本文選題：成因 + 穩(wěn)定同位素��； 參考：《礦物學(xué)報》2017年05期

【摘要】：新疆薩熱克大型銅礦床含礦地層為上侏羅統(tǒng)庫孜貢蘇組砂礫巖,與下伏下-中侏羅統(tǒng)煤礦形成"同盆共存"現(xiàn)象。薩熱克銅礦石中碎裂巖化發(fā)育,并伴有瀝青化,金屬硫化物以輝銅礦為主,含少量的斑銅礦和黃銅礦等,多與次生石英-方解石等沿礫石裂隙分布。礦石中輝銅礦δ34S=-19.1‰~-13.2‰,輝銅礦206Pb/204Pb比值范圍為16.699~18.417,207Pb/204Pb為15.294~15.684,208Pb/204Pb為36.909~38.996。次生石英流體包裹體的δ18OH2O值變化范圍為17.9‰~20.6‰,δDV-SMOW變化范圍為-82.6‰~-52.4‰。礦石中瀝青δ13C變化范圍為-20.79‰~-20.35‰,康蘇組煤巖δ13CV-PDB值變化范圍為-24.7‰~-24.3‰,兩者較為接近。上述結(jié)果表明薩熱克銅礦床中的硫源自地層中大量硫酸鹽的還原作用,鉛同位素指示成礦金屬元素具有多元性,次生石英中成礦流體以變質(zhì)流體為主,礦石中的瀝青等有機(jī)質(zhì)與下伏中-下侏羅統(tǒng)煤層等烴源巖有關(guān)。上述同位素資料結(jié)合礦床的地質(zhì)特征顯示薩熱克銅礦床具有多期多階段的成礦特征。
[Abstract]:The ore-bearing strata of the large copper deposit in Sajek, Xinjiang, are the sandstones of the Kuzigongsu formation of the Upper Jurassic, and "coexisted in the same basin" with the lower and middle Jurassic coal mines. In Sajek copper ore, the cataclastic lithology is developed and accompanied by bitumen. The metal sulphide is mainly chalcopyrite, containing a small amount of porphyrite and chalcopyrite, and most of them are distributed along the gravel fissure with secondary quartz calcite and so on. The 未 34S=-19.1 鈥，

本文編號：1928639