古地理学报Issue(3)：371-380,10.DOI:10.7605/gdlxb.2015.03.031
柴达木盆地新生界湖盆咸化特征及沉积响应
Palaeosalinity characteristics and its sedimentary response to the Cenozoic salt-water lacustrine deposition in Qaidam Basin
摘要
Abstract
The salt-water lacustrine deposition was developed during the Cenozoic in Qaidam Basin, but its salinity and sedimentary response have not been known.Based on boron and clay mineral data, palaeosalinities of the Cenozoic in Qaidam Basin were reconstructed by Couch formula, which testified that:(1 )The Cenozoic sediments belonged to the salt-water lacustrine deposition with the maximum salin-ity over 20‰.(2)The zones with different palaeosalinities had different sedimentary responses,that is, the palaeosalinity values of terrigenous clastics supplying areas were commonly less than 1 2‰,while those of shore-shallow lake ranged from 1 0‰ to 1 8‰,and those of semi-deep lake exceeded 1 8‰.Under the control of salt-water with middle to high salinity,the salt water lacustrine deposition in Qaidam Basin has the following characteristics:single layer is thin usually with 1 -3 m thickness,sand layer and mud layer are frequently interbedded,delta sedimentary facies belt is relatively narrow,fine grained sediments are distributed in a wide range,and typical lacustrine carbonate rocks,gypsum and terrestrial fine detritus are mixed.关键词
新生界/古盐度/咸化湖盆/沉积响应/柴达木盆地Key words
Cenozoic/palaeosalinity/salt-water lacustrine basin/sedimentary response/Qaidam Basin分类
天文与地球科学引用本文复制引用
陈能贵,王艳清,徐峰,杨体源,夏志远..柴达木盆地新生界湖盆咸化特征及沉积响应[J].古地理学报,2015,(3):371-380,10.基金项目
中国石油天然气股份有限公司重大科技专项“柴达木盆地建设千万吨油气田综合配套技术研究”（编号2011 E－03）资助 （）
