辽宁省刚家堡菱镁矿地质特征及找矿标志  

Geological Characteristics and Prospecting Marks of Gangjiapu Magnesite Ore in Liaoning Province

作　　者：李彬 Li Bin(Liaoning Non-ferrous Geological Exploration and Research Institute,Liaoning,110016)

机构地区：[1]辽宁有色勘察研究院有限责任公司,辽宁110016

出　　处：《当代化工研究》2025年第6期35-37,共3页Modern Chemical Research

摘　　要：辽宁省刚家堡菱镁矿赋存于辽河群大石桥岩组三段富镁碳酸盐建造中,其形成受古元古代裂谷构造及沉积-变质作用控制。研究表明,矿体呈层状或似层状展布,矿石以晶质菱镁矿为主,MgO、CaO和SiO_(2)分布受后期热液活动影响显著。矿床成因可归结为沉积-变质型,海退末期泻湖环境与古气候变迁是成矿关键因素。总结的找矿标志包括辽东古元古代裂谷构造背景、大石桥岩组第三岩段地层特征及菱镁大理岩与白云石大理岩共生组合。矿区深部及周边潜在资源量达1.7亿吨,具备进一步勘探价值。研究成果为区域菱镁矿资源评价及勘探部署提供了理论依据与实践指导。The Gangjiapu Magnesite Ore in Liaoning Province is hosted in the magnesium-rich carbonate formation of the third member of the Daishiqiao Formation within the Liaohe Group.Its formation was controlled by Paleoproterozoic rift structures and sedimentary-metamorphic processes.Research indicates that the ore bodies exhibit stratified or quasi-stratified distribution,with crystalline magnesite as the dominant mineral.While the distribution of MgO、CaO and SiO_(2)is significantly influenced by posterior hydrothermal activities.The genesis of the deposit is attributed to a sedimentary-metamorphic type,with lagoon environments during the late regression stage and paleoclimatic changes identified as critical factors for mineralization.Prospecting indicators include the tectonic background of the Paleoproterozoic rift in eastern Liaoning,stratigraphic characteristics of the third member of the Daishiqiao Formation,and symbiotic associations between magnesite marble and dolomite marble.The potential resource in the deep and peripheral areas of the mining district reaches 170 million tons,demonstrating significant potential for further exploration.These findings provide a theoretical foundation and practical guidance for regional magnesite resource evaluation and exploration strategies.

关 键 词：刚家堡菱镁矿 矿床成因 找矿标志 资源潜力 

分 类 号：P618[天文地球—矿床学]