摘要
研究区位于北山裂谷系北缘,受星星峡断裂、红柳河断裂控制,形成了红柳河-盐滩锰矿成矿带,矿化主要赋存于下寒武统双鹰山组中,小独梁地区圈定了矿化带3个,矿体13条,成矿远景较好。通过元素地球化学分析,小独梁地区U/Th比值为0.77~3.89、V/Cr比值为0.41~31.7、Ni/Co比值为0.19~6.89、V/(V+Ni)比值为0.49~0.61,表明该地区锰矿的形成,是在一个从富氧-贫氧-缺氧的环境下进行的,经历了锰氧化物或氢氧化物形成阶段,碳酸锰可能是通过锰氧化物或氢氧化物转化而成的;SiO_(2)/Al_(2)O_(3)比值反映了物源可能来自洋壳深部;明显偏低的Ni/V比值,Al/(Al+Fe+Mn)比值反映了锰矿的形成与热水喷流关系密切,属于热水沉积的产物。
The study area is in the northern margin of Beishan Rift System,it is controlled by xingxingxia fault and Hongliuhe fault,and it forms hongliuhe-Yantan manganese ore belt,which mainly occurs in the Lower Cambrian Shuangyingshan Formation.Xiaoduliang area has delineated 3 mineralization zones and 13 ore bodies,with good metallogenic prospects.According to the elemental geochemical analysis,U/Th is 0.77~3.89,V/Cr is 0.41~31.7,Ni/Co is 0.19~6.89,V/(V+Ni)is 0.49~0.61,indicating that the manganese ore is formed in an oxygen-rich,oxygen-poor and anoxic environment.Manganese carbonate may be formed through the transformation of manganese oxide or hydroxide.The SiO_(2)/Al_(2)O_(3) ratio reflects that the provenance may come from the deep ocean crust.The obviously low Ni/V ratio and Al/(Al+Fe+Mn)ratio reflect that the formation of manganese ore is closely related to hot water jet flow and belongs to the product of hot water deposition.
作者
孙丹
刘珊珊
谭和勇
叶萍
SUN Dan;LIU Shanshan;TAN Heyong;YE Ping(Henan Institute of Geological Survey,Zhengzhou,Henan 450000,China;Henan Key Laboratory of Metal Mineral Geological Process and Resources Utilization,Zhengzhou,Henan 450000,China;Henan Institute of Geological Science,Zhengzhou,Henan 450000,China)
出处
《中国锰业》
2022年第4期23-28,共6页
China Manganese Industry
关键词
北山裂谷
小独梁锰矿
成矿地质特征
成因分析
Beishan Rift valley
Xiaoduliang manganese ore
Metallogenic geological characteristics
Cause analysis
