| 广西巴马料屯金矿石英斑岩地球化学特征及成矿指示意义 |
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| 引用本文： | 李院强,庞保成,杨锋,张东伟,曾庆锋,刘旭,蒋新红.广西巴马料屯金矿石英斑岩地球化学特征及成矿指示意义[J].现代地质,2014,28(6):1138-1150. |
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| 作者姓名： | 李院强 庞保成 杨锋 张东伟 曾庆锋 刘旭 蒋新红 |
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| 作者单位： | (1.桂林理工大学 地球科学学院，广西 桂林541006；2.桂林理工大学 广西隐伏金属矿产勘查重点实验室，广西 桂林541006) |
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| 基金项目： | 国家自然科学基金项目(41362006);广西自然科学基金项目(2013GXNSFAA019275) |
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| 摘 要： | 料屯金矿是目前桂西北地区仅有的与石英斑岩空间上紧密相关的卡林型金矿，研究石英斑岩对成矿的指示意义，将有助于加深对该区卡林型金矿成因的认识，以期为该区找矿突破提供更多依据。通过对矿床地质特征和石英斑岩地球化学特征分析取得以下认识：石英斑岩属酸性岩类，钙碱性系列，具富钾、过铝质特征，属于重熔型岩浆岩；矿区成矿物质主要来源于三叠系地层，但不排除石英斑岩为金矿提供成矿物质的可能。野外地质特征和地球化学分析数据表明矿区至少存在2个阶段的成矿作用，在石英斑岩成岩前后都有成矿作用发生。石英斑岩在成岩后主要受构造剪切作用形成破碎裂隙带，后期含矿热液沿破碎裂隙带迁移并卸载成矿，使破碎裂隙带周围石英斑岩蚀变矿化，形成了矿化石英斑岩。国内外越来越多研究证据表明卡林型金矿的形成与岩浆活动有着密不可分的关系，矿区内燕山期石英斑岩的侵入可能与矿体形成有关，其为成矿作用提供成矿物质或成矿流体，还是只提供热源，需要进一步研究讨论。
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| 关 键 词： | 成矿指示 地球化学特征 石英斑岩 料屯金矿 巴马 广西 |
Geochemical Characteristics and Metallogenic Significance of Quart Porphyry in Liaotun Gold Deposit,Bama County,Guangxi |
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| LI Yuan-qiang,PANG Bao-cheng,YANG Feng,ZHANG Dong-wei,ZENG Qing-feng.Geochemical Characteristics and Metallogenic Significance of Quart Porphyry in Liaotun Gold Deposit,Bama County,Guangxi[J].Geoscience——Journal of Graduate School,China University of Geosciences,2014,28(6):1138-1150. |
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| Authors: | LI Yuan-qiang PANG Bao-cheng YANG Feng ZHANG Dong-wei ZENG Qing-feng |
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| Institution: | (1.College of Earth Sciences, Guilin University of Technology, Guilin, Guangxi541006, China；;
2.Guangxi Key Laboratory of Hidden Metallic Ore Deposit Exploration, Guilin University of Technology, Guilin, Guangxi541006, China) |
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| Abstract: | The Liaotun gold deposit, located in northwestern Guangxi, is the only gold deposit spatially closely related to quartz porphyry. The metallogenic significance study for quartz porphyry will be helpful in the recognition of the genesis of Carlin type gold deposit in this district, and will provide more basis on further prospecting. Based on the geological characteristics of the deposit and geochemical characteristics of quartz porphyry, the paper regards that the quartz porphyry rocks belong to acid rocks and calc-alkaline series, which have a feature of rich K and full Al，and belong to the remelting magmatite. The ore-forming materials may mainly derive from clastic rocks of Middle Triassic series, but we can not exclude the probability that the ore-forming materials derive from quartz porphyry. The geological characteristics of the field and the analysis data of geochemical indicate that there are at least two stages of mineralization in the ore field, and that the mineralization occurs before or after the diagenesis of quartz porphyry. Fracture zone were formed by structural shearing. The later ore thermal fluid transport, unload, and mineralize along the fracture zone; the alteration and the metallization occurs in quartz porphyry around the fracture zone, forming the mineralized quartz porphyry. Both in our country and abroad, there is growing evidence that the formation of Carlin type gold deposits are associated with the activities of the magma. In this district, the mineralization is probably related to the invasion of quartz porphyry in Yan-shanian; and it provides the ore-forming material, fluid, or heat source. These questions need further study and discussion. |
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| Keywords: | metallogenic significance geochemical characteristic quart porphyry Liaotun gold deposit Bama Guangxi |
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