气候变化领域集成服务门户(CCPortal): Sensitivity of lacustrine stromatolites to Cenozoic tectonic and climatic forcing in the southern Junggar Basin; NW China: New insights from mineralogical; stable and clumped isotope compositions

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DOI	10.1016/j.palaeo.2018.10.011
	Sensitivity of lacustrine stromatolites to Cenozoic tectonic and climatic forcing in the southern Junggar Basin; NW China: New insights from mineralogical; stable and clumped isotope compositions
	Yang W.; Zuo R.; Wang X.; Song Y.; Jiang Z.; Luo Q.; Zhai J.; Wang Q.; Zhang C.; Zhang Z.
发表日期	2019
ISSN	0031-0182
起始页码	109
结束页码	123
卷号	514
英文摘要	Lacustrine stromatolites serve as high-resolution and sensitive archives of palaeoenvironmental settings and palaeoclimatic conditions. An exceptionally well-developed stromatolite bed was discovered within nearshore shallow lacustrine sediments of the Lower Miocene Taxihe Formation on the southern margin of the Junggar Basin, north of the Tian Shan Range. We investigated the morphology, mineralogy, clumped and traditional stable isotope geochemistry of the stromatolites by using a multi-method approach with the application of X-ray diffraction analysis, advanced mineral identification and characterization (AMICSCAN), a clumped isotope palaeothermometer and modelling. The overall positive excursions and covariance of δ18O (varying from +10.61‰ to −5.82‰ V-PDB) and δ13C (ranging between −1.27‰ and +2.08‰ V-PDB) values are interpreted as the result of deposition in a closed-basin system under local progressive evaporation conditions during an episode of aridification. Clumped isotope proxy records display a significant decrease in water δ18O values and a decline of lake water temperature from ~38 to ~32 °C, suggesting a shift towards more arid and relatively cooler conditions during the course of stromatolite accretion. This interpretation agrees with lake volume and water level decreases inferred from isotope modelling results. The Late Cenozoic aridification of the southern margin of the Junggar Basin is thus interpreted from a new and unique perspective to have prevailed since the Early Miocene, driven by renewed uplift of the northern Tian Shan Range. The investigated stromatolite records reflect a snapshot of the local palaeoclimatic and palaeoenvironmental evolution, and our work provides references for potential studies of future discoveries of lacustrine microbialites in northwestern China. © 2018 Elsevier B.V.
英文关键词	Aridification; Lake level; Mineralogical; Northern Tian Shan; Palaeoenvironment; Palaeothermometer
语种	英语
scopus关键词	aridification; aridity; Cenozoic; climate forcing; experimental mineralogy; lacustrine deposit; lake level; microbialite; mineralogy; paleoclimate; paleoenvironment; proxy climate record; sensitivity analysis; stromatolite; thermomechanics; thermometry; China; Junggar Basin; Tien Shan; Xinjiang Uygur
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151169
作者单位	State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, 102249, China; Unconventional Natural Gas Institute, China University of Petroleum, Beijing, 102249, China; Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Oil & Gas Survey, China Geological Survey, Beijing, 100029, China; The Key Laboratory of Unconventional Petroleum Geology, CGS, Beijing, 100029, China
推荐引用方式 GB/T 7714	Yang W.,Zuo R.,Wang X.,et al. Sensitivity of lacustrine stromatolites to Cenozoic tectonic and climatic forcing in the southern Junggar Basin; NW China: New insights from mineralogical; stable and clumped isotope compositions[J],2019,514.
APA	Yang W..,Zuo R..,Wang X..,Song Y..,Jiang Z..,...&Zhang Z..(2019).Sensitivity of lacustrine stromatolites to Cenozoic tectonic and climatic forcing in the southern Junggar Basin; NW China: New insights from mineralogical; stable and clumped isotope compositions.Palaeogeography, Palaeoclimatology, Palaeoecology,514.
MLA	Yang W.,et al."Sensitivity of lacustrine stromatolites to Cenozoic tectonic and climatic forcing in the southern Junggar Basin; NW China: New insights from mineralogical; stable and clumped isotope compositions".Palaeogeography, Palaeoclimatology, Palaeoecology 514(2019).