上扬子区寒武系蒸发岩沉积相及成钾潜力分析

寒武纪是世界上重要的成钾时代之一。早寒武世成钾的西伯利亚涅帕钾盐矿床是世界上特大型钾盐矿床之一；印度一巴基斯坦在“始寒武世”地层成钾；伊朗在寒武纪地层也有钾盐发现。与其它大陆成盐强度相比，寒武系成盐成钾成为“亚洲现象”。中国地处东亚，已发现越来越多寒武系成盐盆地。本文着重介绍上扬子区寒武系蒸发岩发育特点，指出在上扬子陆块之上，发育面积达20万km2的蒸发岩盆地，并首次圈定两个膏盐岩聚集区（次盐盆地）：泸州一江津区与巫溪一建南区，该区具备有利成盐找钾条件，值得今后进一步研究探索。

Sedimentary Facies of the Cambrian Evaporites in the Upper Yangtze Region and Their Potash-Forming Potential

The Cambrian period is one of the most important potash-forming eras on the Earth. The Siberian Niepa potash deposit that formed in the late Cambrian is one of the largest potash deposits in the world. India and Pakistan also found potash deposits forming in Late Sinian. In Iran are discovered potash deposits in the Cambrian System. Contrast to the potash-forming intensity of other continents, the Cambrian period has become a special potash-forming age in Asia. Recently, more and more Cambrian evaporite basins have been found in China. This study focuses on presentation of the characteristics of the upper Yangtze evaporites, and states that there is more than 200,000 km2 evaporite basins in the upper Yangtze area, and delineates two most favorable areas for potash (sub-basin of gypsum-halite ): i.e. the Jiangjin-Luzhou and Jiannan -Pengshui areas. These two areas are good geologic settings for further investigation.