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四川石膏从古生代至中生代均有产出,并分布广泛,规模较大,具工业价值的矿床以三迭系为主。随着工业的发展,石膏需要量日益扩大,特别是建材工业用于轻质墙体材料,石膏更是不可缺少的重要原料。三迭系石膏出露地表的矿点约50余处,而深部钻井发现之矿点几乎遍布四川盆地,矿层一般厚度较大,矿石质佳,含矿层位多等特点。仅据现有资料分析研究,提出一些初步认识。一、矿点所处大地构造位置基本特点四川三迭系石膏矿点分布与所处大地构造位置关系密切,其大地构造单元属扬子准地台的西北及中部地区。地台基底,在四川为一套古老的前震旦系变质岩系与沉积盖层呈角度不整合接触。基底之上沉积物厚5000～10000米,从震旦系至三迭系中期为海相沉积,三迭系晚期以来受燕山
Sichuan gypsum from the Paleozoic to the Mesozoic have output, and widely distributed, large-scale, with the industrial value of the three Diego-based deposits. With the development of industry, the demand of gypsum is expanding day by day. Especially the building materials industry is used for light wall materials. Gypsum is an indispensable important raw material. Triassic gypsum exposed the surface of the ore point about 50, while the deep drilling found almost all over the Sichuan Basin, the ore thickness is generally larger, better quality ore, ore-bearing layers and so on. According to the existing data analysis and research, put forward some preliminary understanding. First, the basic features of the tectonic location where the mine is located The triassic gypsum mine distribution in Sichuan is closely related to the tectonic location of the area where the tectonic unit belongs to the northwestern and central parts of the Yangtze Platform. Platform basement, in Sichuan for an ancient set of pre-Sinian metamorphic rocks and sedimentary cover angular contact unconformity. Sediments above the basement are 5,000 to 10,000 meters thick and are of marine sediments from the mid-Sinian to Middle Triassic. Since the late Triassic, Yanshan