黔北—滇东二叠纪锰矿主要成矿规律与成矿区带划分

Main Metallogenic Regularity and Metallogenic Zone Division of Permian Manganese Deposits in Northern Guizhou-Eastern Yunnan Province

这是一篇地球科学领域的论文。锰矿为我国十分紧缺的战略矿产之一。黔北-滇东地区是我国二叠纪锰矿最典型的分布区,在全球晚古生代也较为少见,该区锰矿资源丰富,找矿潜力巨大,称为“遵义式锰矿”。研究表明,该区锰矿产于二叠纪茅口晚期,分布严格受黔北裂谷盆地控制,锰矿在地堑盆地中心喷溢沉积成矿,在地垒区则无锰矿分布,矿体空间展布方向与盆地展布方向基本一致。其中,黔北遵义-黔西地区锰矿在空间上分布于盆地相区,并可分为中心相、过渡相、边缘相等三个锰矿相带,进一步指示了锰矿具体成矿位置,显示了锰矿受盆地中心控制非常明显的特点。在划分的遵义-宣威锰矿成矿带的基础上,详细划分出遵义-黔西锰矿成矿亚带中深溪—八里、龙坪—兴隆、团溪—尚稽、黔西4个锰矿矿集区,以及水城-宣威锰矿成矿亚带中水城—纳雍、格学2个锰矿矿集区。该研究成果对寻找黔北—滇东二叠纪隐伏锰矿床,开展成矿预测,具有重要的意义。

This is an article in the field of earth sciences.Manganese ore is one of the strategic minerals in short supply in China.The area of Northern Guizhou-Eastern Yunnan is the most typical distribution area of manganese ore in Permian,which is also rare in the Late Paleozoic in the world.It is rich in manganese ore resources and has great prospecting potential,so it is called"Zunyi type manganese ore".The results show that the manganese ore is produced in the late Permian Maokou,and its distribution is strictly controlled by the northern Guizhou rift basin.The manganese ore is formed in the center of graben basin by exhalation deposition,but no manganese ore is distributed in the barrier area,and the ore-body spatial distribution direction is basically consistent with the basin distribution direction.Among them,manganese ore in Zunyi-western Guizhou area is spatially distributed in the basin facies area,and can be divided into three manganese ore facies belts,namely,the central phase,the transition phase and the edge,which further indicates the specific metallogenic location of manganese ore and shows that the manganese ore is controlled by the center of the basin.Based on the Zunyi-Xuanwei manganese ore belt,it can be divided into four manganese ore concentration areas in the Zunyi-Qianxi manganese ore mineralization subzone:Shenxi-Bali,Longping-Xinglong,Tuanxi-Shangji and Qianxi,and two manganese ore concentration areas in shuicheng-Xuanwei manganese ore mineralization subzone:Shuicheng-Nayong and Gexue.The research results are of great significance to search for Permian concealed manganese deposits in northern Guizhou and eastern Yunnan and to carry out metallogenic prediction.