湖南省邵阳县长阳铺地区锰矿矿床地质特征及成矿预测

Geological Characteristic and Metallogenic Prediction of Changyangpu Manganese Ore Deposit in Shaoyang County of Hunan Province

长阳铺锰矿矿床位于华南加里东褶皱带、祁阳弧形构造(祁阳山字型)中北部邵阳盆地内.预测区位于箍脚底向斜北东端扬起部位,为一不对称复式向背斜构造,总体走向北东,岩层产状较平缓,局部有倒转.矿石主要为氧化铁锰和碳酸铁锰矿二类,其中,Ⅰ矿层氧化锰在研究区内分布极不均匀;Ⅱ矿层为研究区主要赋矿层,在预测区北部老采坑点已见碳酸锰矿层,厚度为1.5 m以上,锰品位16.78%.推测研究区深部为碳酸铁锰矿.

Changyangpu manganese ore deposit, located in the caledonian fold belt of South China, is in the Shaoyang ba- sin of north-central Qiyang arc structure. The forecasting area, situated in the north east elevation of Gujiaodi syncline, is asymmetric anticlinorium, which is NE trending, and the attitude of stratum is quite gentle, but some areas are overturned. There are two main types of ores, namely the iron oxide manganese ore and the iron carbonate manganese ore. The distribu- tion of the manganese oxide in the Ⅰ seam is uneven. In the research area, the Ⅱ deposits is the mainly containing ore de- posits. The manganese carbonate ore has been found in the old mining pit at the north of the research area. This seam has more than 1.5m in thickness, and industrial grade is 16.78%. So, it can be predicted that the deeper part is the iron car- bonate manganese ore.