| 可可西里盆地东部五道梁群热水湖相成因新认识 |
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| 关键词:Wudaoliang Group stromatolites lacustrine hydrothermal sediments ankerite |
| 基金项目:国家自然科学基金柴达木盐湖化工联合基金重点项目(编号: U1407207); 中国地质调查局地质大调查项目(编号: 1212011085524); 科技部公益性行业专项(编号: 201011001) |
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| Some New Opinions concerning the Genesis of the Lacustrine Hydrothermal Deposits in Wudaoliang Group, Eastern Hoh Xil Basin |
| Located in Hoh Xil basin in the north of the Tibetan Plateau, Wudaoliang area possesses a lot of carbonate deposits. The authors studied the mineralogy and element geochemistry of the sediments from the south and north sections of Wudaoliang. The main mineral is calcite with a small amount of quartz in the north sections, while there are ankerite, calcite, quartz and albite in south section. According to the discovery of ankerite and secondary enlarged pore-fringes in albite, the authors hold that Wudaoliang area was affected by hydrothermal activity. The characteristic elements such as As, Sb, Ba, Fe, and the ratios like Ni/Co, Mn, Sr/Cr, V, V/Sc are relatively high. The REE patterns and the carbon and oxygen isotope characteristics also indicate the hydrothermal activities. The emergence of the laminated algae also reflects the water temperature of at least 20 to 30℃. The results obtained by the authors suggest that the Wudaoliang Group is lacustrine hydrothermal sediments. In addition, a large number of volcanic rocks were developed in Miocene, which can be used as the important clues to finding the vol-cano-sedimentary boron deposits. |
| ZHANG Xue-fei,ZHENG Mian-ping,CHEN Wen-xi,YE Chuan-yong,LUO Yang-bing,KONG Wei-gang.2015.Some New Opinions concerning the Genesis of the Lacustrine Hydrothermal Deposits in Wudaoliang Group, Eastern Hoh Xil Basin[J].Acta Geoscientica Sinica,36(4):507-512. |
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