《四川省威西鹽礦》是中國(guo)新星石油公司西南石油局(ju)第二地(di)質大隊為主(zhu)要研(yan)(yan)究單位,王華(hua)榮、李蔭(yin)、許祖(zu)霖、林傳律、徐廷諒、胡建中、盧華(hua)勛、林躍庭、殷仲(zhong)達為主(zhu)要完成人(ren)的科研(yan)(yan)項目。
威(wei)西(xi)鹽(yan)(yan)(yan)(yan)(yan)礦(kuang)(kuang)位于四川盆地(di)西(xi)南(nan)部的(de)(de)榮縣、井(jing)研(yan)、樂山(shan)、犍為(wei)(wei)(wei)四縣(市)境內(nei),面積801平(ping)方(fang)公里(li)。區內(nei)地(di)表(biao)出露地(di)層(ceng)(ceng)主(zhu)要為(wei)(wei)(wei)侏(zhu)羅—白(bai)堊系(xi),三疊(die)系(xi)上(shang)統為(wei)(wei)(wei)含(han)(han)煤(mei)碎屑(xie)巖(yan)(yan),中統雷(lei)(lei)口(kou)坡(po)組和嘉陵江組由碳酸巖(yan)(yan)和膏(gao)鹽(yan)(yan)(yan)(yan)(yan)蒸(zheng)發(fa)巖(yan)(yan)組成。雷(lei)(lei)口(kou)坡(po)組第三段為(wei)(wei)(wei)主(zhu)要含(han)(han)鹽(yan)(yan)(yan)(yan)(yan)系(xi)。礦(kuang)(kuang)床構造簡(jian)單,總體為(wei)(wei)(wei)向北西(xi)傾(qing)斜的(de)(de)單斜層(ceng)(ceng),傾(qing)角3—5°。含(han)(han)鹽(yan)(yan)(yan)(yan)(yan)系(xi)結(jie)構簡(jian)單,層(ceng)(ceng)序清(qing)晰,厚(hou)(hou)度為(wei)(wei)(wei)253.24—298.7米(mi)。根據(ju)含(han)(han)鹽(yan)(yan)(yan)(yan)(yan)層(ceng)(ceng)結(jie)構特(te)(te)征(zheng),劃分(fen)為(wei)(wei)(wei)上(shang)、中、下三個鹽(yan)(yan)(yan)(yan)(yan)組,各(ge)鹽(yan)(yan)(yan)(yan)(yan)組由石(shi)(shi)灰巖(yan)(yan),各(ge)鹽(yan)(yan)(yan)(yan)(yan)組由石(shi)(shi)灰巖(yan)(yan)—石(shi)(shi)鹽(yan)(yan)(yan)(yan)(yan)巖(yan)(yan)或灰巖(yan)(yan)—硬石(shi)(shi)膏(gao)巖(yan)(yan)組成。威(wei)西(xi)巖(yan)(yan)鹽(yan)(yan)(yan)(yan)(yan)體南(nan)北長40公里(li),東西(xi)寬(kuan)30公里(li),屬(shu)特(te)(te)大(da)(da)型(xing)的(de)(de)層(ceng)(ceng)狀礦(kuang)(kuang)床。鹽(yan)(yan)(yan)(yan)(yan)層(ceng)(ceng)厚(hou)(hou)度穩(wen)定,平(ping)均(jun)厚(hou)(hou)12.8米(mi),厚(hou)(hou)度變化(hua)(hua)系(xi)數(shu)約為(wei)(wei)(wei)31%。礦(kuang)(kuang)石(shi)(shi)礦(kuang)(kuang)物組合及化(hua)(hua)學組份(fen)均(jun)較簡(jian)單,礦(kuang)(kuang)物以(yi)(yi)石(shi)(shi)鹽(yan)(yan)(yan)(yan)(yan)為(wei)(wei)(wei)主(zhu),次為(wei)(wei)(wei)硬石(shi)(shi)膏(gao),另有(you)少量的(de)(de)云石(shi)(shi)、云解石(shi)(shi)及菱鎂礦(kuang)(kuang)等。礦(kuang)(kuang)石(shi)(shi)主(zhu)要化(hua)(hua)學成分(fen),為(wei)(wei)(wei)NaCl,其(qi)平(ping)均(jun)含(han)(han)量均(jun)大(da)(da)于93%,品(pin)(pin)位變化(hua)(hua)系(xi)數(shu)僅1.2%,CaSo4含(han)(han)量小于5%,其(qi)它(ta)有(you)害雜質含(han)(han)量極微(wei),均(jun)未超過食(shi)用鹽(yan)(yan)(yan)(yan)(yan)標準,不足的(de)(de)是(shi)礦(kuang)(kuang)石(shi)(shi)不含(han)(han)碘(dian)。礦(kuang)(kuang)石(shi)(shi)工業(ye)品(pin)(pin)級全(quan)為(wei)(wei)(wei)I品(pin)(pin)級,加工技術性(xing)(xing)能簡(jian)單,可溶性(xing)(xing)好,有(you)利于水溶法開采。威(wei)西(xi)鹽(yan)(yan)(yan)(yan)(yan)礦(kuang)(kuang)自開發(fa)以(yi)(yi)來已生(sheng)產(chan)鹵鹽(yan)(yan)(yan)(yan)(yan)2000多萬噸,創產(chan)值40多億元,利稅(shui)近20億元,效益巨大(da)(da)。