“内生外成”论贵州省黑色岩系钒矿成矿特征

Metallogenic characteristics of the black rock series vanadium deposits in Guizhou province

通过大量野外调查、搜集资料等工作,对贵州省岩相古地理环境中黑色岩系钒矿矿床地质特征、岩石化学特征及成矿模式等进行综合研究,认为在黔东(北)地区的黄平—铜仁一带的下寒武统黑色岩系中钒矿成矿特征具“内生外成”特点;是南华系—早古生代中期扬子陆块与江南古陆汇聚背景的盆地次级裂陷扩展期的沟—弧—盆格局,随着多期次的岩浆活动带来的深源性成矿物质,提出了不同地质背景、时期及成矿物源的“内生外成”成矿系统——锰、磷、重晶石、铅锌、汞及镍钼钒矿等大型—超大型矿集区;其中下寒武统陆缘碎屑、海底火山喷流、热卤水及古生物活动等共同作用下的含钒沉积建造,在有利地段富集的钒矿床;该研究成果对贵州黑色岩系寻找大型—超大型钒矿具有指导意义。

Based on a large number of field investigations and data collection,this paper makes a comprehensive study of the geological characteristics,petrochemical characteristics and metallogenic model of the vanadium deposits in the black rock series in the lithofacies paleogeographic environment of Guizhou province.It is believed that the metallogenic characteristics of the vanadium deposits in the lower Cambrian black rock series in the Huangping Tongren area in the East(North)of Guizhou province are"the upper mantle origin and exogenous".It is the trench arc basin pattern of the secondary rifting extension period of the basin with the convergence background of the Yangtze block and the Jiangnan ancient land in the middle of the South China system early Paleozoic,and the deep-seated ore-forming materials brought about by the multi-stage magmatic activities.It also puts forward the"the upper mantle origin and exogenous"of different geological backgrounds,periods and ore-forming materials,the ore-forming system of"mineralization"-large-scale and super large ore concentration areas such as manganese,phosphorus,barite,lead-zinc,mercury and nickel molybdenum vanadium deposits;among them,the vanadium bearing sedimentary formation under the joint action of the continental margin clasts of the lower Cambrian,submarine volcanic exhalation,hot brine and paleontological activities,enriches the vanadium deposits in favorable areas.The research results have guiding significance for the exploration of large-scale and super large-scale vanadium deposits in the black rock series of Guizhou province.