地球学报Issue(4)：507-512,6.DOI:10.3975/cagsb.2015.04.14
可可西里盆地东部五道梁群热水湖相成因新认识
Some New Opinions concerning the Genesis of the Lacustrine Hydrothermal Deposits in Wudaoliang Group, Eastern Hoh Xil Basin
摘要
Abstract
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 volcano-sedimentary boron deposits.关键词
五道梁群/叠层石/热水湖相沉积/铁白云石Key words
Wudaoliang Group/stromatolites/lacustrine hydrothermal sediments/ankerite分类
天文与地球科学引用本文复制引用
张雪飞,郑绵平,陈文西,叶传永,雒洋冰,孔维刚..可可西里盆地东部五道梁群热水湖相成因新认识[J].地球学报,2015,(4):507-512,6.基金项目
本文由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)和科技部公益性行业专项(编号:201011001)联合资助。 （编号：U1407207）
