云南鹤庆锰矿控矿因素初步分析

永颉同心

摘　要：鹤庆锰矿产出于晚三叠世诺利期剧烈下陷的一个台沟环境。力学成因上，该台沟盆地属于走滑拉张型盆地。它的生成与西缘台褶带卡尼－诺利中期区域性南北向深大断裂带的右行走滑拉张活动有直接的关系。稀土和碳、氧同位素资料表明，成矿经由以玄武岩浆活动为代表的地热系统对盆地基底矿源层中锰质的萃取、生物吸收以热水喷流形式进入盆地的矿质而成矿的过程。总结出区域性深大断裂、玄武岩浆活动、矿源层三者为扬子地块西缘卡尼－诺利成锰期的控制因素。
关键词：鹤庆锰矿；走滑拉张盆地；控矿因素；深大断裂；矿源层
分类号：P611；618．32；P542　文献标识码：A
文章编号：1001-6872(2000)01-0030-37

ANALYSIS OF ORE-CONTROLLING FACTORS OF HEQIN MANGANESE DEPOSIT

YU Su-jun ,YANG Li-zhong ,LIU Dan
(College of Civil Engineering, Southwest Jiaotong University, Chengdu 610031)

Abstract：Heqin maganese deposit which was formed in an intensely decending platform trough environment during Norian of late Triassic, was closely related to the pull-apart basin induced by dextral strike slip of N-S trending deep fault zones in the western margin of Yangtz platform.The analysis of rare-earth elements and isotopes of C and O revealed that the mineralization expe-rienced such processes as the extraction of manganese from the source bed in the basement by means of basaltic lava activity, the biological absorption of manganese and the migration of ther-mal solution into the basin. As result, the activity of basaltic magma, the regional deep faults and the source bed were considered to be the major factors controlling the manganese mineraliza-tion in the western margin of Yangtz platform during Carian-Norian of late Triassic.
Keywords：strike-slip induced pull apart basin;ore-controlling factor;deep fault;source bed



基金项目：冶金地质(八五)锰矿地质科研项目(No 85－02－04－2)
作者简介：于苏俊 男 44岁 博士 环境科学专业 研究方向：环境工程及矿山地质
作者单位：于苏俊（西南交通大学土木学院，成都 610031）　
　　　　　杨立中（西南交通大学土木学院，成都 610031）　
　　　　　刘丹（西南交通大学土木学院，成都 610031）　

参考文献：

［1］Bluck B T. Evolution of a Strke-Slip Fault-Controlled Basin, Upper Old Red SandStone [C]. In: Spec Pule Int. Ass. Sediment. 1980.63～78.
［2］Jochen Hoefe. Isotopes and Mineral Genesis. In:Barnes, L (Ed). Geochemistry of Hydrothermal Ore Deposits [C]. 1976,176～500.
［3］陈智梁等.扬子地块西缘地质构造演化[M].重庆:重庆出版社,1987.32～207.

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