| 刘云,周守余,李莉,徐文杰,蒙有言,蒙成禹,陈晓锋.桂北全州县里出元矿区脆-韧性剪切带的发现及其找矿意义[J].矿产勘查,2021,12(10):2035-2042 |
| 桂北全州县里出元矿区脆-韧性剪切带的发现及其找矿意义 |
| Discovery of brittle-ductile shear zone in Lichuan mining area of Quanzhou County in northern Guangxi and its prospecting signi.cance |
| 投稿时间：2020-11-18 |
| DOI： |
| 中文关键词: 脆-韧性剪切带 金矿 地质调查工程 里出元 |
| 英文关键词: brittle-ductile shear zone gold deposit geological survey Lichuyuan |
| 基金项目:本文受广西壮族自治区自然资源厅2019—2020年地质科研项目“桂北金矿成矿规律与找矿前景研究”(桂自然资函〔2019〕2403号)和中国有色集团科技计划项目“中国有色矿业集团矿山资源现状调查与找矿潜力分析”(2019KJJH02)联合资助。 |
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| 中文摘要: |
| 全州县里出元金矿发育于奥陶系浅变质的碎屑岩系内，区内断裂构造发育。经过地质调查在矿区发现I号、II号和III号3条NE走向的脆-韧性剪切带，沿剪切带发育金矿化，Au品位为0.8×10-6~2.34×10-6，潜在Au金属量约4 t。通过系统的野外调查和镜下鉴定确定I号矿化带为脆性剪切带，II号和III号矿化带为脆-韧性剪切带，发育典型证明脆-韧性剪切带特征:带状石英、石英的波状消光、S-C组构和旋转残斑，上述发现对指导桂北地区实现金矿找矿突破具有现实的指导意义。 |
| 英文摘要: |
| The Lichuayuan gold deposit in Quanzhou County is developed in the Ordovician low metamorphic clastic rock series, and fault structures are developed in the area. Through geological survey, three NE trending brittle-ductile shear zones I, II and III were found in the mining area. Gold mineralization developed along the shear zone, with gold content of 0.8×10-6~2.34×10-6 and potential gold resources of about 4t. Through systematic field investigation and microscopic identification, No. I is identified as brittle shear zone, No. II and No. III mineralization zones are identi.ed as brittle-ductile shear zone. The typical development of brittle-ductile shear zone proves the existence of evidence: banded quartz, wavy extinction of quartz, S-C fabric and rotational remnant. The above .ndings have practical signi.cance for guiding the realization of gold prospecting breakthrough in northern Guangxi. |
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