| 东昆仑五龙沟金矿田控矿构造带的变形条件——来自EBSD组构的启示 |
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| 关键词:EBSD system petro-fabrics analysis deformation condition deformed rocks Yinshigou–Hongqigou structural zone Wulonggou gold orefield in Eastern Kunlun Mountains |
| 基金项目:中国地质调查局地质矿产调查专项(编号: 12120113096000) |
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| Deformation Conditions of Ore-controlling Structural Zone in the Wulonggou Gold Orefield, Eastern Kunlun Mountains:Evidence from EBSD Fabrics Analysis |
| The Wulonggou gold orefield is one of the most important gold ore concentration areas in Eastern Kunlun Mountains, and three brittle ore-controlling fault fracture zones are deformation late at a low-medium depth of 10~15 km and a low-middle of 250~350?C and under a low-middle pressure of 0.25~0.40 GPa. (4) There developed brittle fracture zone in Yanjingou zone and Sandaoliang–Kushuiquan zone. (5) Combined with the age of deformed granodiorite, the authors consider that the ductile deformation in the orefield occurred in early Mesozoic.developed in the orefield. i.e., Yanjingou zone, Yinshigou–Hongqigou zone and Sandaoliang–Kushuiquan zone. The ductile deformation is only outcropped in some areas near the northern side of the Yinshigou–Hongqigou structural zone. Based on the EBSD petro-fabrics analysis of deformed rocks from Yinshigou–Hongqigou structural zone of the Wulonggou gold orefield, the authors have drawn the conclusions as follows. (1) There happened a strong deformation of the rocks in some area near the northern side of the Yinshigou–Hongqigou structural zone in the orefield. (2) Quartz in most granitic mylotite samples was mainly deformed along its prismatic I glide system with a single deformation type, while quartz in partial samples was deformed along its prismatic II and basal or basal-near glide system. (3) The deformation of the mylotite occurred mostly at a medium and medium-great depth of 15~25 km, at a middle and med-high temperature of 350~550°C and under a middle pressure of 0.40~0.60 GPa, with only part of them being superimposed |
| CHEN Bai-lin,ZHANG Hao,CHEN Jian-lin,WANG Yong,WANG Tong,HAN Yu,ZHANG Yan-lin.2018.Deformation Conditions of Ore-controlling Structural Zone in the Wulonggou Gold Orefield, Eastern Kunlun Mountains:Evidence from EBSD Fabrics Analysis[J].Acta Geoscientica Sinica,39(1):1-13. |
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