摘要
Abstract
Shuangshengmei deposit is located on the northern margin of the North China platform,in the middle of middle-late Proterozoic Baiyunebo rift trough,which is in the middle of the Langshan-Zhartai Mountains.The outcrop is mainly the middle Proterozoic Baiyunebo harajo group(Pt2byh).the lower lithology is feldspar-quartz sandstone with limestone and slate;The central lithology is quartz sandstone and interbedded limestone;The upper lithology is limestone with quartz sandstone and sandy slate.Gold is produced in the early compress-shearing fractures,the mainly mineralization and alteration is pyritized and limonitization.ore-forming process is flowing:in Paleoproterozoic,Langshan-Zhartai Mountains formed series of rift trough,and then cracking,in rift environment,formed the Baiyunebo group metallogenic system.Affected by indo-chinese epoch volcanic activity,magma formed a series of tensional fracture,magma remelted Baiyunebo harajo group(Pt2byh),late acidic magma carrying gold,silver and other useful elements changed into the low to moderate temperature hydrothermal fluid,along the early formation in the NNE,NEE and NNW faulted structural shatter zone,in part of the fracture zone occurred mineralization The acid magma of Yanshanian invaded again,and the early ore superimposed enrichment deposit on both sides with the magmatic hydrothermal.Accord to the geological characteristics,It is consider that this gold deposit is multiphase multisource hydrothermal gold,and the main prospecting directions.关键词
地质特征/金矿/矿床成因/找矿前景/双胜美/内蒙古Key words
Geological characteristics/gold/Cause of deposit/exploration prediction/Shuangshenmei/in Inner Mongolia分类
天文与地球科学
