本文選題：同位素組成 + 成礦物質(zhì)��； 參考：《地質(zhì)力學(xué)學(xué)報(bào)》2016年02期

【摘要】：在前人研究成果的基礎(chǔ)上,對(duì)江西新余良山鉬礦床的地質(zhì)特征進(jìn)行了詳細(xì)研究,系統(tǒng)測(cè)試了礦床中石英脈型鉬礦石樣品的氫、氧、硫和鉛同位素組成,進(jìn)而探討鉬礦床的成礦流體性質(zhì)以及成礦物質(zhì)來(lái)源。良山鉬礦床δD值變化范圍-61‰~-57.9‰,平均值-59.1‰;δ~(18)OV-SMOW值變化于7.1‰~10.5‰,平均值9.2‰,流體的δ18OH2O值變化于-3.32‰~-0.52‰,平均值-1.52‰,表明成礦流體具有巖漿水和大氣降水混合流體特征。硫化物的δ~(34)SV-CDT值為-1.8‰~2.6‰,極差4.4‰,平均值1.12‰,其中黃鐵礦δ3 4SV-CDT值為-1.8‰~2.6‰,輝鉬礦δ~(34)SV-CDT值為0.8‰~2.3‰,硫同位素表現(xiàn)為較小的正值特征,具有典型的巖漿硫組成特點(diǎn)。良山鉬礦石中的礦石鉛同位素~(206)Pb/~(204)Pb值為17.555~19.474,~(207)Pb/~(204)Pb值15.486~15.768,~(208)Pb/~(204)Pb值37.942~39.943,μ值9.35~9.7,ω值37.06~38.31,Th/U值3.8~3.96,礦石鉛為混合鉛,表明成礦物質(zhì)為混合來(lái)源。良山鉬礦床應(yīng)為巖漿熱液型-石英脈型鉬礦床,是中生代華南板塊板內(nèi)構(gòu)造演化區(qū)域金屬成礦作用大爆發(fā)的產(chǎn)物。
[Abstract]:Based on the previous research results, the geological characteristics of the Xinyu Liangshan molybdenum deposit in Jiangxi Province were studied in detail, and the isotopic compositions of hydrogen, oxygen, sulfur and lead in the quartz vein molybdenum ore samples were systematically tested. The ore-forming fluid properties of molybdenum deposits and the source of ore-forming materials are discussed. The 未 D value of Liangshan molybdenum deposit varies from -61 鈥，

本文編號(hào)：2093650