摘要
一系列的黑色岩系多金属矿床广泛分布于中国南方地区寒武系底部,前人对多金属矿特征、成因等方面进行许多研究,但对Mo-Ni、V、P和Ba矿的成矿顺序研究较少。本文对云南德泽、贵州纳雍-坝黄-天柱及湘西柑子坪等地区的寒武系底部黑色岩系多金属矿的成岩成矿环境、矿石矿物微观特征、成矿地球化学等方面研究,结合元素富集层出现先后可将寒武系底部成矿作用自下而上分为四个成矿序列:即磷矿成矿序列、重晶石矿成矿序列、钒矿成矿序列、镍钼矿序列。同时,根据岩石组合、矿物组合、含矿性等特征,将贵州境内Mo-Ni、V、P和Ba矿床划分为三个成矿区,即纳雍-遵义-福泉黔中镍钼成矿区、铜仁-镇远-岑巩黔东南钒(镍钼)成矿区、天柱-新晃重晶石成矿区。
A series of black-shale-series polymetallic deposits are widely distributed in the base of Cambrian System of southwestern China.Although there have been a lot of studies on characteristics and genesis of these deposits,their metallogenic sequence of Mo-Ni-V-P-Ba has received little attention. This paper presents a study on the metallogenic and diagenetic environment,microscopic features,metallogenic geochemistry characteristics and the sequence of the element enrichment layers at the base of Cambrian in Deze of Yunnan,Nayong-Bahuang-Tianzhu of Guizhou,and Ganziping of western Hunan. From lower to upper,the metallogenic process was divided into four sequences: phosphorite,barite,vanadium and nickel-molybdenum mineralization sequences. Meanwhile,according to mineral and rock combinations and ore-bearing characteristics,the Mo-Ni,V( Ni-Mo) and Ba deposits in Guizhou were divided into three metallogentic areas: Nayong-Zunyi-Fuquan,Tongren-Zhenyuan-Cengong and Tianzhu-Xinhuang.
引文
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