贵州遵义市深溪隐伏富锰矿床主要地质特征

The main geological characteristics of the concealed manganese-rich depositin Shenxi,Zunyi,Guizhou Province

位于贵州遵义国家锰矿整装勘查区内的深溪隐伏富锰矿床,是贵州省内首次发现的二叠纪富锰矿床,提交(332)+(333)资源量1178万吨,锰平均品位为26.98%,矿体平均厚度为2.47 m,矿体赋存于二叠系茅口组第三段。矿石矿物以菱锰矿为主,斑杂状、浸染状和角砾状构造。成因类型为“内生外成气液喷溢沉积型”锰矿床,富锰矿产于喷溢沉积成矿系统的中心相区,深溪富锰矿床地处茅口晚期深溪Ⅳ级地堑盆地中心。地表为燕山期形成的NNE向断层和EW向展布的虾子复向斜,对深部锰矿体未造成影响,富锰矿体保存十分完整,目前尚未圈边,深部仍具有较大的找矿潜力。

Shenxi concealed manganese-rich deposit is located in the national manganese exploration area of Zuny,Guizhou Province.It is the first Permian manganese-rich deposit discovered in Guizhou Province.The submitted(332)+(333)mineral resources are 11.78 million tons,the average manganese grade is 26.98%,and the average thickness of the orebody is 2.47 m.The orebody is hosted in the third section of Maokou Formation of Permian.The ore mineral is mainly rhodochrosite with mottled,disseminated and brecciated structures.The genetic type is"endogenetic and exogenetic gas-liquid exhalation sedimentary type"manganese deposit.The manganese-rich orebody is located in the central face area of exhalation sedimentary metallogenic system.Shenxi manganese-rich deposit is located in the center of Shenxi Level IV graben basin in the late Maokou period.In the surface there are the NNE fault formed in Yanshan period and the Xiazi synclinorium in EW direction,which have no impact on the deep manganese orebody.The manganese rich orebody is well preserved and has not yet been encircled.There is still a great prospecting potential in the deep part.