元谋变质核杂岩南部韧性剪切带特征及石墨矿化
CHARACTERISTICS OF DUCTILE SHEAR ZONE AND GRAPHITE MINERALIZATION IN THE SOUTH OF YUANMOU METAMORPHIC CORE COMPLEX
包大林 1杜小波 1廖志凯 1杨宇1
作者信息
- 1. 云南省核工业二○九地质大队,云南昆明 650032;云南省三稀矿产资源勘查评价工程研究中心,云南昆明 650032
- 折叠
摘要
通过元谋变质核杂岩南部地质调查及钻探工作,识别出 4 条韧性剪切带,宏观特征有糜棱岩及糜棱岩化岩石、拉伸线理、S-C组构、尖棱褶皱等,微观特征有石英动态重结晶、旋转碎斑、不对称压力影、云母鱼及微观尖棱褶皱等.已施工钻孔数据表明韧性剪切带范围为晶质石墨矿体良好容矿部位.
Abstract
Four ductile shear zones have been identified through the geological survey and drilling work in the southern part of the Yuanmou metamorphic core complex.The macroscopic features of them include mylonite and mylonitized rocks,stretching lineation,S-C fabric,sharp-edged folds,etc,whereasthe microscopic features include quartz dynamic recrystallization,rotational porphyroclasts,asymmetric pressure shadows,mica fish and microscopic sharp-edged folds.The drilling data show that the ductile shear zone is a good ore-bearing space of the crystalline graphite ore body.
关键词
变质核杂岩/韧性剪切带特征/石墨矿化/云南元谋Key words
Metamorphic Core Complex/Characteristics of Ductile Shear Zones/Graphite Mineralization/Yuanmou,Yunnan引用本文复制引用
基金项目
2022年度云南省地质勘查基金项目(D202203)
出版年
2024
NETL
NSTL
万方数据