Arid
DOI10.1016/j.palaeo.2016.04.015
High-resolution trace element and stable/radiogenic isotope profiles, of late Pleistocene to Holocene speleothems from Dim Cave, SW Turkey
Unal-Imer, Ezgi1,2; Shulmeister, James1; Zhao, Jian-Xin3; Uysal, I. Tonguc2,4; Feng, Yue-Xing3
通讯作者Unal-Imer, Ezgi
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2016
卷号452页码:68-79
英文摘要

Multiple climate-sensitive trace element/Ca and stable isotope (O and C) profiles derived from Dim Cave speleothems (S-SW Turkey) provide evidence of climatic changes and define a series of palaeohydrological conditions for the period similar to 10-90 kyr. Dim Cave speleothem Mg/Ca, Sr/Ca, U/Ca, Ba/Ca, and Y/Ca ratios demonstrate similar patterns over glacial-interglacial scales, in agreement with delta O-18 and delta C-13 records. Three episodes of more positive moisture balance (71-63 kyr, 51-40 kyr, and 18-10 kyr) were observed based on Y/Ca (and to a lesser extent Zr/Ca), Sr-87/Sr-86 ratios, calcite micromorphology, and growth rates. Increasing concentrations of Y, Zr (and U) and elevated Sr-87/Sr-86 ratios are attributed to enhanced levels of terrestrial input during these periods. Correlations between delta C-13, delta O-18 and Mg/Ca during 40-18 kyr (corresponding with the lowest growth rate of similar to 0.8 mm/kyr), 63-51, and 80-71 kyr (relatively low growth rates), as well as co-varying and enhanced Mg/Ca, Sr/Ca, and to a lesser extent Ba/Ca, ratios point to the prior calcite precipitation, wall rock interaction, and preferential dolomite dissolution over calcite in the host dolomitic limestone during these periods. This relationship suggests that water-rock interactions are maximised during episodes of slower drip rates of water through the karst under drier conditions. Chondrite-normalised rare earth element and yttrium (REY) patterns of the stalagmites reveal seawater signatures closely linked to the dolomitic limestone. Excluding the aragonite formation during similar to 80-75 kyr, which is an autogenic effect, trace element/Ca ratios appear to respond to millennial scale global cooling periods such as Heinrich events. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Speleothem geochemistry Stable isotope ratio Sr-isotope ratio Dim Cave SW Turkey Eastern Mediterranean
类型Article
语种英语
国家Australia ; Turkey
收录类别SCI-E
WOS记录号WOS:000375815300006
WOS关键词EASTERN MEDITERRANEAN REGION ; LAST GLACIAL MAXIMUM ; SOREQ CAVE ; PARTITION-COEFFICIENTS ; STRONTIUM ISOTOPES ; ARABIAN DESERT ; NEGEV DESERT ; CLIMATE ; PALEOCLIMATE ; RECONSTRUCTION
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向Physical Geography ; Geology ; Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/195340
作者单位1.Univ Queensland, Sch Geog Planning & Environm Management, Climate Res Grp, Brisbane, Qld 4072, Australia;
2.Univ Queensland, Queensland Geothermal Energy Ctr Excellence, Brisbane, Qld 4072, Australia;
3.Univ Queensland, Sch Earth Sci, Brisbane, Qld 4072, Australia;
4.Hacettepe Univ, Dept Geol Engn, TR-06800 Ankara, Turkey
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Unal-Imer, Ezgi,Shulmeister, James,Zhao, Jian-Xin,et al. High-resolution trace element and stable/radiogenic isotope profiles, of late Pleistocene to Holocene speleothems from Dim Cave, SW Turkey[J],2016,452:68-79.
APA Unal-Imer, Ezgi,Shulmeister, James,Zhao, Jian-Xin,Uysal, I. Tonguc,&Feng, Yue-Xing.(2016).High-resolution trace element and stable/radiogenic isotope profiles, of late Pleistocene to Holocene speleothems from Dim Cave, SW Turkey.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,452,68-79.
MLA Unal-Imer, Ezgi,et al."High-resolution trace element and stable/radiogenic isotope profiles, of late Pleistocene to Holocene speleothems from Dim Cave, SW Turkey".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 452(2016):68-79.
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