- 责任者：Hou Engang (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Gao Jinhan
- 刊名：Geoscience
- 出版年：2013
- 卷期：27(6)
- 关键词：碳酸盐岩 ; carbonate rocks ; 古环境 ; paleoenvironment ; 西藏 ; Tibet
- 页码：p.1332-1339
- 图表：5 illus., 2 tables, 50 refs.
- 分类号：0803
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
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.