现代地质Issue(6)：1332-1339,8.
西藏改则热那错地区上三叠统日干配错组碳酸盐岩C、O 同位素特征及其地质意义
Characteristics of Carbon and Oxygen Isotopes of Carbonate Rocks in Riganpeicuo Formation of Upper Triassic in Renacuo Area of Gaize, Tibet and Its Geological Significance
摘要
Abstract
The Renacuo area of Gaize,Tibet,in the southern Qiangtang Basin,shows a series of strikingly thick carbonate layers.Research on C and O isotopes in the area plays an important role in the reconstruction of the paleoenvironment and the identification of the sedimentary characteristics.Based on the geological map of the lithostratigraphy (1∶2,000),the numerous samples collected in the field and analysis of the C and O isotopes, the Z values of salinity from 126.32 to 135.37,which indicates that the paleoseawater in the Renacuo area of Gaize ranges from normal marine to hypersaline.In addition,the average temperature of the paleoseawater is 22.4 ℃,firm evidence of a warm climate.Both the rates of δ18 O and δ13 C vary with respect to the sea level:the deeper the seawater,the higher the δ18 O.The paleotemperature and paleosalinity from the determination of C and O isotopes closely reflect the related sedimentary facies.关键词
C,O 同位素/古环境/上三叠统日干配错组/西藏改则热那错Key words
carbon and oxygen isotope/paleoenvironment/Riganpeicuo Formation of Upper Triassic/Rena-cuo area of Gaize,Tibet分类
天文与地球科学引用本文复制引用
侯恩刚,高金汉,王训练,王根厚,胡歆睿,马占川..西藏改则热那错地区上三叠统日干配错组碳酸盐岩C、O 同位素特征及其地质意义[J].现代地质,2013,(6):1332-1339,8.基金项目
中国地质调查局项目（2-5-2011-67）；中央高校基本科研业务费项目（2011YYL118）。 （）
