《Table 4 PAAS-normalized REE values of Wudaoliang stromatolites and their reference samples》
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《"Palaeoenvironmental setting of lacustrine stromatolites in the Miocene Wudaoliang Group, northern Tibetan Plateau"》
Furthermore,we compared the oxygen isotope of Wudaoliang stromatolites with the Holocene travertines in the Qiangtang Basin(Niu et al.2013).The source water of the hot spring travertines is of meteoric origin(Tian et al.2001;Zhang et al.2002).A significantly elevatedδ13C(up to 11.7‰)is found in these travertines,possibly related to a deep source of CO2(Tian et al.2001;Zhang et al.2002).Similarδ18O values of stromatolites to those of the Holocene travertines thus may also indicate a mixed origin of hydrothermal fluids with the Miocene period local rainfall,presuming the monsoon precipitation was similar to present conditions.However,uncertainty remains with this hypothesis,since the monsoon precipitation on northern Tibetan Plateau could have had different isotopic composition during the Miocene(see Polissar et al.2009).Further studies are required to address this problem.
图表编号 | XD0061547400 严禁用于非法目的 |
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绘制时间 | 2019.07.01 |
作者 | Ling-Qi Zeng、Hai-Sheng Yi、Guo-Qing Xia、Klaus Simon、Christine Heim、Gernot Arp |
绘制单位 | Institute of Sedimentary Geology, Chengdu University of Technology、Institute of Sedimentary Geology, Chengdu University of Technology、State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation、Institute of Sedimentary Geology, Chengdu Universi |
更多格式 | 高清、无水印(增值服务) |
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