渭河盆地渭南段古三门湖的盐度估算  

Calculation on the paleosalinity of the ancient Sanmen Lake in the Weinan Area of Weihe River Basin

作　　者：刘护军[1] 薛祥煦[1] 李永项[1] 

机构地区：[1]西北大学地质学系,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2006年第1期112-114,共3页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(40071006)

摘　　要：目的研究古三门湖的盐度数值。方法在渭河盆地渭南部分地区的古三门湖沉积地层中采集泥岩样品，分析了样品中的B元素，然后利用有关公式求得古三门湖的盐度。结果渭河盆地渭南段三门组盐度变化范围大致为1．66％～1．88％，游河组盐度变化范围大致为1．38％～2.06％。结论渭南段三门组为低盐度沉积，游河组为低盐度一半咸水沉积。Aim To obtain the paleosalinity of the ancient Sanmen Lake. Methods Several samples of mudstone were collected in the Weinan Area of Weihe River Basin, Shaanxi Province, China ; the element values of boron from the samples were analysed and the paleosalinity of the ancient Sanmen lake was calculated using the formula concerned. Results In the Weinan Area, the Sanmen Formation＇s salinity varies roughly froml. 66% to 1.88% ,and the Youhe Formation＇s salinity varies approximately from 1.38% to 2.06%. Conclusion In studied area, the Sanmen Formation belongs to a low salinity deposit, the Youhe Formation belongs to low salinity to brackish water deposit.

关 键 词：盐度 古三门湖 渭南地区 渭河盆地 

分 类 号：X142[环境科学与工程—环境科学]