《四川省威西鹽礦》是(shi)中國新(xin)星石油公司西南石油局第二地質大隊為主(zhu)(zhu)要(yao)研究單(dan)位(wei),王(wang)華榮、李蔭、許祖霖、林(lin)傳律、徐廷諒、胡建中、盧華勛、林(lin)躍庭、殷仲達(da)為主(zhu)(zhu)要(yao)完成人(ren)的(de)科研項目。
威(wei)西(xi)鹽(yan)(yan)(yan)礦(kuang)位于(yu)(yu)四(si)川盆地西(xi)南部的(de)榮縣、井研、樂山、犍為(wei)(wei)(wei)四(si)縣(市)境內,面積801平方(fang)公(gong)(gong)里(li)。區(qu)內地表出露(lu)地層(ceng)主(zhu)要(yao)(yao)為(wei)(wei)(wei)侏羅(luo)—白堊系(xi)(xi),三疊系(xi)(xi)上統為(wei)(wei)(wei)含煤(mei)碎屑巖(yan)(yan),中統雷口坡組和嘉(jia)陵(ling)江組由碳酸巖(yan)(yan)和膏(gao)鹽(yan)(yan)(yan)蒸發巖(yan)(yan)組成。雷口坡組第三段為(wei)(wei)(wei)主(zhu)要(yao)(yao)含鹽(yan)(yan)(yan)系(xi)(xi)。礦(kuang)床構造簡(jian)單(dan)(dan),總體為(wei)(wei)(wei)向北西(xi)傾斜的(de)單(dan)(dan)斜層(ceng),傾角(jiao)3—5°。含鹽(yan)(yan)(yan)系(xi)(xi)結構簡(jian)單(dan)(dan),層(ceng)序清晰,厚(hou)(hou)度為(wei)(wei)(wei)253.24—298.7米。根(gen)據含鹽(yan)(yan)(yan)層(ceng)結構特征,劃分為(wei)(wei)(wei)上、中、下三個鹽(yan)(yan)(yan)組,各鹽(yan)(yan)(yan)組由石(shi)灰巖(yan)(yan),各鹽(yan)(yan)(yan)組由石(shi)灰巖(yan)(yan)—石(shi)鹽(yan)(yan)(yan)巖(yan)(yan)或灰巖(yan)(yan)—硬石(shi)膏(gao)巖(yan)(yan)組成。威(wei)西(xi)巖(yan)(yan)鹽(yan)(yan)(yan)體南北長(chang)40公(gong)(gong)里(li),東西(xi)寬30公(gong)(gong)里(li),屬特大型的(de)層(ceng)狀礦(kuang)床。鹽(yan)(yan)(yan)層(ceng)厚(hou)(hou)度穩定,平均(jun)厚(hou)(hou)12.8米,厚(hou)(hou)度變(bian)(bian)化(hua)系(xi)(xi)數(shu)(shu)約為(wei)(wei)(wei)31%。礦(kuang)石(shi)礦(kuang)物組合及化(hua)學(xue)組份均(jun)較簡(jian)單(dan)(dan),礦(kuang)物以石(shi)鹽(yan)(yan)(yan)為(wei)(wei)(wei)主(zhu),次為(wei)(wei)(wei)硬石(shi)膏(gao),另有少量(liang)的(de)云石(shi)、云解(jie)石(shi)及菱鎂礦(kuang)等。礦(kuang)石(shi)主(zhu)要(yao)(yao)化(hua)學(xue)成分,為(wei)(wei)(wei)NaCl,其(qi)平均(jun)含量(liang)均(jun)大于(yu)(yu)93%,品位變(bian)(bian)化(hua)系(xi)(xi)數(shu)(shu)僅(jin)1.2%,CaSo4含量(liang)小于(yu)(yu)5%,其(qi)它(ta)有害雜質含量(liang)極微,均(jun)未超過食(shi)用鹽(yan)(yan)(yan)標(biao)準(zhun),不(bu)足(zu)的(de)是礦(kuang)石(shi)不(bu)含碘。礦(kuang)石(shi)工業(ye)品級全為(wei)(wei)(wei)I品級,加工技(ji)術性(xing)能簡(jian)單(dan)(dan),可溶性(xing)好,有利于(yu)(yu)水溶法開(kai)采。威(wei)西(xi)鹽(yan)(yan)(yan)礦(kuang)自開(kai)發以來(lai)已生(sheng)產(chan)鹵鹽(yan)(yan)(yan)2000多萬噸,創產(chan)值(zhi)40多億(yi)元(yuan),利稅近20億(yi)元(yuan),效益巨大。