| 柴西南英西地区下干柴沟组上段蒸发岩沉积旋回特征 |
| |
| 引用本文： | 徐彬,李建明,张永庶,崔俊,余笑航.柴西南英西地区下干柴沟组上段蒸发岩沉积旋回特征[J].高校地质学报,2019,25(1):99. |
| |
| 作者姓名： | 徐彬 李建明 张永庶 崔俊 余笑航 |
| |
| 作者单位： | 长江大学地球科学学院,武汉,430100;长江大学地球科学学院,武汉430100;非常规油气湖北省协同创新中心,武汉430100;中国石油青海油田分公司勘探开发研究院,敦煌,736202;中国地质大学(武汉) 海洋学院,武汉,430074 |
| |
| 摘 要： | 柴西南英西地区下干柴沟组上段为一套湖盆含蒸发岩系。文章综合运用薄片、岩心、钻井、测井、化验分析等资
料，对研究区下干柴沟组上段蒸发岩系沉积旋回特征进行了研究。研究表明，平面上由盆地中心向边缘呈现蒸发岩-混积
型碳酸盐岩-碎屑岩的环带状分布，纵向上发育2 个三级旋回及6 个四级旋回期次。各级蒸发岩沉积旋回具有不对称的特
征，即快速湖侵、缓慢湖退。总结出研究区的五种蒸发岩岩相组合类型。研究区蒸发岩为气候干旱、盆地基底快速沉降背
景下，湖退时残留盐湖中以蒸发结晶为主具有一定水深的成因，并建立了沉积旋回发育模式。
|
| 关 键 词： | 柴西南 英西地区 下干柴沟组上段 蒸发岩 盐湖 沉积旋回 |
Sedimentary Cycles of Evaporitive Sequences in the Upper Member of the Lower Ganchaigou Formation in the Yingxi Area,Southwestern Qaidam Basin |
| |
| XU Bin,LI Jianming,ZHANG Yongshu,CUI Jun,YU Xiaohang.Sedimentary Cycles of Evaporitive Sequences in the Upper Member of the Lower Ganchaigou Formation in the Yingxi Area,Southwestern Qaidam Basin[J].Geological Journal of China Universities,2019,25(1):99. |
| |
| Authors: | XU Bin LI Jianming ZHANG Yongshu CUI Jun YU Xiaohang |
| |
| Abstract: | The upper member of the Lower Ganchaigou Formation in the Yingxi area, southwestern Qaidam Basin, is a set of evaporitebearing
lacustrine series. Pate of thin section, cores, drillings logging as well as geochemistry were systematically used to study the
characteristics of sedimentary cycles of the series in this paper. Results show a zonal distribution of evaporites to mixed carbonate rocks
and to clastic rocks from the center to the margin of the basin laterally. Vertically, two third-order sedimentary cycles and six
fourth-order sedimentary cycles were developed. Sedimentary cycles of all the levels are asymmetry with rapid transgression and slow
regression. Five types of lithofacies combination of evaporites were identified. Evaporites were formed by evaporitive crystallization
under a certain depth of lake water during regression, when there was an arid paleo-climate and rapid subsidence of the basin basement.
The development model of sedimentary cycles in the study area is established accordingly. |
| |
| Keywords: | southwestern Qaidam Basin Yingxi area the upper member of Lower Ganchaigou Formation evaporites salt lake sedimentary cycles |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《高校地质学报》浏览原始摘要信息 |
|
点击此处可从《高校地质学报》下载全文 |
|
