摘要
敦煌地块多坝沟一带敦煌岩群的变质作用研究较少,笔者从岩相学方面对其做了总结与研究。该区区域变质岩分布广泛,岩石类型主要为片麻岩和片岩。动力变质岩发育有碎裂岩系和糜棱岩系,碎裂岩系列有构造角砾岩和碎裂岩;糜棱岩系列岩石有糜棱岩化岩石、初糜棱岩、糜棱岩和变余糜棱岩。多坝沟金矿区具有断裂带自中心向外围的碎裂岩带-糜棱岩带-变余糜棱岩带分带模式。
We summarized the petrography to understand the metamorphism of the Dunhuang group from the Duobagou area of Dunhuang massif due to it is rarely studied.The regional metamorphic rocks in this area are widely distributed and mainly gneisses and schists.Dynamic metamorphic rocks include cataclastic series and mylonite series.The cataclastic series containing tectonic breccia and cataclasite,while the mylonite series containing mylonitic rocks,protomylonites,mylonite and blastomylonite and the deformation and metamorphism conditions of the mylonites.
作者
张兵兵
ZHANG Bing-bing(Geological Survey of Gansu Province,Lanzhou 730000,China)
出处
《世界有色金属》
2020年第13期116-117,共2页
World Nonferrous Metals
基金
甘肃省省级基础地质调查项目“甘肃省多坝沟地区1:5万矿产远景调查”(20151616)资助。
