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《四(si)川省(sheng)威(wei)西鹽礦》是中國新星石(shi)油公(gong)司西南石(shi)油局第二地質大隊為(wei)主要(yao)研(yan)究(jiu)單位，王華榮(rong)、李蔭、許祖霖(lin)、林(lin)傳(chuan)律、徐廷諒、胡建(jian)中、盧華勛(xun)、林(lin)躍庭、殷仲達為(wei)主要(yao)完成人的科研(yan)項目(mu)。

項目摘要

威西(xi)鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)礦(kuang)(kuang)位(wei)于(yu)四川(chuan)盆地(di)(di)(di)西(xi)南(nan)部的(de)榮縣、井研(yan)、樂山、犍為(wei)(wei)(wei)(wei)四縣（市）境(jing)內，面積(ji)801平(ping)方公(gong)里(li)。區內地(di)(di)(di)表出露(lu)地(di)(di)(di)層(ceng)(ceng)(ceng)主(zhu)(zhu)要為(wei)(wei)(wei)(wei)侏羅—白堊系，三疊系上(shang)統為(wei)(wei)(wei)(wei)含煤碎屑巖(yan)，中統雷(lei)口(kou)坡組(zu)和(he)嘉陵江組(zu)由(you)碳(tan)酸巖(yan)和(he)膏(gao)(gao)鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)蒸發巖(yan)組(zu)成。雷(lei)口(kou)坡組(zu)第三段為(wei)(wei)(wei)(wei)主(zhu)(zhu)要含鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)系。礦(kuang)(kuang)床構(gou)造(zao)簡單(dan)(dan)，總(zong)體(ti)為(wei)(wei)(wei)(wei)向北西(xi)傾斜(xie)的(de)單(dan)(dan)斜(xie)層(ceng)(ceng)(ceng)，傾角3—5°。含鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)系結構(gou)簡單(dan)(dan)，層(ceng)(ceng)(ceng)序清晰(xi)，厚(hou)度為(wei)(wei)(wei)(wei)253.24—298.7米(mi)。根據含鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)層(ceng)(ceng)(ceng)結構(gou)特征，劃(hua)分(fen)為(wei)(wei)(wei)(wei)上(shang)、中、下三個鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)組(zu)，各(ge)鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)組(zu)由(you)石(shi)(shi)(shi)灰(hui)巖(yan)，各(ge)鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)組(zu)由(you)石(shi)(shi)(shi)灰(hui)巖(yan)—石(shi)(shi)(shi)鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)巖(yan)或灰(hui)巖(yan)—硬石(shi)(shi)(shi)膏(gao)(gao)巖(yan)組(zu)成。威西(xi)巖(yan)鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)體(ti)南(nan)北長40公(gong)里(li)，東西(xi)寬30公(gong)里(li)，屬(shu)特大(da)型的(de)層(ceng)(ceng)(ceng)狀礦(kuang)(kuang)床。鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)層(ceng)(ceng)(ceng)厚(hou)度穩(wen)定，平(ping)均(jun)(jun)(jun)厚(hou)12.8米(mi)，厚(hou)度變化(hua)(hua)系數約為(wei)(wei)(wei)(wei)31%。礦(kuang)(kuang)石(shi)(shi)(shi)礦(kuang)(kuang)物組(zu)合及化(hua)(hua)學組(zu)份均(jun)(jun)(jun)較簡單(dan)(dan)，礦(kuang)(kuang)物以(yi)石(shi)(shi)(shi)鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)為(wei)(wei)(wei)(wei)主(zhu)(zhu)，次(ci)為(wei)(wei)(wei)(wei)硬石(shi)(shi)(shi)膏(gao)(gao)，另有少量的(de)云石(shi)(shi)(shi)、云解石(shi)(shi)(shi)及菱鎂(mei)礦(kuang)(kuang)等。礦(kuang)(kuang)石(shi)(shi)(shi)主(zhu)(zhu)要化(hua)(hua)學成分(fen)，為(wei)(wei)(wei)(wei)NaCl，其(qi)平(ping)均(jun)(jun)(jun)含量均(jun)(jun)(jun)大(da)于(yu)93%，品位(wei)變化(hua)(hua)系數僅1.2%，CaSo4含量小于(yu)5%，其(qi)它有害(hai)雜質含量極微，均(jun)(jun)(jun)未超過食用鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)標(biao)準，不足的(de)是礦(kuang)(kuang)石(shi)(shi)(shi)不含碘。礦(kuang)(kuang)石(shi)(shi)(shi)工業品級全為(wei)(wei)(wei)(wei)I品級，加工技(ji)術性能簡單(dan)(dan)，可溶性好(hao)，有利于(yu)水溶法開采。威西(xi)鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)礦(kuang)(kuang)自開發以(yi)來已生產(chan)鹵鹽(yan)(yan)(yan)(yan)(yan)(yan)(yan)2000多(duo)萬噸，創產(chan)值40多(duo)億元，利稅近20億元，效益(yi)巨大(da)。