辽东南地区菱镁矿矿床成因研究  

Genesis of magnesite deposits in southeastern Liaoning

作　　者：蓝海洋 Lan Haiyang(Liaoning Metallurgical Geological Exploration Research Institute Co.,LTD,Anshan,114038,China)

机构地区：[1]辽宁省冶金地质勘查研究院有限责任公司,辽宁鞍山114038

出　　处：《化工矿产地质》2020年第1期37-41,65,共6页Geology of Chemical Minerals

摘　　要：辽东南地区是我国主要盛产菱镁矿产品基地之一,菱镁矿主要分布在辽宁省海城至大石桥一带。通过地质背景分析,研究菱镁矿的矿区、矿体地质特征和矿石质量特征,认为辽东南地区菱镁矿应属浅海相化学沉积碳酸盐岩建造,菱镁矿层的形成受特定古沉积环境控制,经区域变质重结晶作用或热力变质作用再次重结晶形成菱镁矿层。菱镁矿的形成是原生沉积与变质和变形作用的综合产物,矿床成因类型应属于沉积变质矿床。The area of southeast Liaoning is one of the main bases of magnesite mining in China,and magnesite is mainly distributed in the area from Haicheng to Dashiqiao in Liaoning province.Through the geological background analysis,the mining area,ore body geological characteristics and ore quality characteristics of magnesite are studied.It is considered that magnesite should be constructed by shallow marine chemical sedimentary carbonate rock in southeast Liaoning,and the formation of magnesite layer is controlled by specific paleo-sedimentary environment,and the magnesite layer is recrystallized by regional metamorphic recrystallization or thermal metamorphism to form magnesite layer.The formation of magnesite is a comprehensive product of primary deposition,metamorphism and deformation,and the genetic type of deposit should belong to sedimentary metamorphic deposit.

关 键 词：辽东南地区 菱镁矿 地质特征 矿床成因 

分 类 号：P619.237[天文地球—矿床学]