plasma mass spectrometer at the Department of Earth and Planetary Sciences, University of New Mexico.…”

Section: Methodsmentioning

confidence: 99%

Combined use of conventional and clumped carbonate stable isotopes to identify hydrothermal isotopic alteration in cave walls

Temovski

Rinyu

Futó

et al. 2022

Sci Rep

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Alteration of conventional carbonate stable isotopes (δ18O, δ13C) in cave walls has been shown to be a useful tool to identify cave formation driven by deep-seated processes, i.e., hypogene karstification. If combined with a prior information on the paleowater stable isotope composition, further insights can be obtained on the temperature and the source of the paleowater. Clumped isotope composition (Δ47) of carbonates is an independent measurement of temperature, and if combined with the conventional stable isotopes, can provide information on the paleowater stable isotope composition. On the example of Provalata Cave (N. Macedonia), we apply for the first time, both conventional and clumped stable isotope analysis, and identify two different isotope alteration trends, reflecting two distinct hydrothermal events: an older, hotter one, where isotope alteration was likely related to isotope diffusion, lowering the δ18O values of the carbonate; and a younger one, related to the cave formation by low-temperature CO2-rich thermal waters, with dissolution-reprecipitation as the alteration mechanism, causing decrease in δ18O values, and unexpected increase in δ13C values. The findings are further corroborated by additional insight from optical petrography and cathodoluminescence microscopy, as well as fluid inclusion analysis of secondary calcite crystals related to the cave forming phase.

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Section: Methodsmentioning

confidence: 99%

Combined use of conventional and clumped carbonate stable isotopes to identify hydrothermal isotopic alteration in cave walls

Temovski

Rinyu

Futó

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

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“…The longest and warmest of these are conventionally referred to as the Holstein and Eemian Interglacials, the former corresponding with MIS 11 or MIS 9 (see for example discussion in Nitychoruk et al, 2006), and the latter to MIS 5e, although regional differences in its onset have been observed (Sier et al, 2015b). On a global scale, these warmer and wetter periods are associated with hominin range expansions linked to the increase in suitable habitats triggered by intense climate amelioration (Asmerom et al, 2018;Hosfield and Cole, 2018;Scerri et al, 2018). A number of interglacial pollen records are known from swSS and are useful for evaluating the vegetation history of the region (Figure 2B).…”

Section: Climatic Constraints and Geo-environmental Boundariesmentioning

confidence: 99%