| 余何,汪劲草,康皓钰,张梓贺,黄冠文,王旭阳.广东河台金矿床氢氧同位素特征及其地质意义[J].矿产勘查,2018,9(1):55-61 |
| 广东河台金矿床氢氧同位素特征及其地质意义 |
| Characteristics of hydrogen and oxygen isotopes and their geological significance in Hetai gold deposit, Guangdong |
| 投稿时间：2017-02-13 |
| DOI： |
| 中文关键词: 氢氧同位素 成矿流体 成矿构造 矿床成因 广东河台 |
| 英文关键词: hydrogen and oxygen isotopes, ore-forming fluid, ore-forming structure, genesis of deposit, Hetai of Guangdong |
| 基金项目:国家自然科学基金(编号:41172089)、广西自然科学基金项目(编号:2016GXNSFAA380129)、有色及贵金属隐伏矿床勘查教育部工程研究中心项目(编号:2015GCZX001)共同资助。 |
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| 中文摘要: |
| 广东河台金矿床是我国华南地区目前已发现的最大金矿床,也是与韧性剪切带有关的典型金矿床。为了给深边部的找矿提供新资料,文章对该矿床中石英脉型金矿石与蚀变糜棱岩型金矿石进行了氢氧同位素分析,结果显示其成矿流体具有多源性,是岩浆热液—变质热液—大气降水的混合流体体系。基于成矿构造的认识,认为其成矿流体的多源混合是河台深层次大型剪切带从深部韧性域往浅部脆-韧域及脆性域变质变形过程中,构造-流体作用多阶段耦合成矿的直接响应。初步提出河台金矿"韧性剪切带3阶段构造成矿"的思路,这对理解河台金矿的成因具有新的启示意义。 |
| 英文摘要: |
| Hetai gold deposit is the currently discovered largest gold deposit in southern China, and is a typical gold deposit that related to ductile shear zone, too. In order to provide new information for prospecting, this paper studies the hydrogen and oxygen isotopic composition of quartz-vein-type gold ore and altered mylonite-type gold ore. The results show that the ore-forming fluid is heterogeneous, which is a mixed fluid system of magmatic hydrotherm, metamorphic hydrotherm and atmospheric water. Based on the analysis of metallogenic structure, this paper considers that the heterogeneous mixture of the ore-forming fluid is an inevitable product of the multi-stage coupling mineralization of structure-fluid action during the metamorphic deformation process of Hetai large-scale shear belt uplifted from deep ductile domain to shallow brittle-ductile domain and brittle domain. A new thought of “Three Stages of Tectonic Mineralization in Ductile Shear Zone” is proposed, which is of significance to understand the genesis of Hetai gold deposit. |
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