鄂西北下寒武统黑色岩系中的钒矿床

早寒武世黑色岩系中蕴藏丰富的有色金属、贵金属、稀土金属、石煤及非金属矿产。其中,位于扬子板块北缘的南秦岭褶皱带下寒武统钒矿资源潜力巨大,笔者以鄂西北为例,探讨该类钒矿床地质特征、成矿规律及成矿条件。鄂西北钒矿床产于下寒武统底部富含有机质的炭、硅、泥质黑色岩系中。矿层形态简单,产状稳定,埋藏浅,分布广,储量大。成矿受地层、岩性、古构造和古地理条件控制。钒矿床初始富集属受制于生物―化学成矿作用,后期构造改造作用对矿化分布及富集有一定的影响。认为鄂西北钒矿床具有生物成矿与海底热水沉积成矿双重特征,矿床成因类型应归属于生物化学沉积―变质改造型矿床范畴。

The vanadium deposit in lower Cambrian black rock series in northwest Hubei

The black rock series in the early Cambrian of our country are rich in non-ferrous metals,precious metals,rare earth metals,coal and non metal mineral.Among these,in South Qinling Mountains fold lower Cambrian vanadium deposit resource potential is tremendous,which is located in the northern margin of the Yangtze plate.Taking the northwest of Hubei province as an example in this paper,the vanadium deposit geological characteristics,metallogenic regularity and metallogenic conditions were discussed.Northwest of Hubei vanadium deposit is produced in the lower Cambrian rich in organic carbon,silicon,mud in black rock series.The main layer is stratiform,bedded,simple form,the stability of the occurrence,buried in shallow,wide distribution,large reserves.Mineralization is controlled by strata,lithology,tectonic and paleogeographic conditions.The initial concentration of vanadium deposit is subject to the chemical biological mineralization,later tectonic reworking has some influence on the distribution of mineralization and enrichment.So this result indicates that the northwest of Hubei vanadium rich deposit has the dual characters of biological mineralization and submarine hydrothermal sedimentary mineralization,the deposit genetic type shall be attributed to the deposit area of the biochemical sedimentary metamorphism-reformed deposit category.