| 朱江建,林舸,曾乔松.广东河台金矿滑痕线理与金矿体的关系及成矿意义[J].矿产勘查,2018,9(3):333-341 |
| 广东河台金矿滑痕线理与金矿体的关系及成矿意义 |
| Relationship between slip surfaces and auriferous orebodies and its metallogenic significance in the Hetai gold deposit, Guangdong |
| 投稿时间：2017-08-21 |
| DOI： |
| 中文关键词: 河台金矿 滑痕线理 糜棱岩 广东 |
| 英文关键词: the Hetai gold deposit, slip surface, mylonite,Guangdong |
| 基金项目:中国地质调查局综合地质调查项目(编号 :121201001000150010)资助。 |
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| 中文摘要: |
| 为了确定河台金矿的成矿动力学机制,文章研究了河台金矿滑痕线理与金矿体的关系。研究表明,两组滑痕线理均与金矿体有伴生关系；滑痕线理的两组侧伏角(10°～35°和42°～70°)与金矿体的两组侧伏角(20°～29°和45°～70°)一致；可能与滑痕线理形成有关的两组时间(187～192Ma和(141±6)～(157.1±1.0) Ma)与金矿体的两组形成时间(169～(175±4.3)Ma和(121.9±14.1)～(152.5±3.1)Ma)一致。以上研究表明,滑痕线理与金矿体有成因联系。结合前人研究成果,提出河台金矿沿滑痕线理发生滑动的减压过程中,很可能引发含金热液沿滑动方向的泵吸作用与减压沸腾成矿作用,进而决定了滑动方向控制了金矿体的延伸方向。脆—韧性剪切成矿期缓侧伏角的滑动作用(10°～35°)控制了缓侧伏角的矿体(20°～29°)；热液成矿期陡侧伏角的滑动作用(42°～70°)控制了陡侧伏角的矿体(45°～70°)。 |
| 英文摘要: |
| In order to find the mechanism of metallogenic dynamics of the Hetai gold deposit, this paper studied the relationship between auriferous orebodies and slip surfaces. Slip-marks on slip surfaces are always accompanied with auriferous orebodies. Plunge angles(10°-35° and 42°-70°)of Slip-marks on slip surfaces are consistent with plunge angles(20°-29° and 45°-70°) of auriferous orebodies. Formation times(187-192Ma and(141±6)-(157.1±1.0)Ma)of Slip-marks on slip surfaces are consistent with formation times(169-(175±4.3)Ma and(121.9±14.1)-(152.5±3.1) Ma) of auriferous orebodies. All of this, indicated slip surfaces and auriferous orebodies have close relationship in the formation. It is proposed that the pressure reducing in the process of sliding was likely accompanied with pumping process and mineralization, which support glide directions controlled the directions of auriferous orebodies. Glide directions of low pitching angles(10°-35°) controlled the auriferous orebodies of low pitching angles(13°-34°) in mineralization epoch of brittle-ductile shearing deformation, and glide directions of steep pitching angles(42°-70°) controlled the auriferous orebodies of steep pitching angles(45°-70°) in hydrothermal mineralization epoch. |
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