黎华,黄凡,周伟金,等. 广西贵金属矿产资源特征、成矿规律与找矿方向[J]. 中国矿业,2024,33(8):225-237. DOI: 10.12075/j.issn.1004-4051.20241352
    引用本文: 黎华,黄凡,周伟金,等. 广西贵金属矿产资源特征、成矿规律与找矿方向[J]. 中国矿业,2024,33(8):225-237. DOI: 10.12075/j.issn.1004-4051.20241352
    LI Hua,HUANG Fan,ZHOU Weijin,et al. Resource characteristics, metallogenic regularity and prospecting direction of precious metal minerals in Guangxi[J]. China Mining Magazine,2024,33(8):225-237. DOI: 10.12075/j.issn.1004-4051.20241352
    Citation: LI Hua,HUANG Fan,ZHOU Weijin,et al. Resource characteristics, metallogenic regularity and prospecting direction of precious metal minerals in Guangxi[J]. China Mining Magazine,2024,33(8):225-237. DOI: 10.12075/j.issn.1004-4051.20241352

    广西贵金属矿产资源特征、成矿规律与找矿方向

    Resource characteristics, metallogenic regularity and prospecting direction of precious metal minerals in Guangxi

    • 摘要: 广西贵金属矿产以金、银和铂为主,资源较为丰富,共发现金矿产地283处,累计查明资源量621.015 39 t;银矿产地184处,累计查明资源量23 347.64 t;伴生铂矿产地1处。矿床类型复杂多样,独立金矿以浅成中-低温热液型为主,岩浆热液型和陆相火山岩型次之;银矿以共伴生矿床为主,常与铅锌金同体共伴生;铂矿以微细粒浸染型金伴生铂为主。成矿时代上,金银矿既有成矿期次多、时间跨度长的特点,又有集中爆发成矿的特征,均以燕山期最为主,形成了广西主要的大、中型金银矿床。空间分布上,金银矿以地域性集中分布为特征,且明显受构造和岩浆岩控制,常沿区域性断裂/褶皱成群、成带分布或沿岩体与围岩的内外接触带分布,寒武系和三叠系是主要的赋矿层位。通过对广西贵金属区域成矿地质条件和资源潜力分析,圈定了成矿远景区,其中,金矿划分出13个成矿远景区,银矿划分出8个成矿远景区,预测资源量分别为1 033 t和77 655 t,表明金银矿仍有较大的找矿潜力。广西具有铂高背景值,成矿条件良好,应注意基性-超基性岩的评价,以及微细粒浸染型金矿种伴生铂的评价,同时也要注意新类型铂矿的查找,如与黑色岩系有关的铂矿床。

       

      Abstract: The precious metal minerals in Guangxi are mainly gold, silver and platinum, with relatively rich resources. There are 283 gold mineral deposits discovered in Guangxi with 621.015 39 t of cumulative identified resources, 184 silver mineral deposits with 23 347.64 t of cumulative identified resources, and one associated platinum mineral deposit with 6.667 t of associated identified resources. The deposit types are complex and diverse. The independent gold deposits are dominated by epigenetic medium-low temperature hydrothermal type, followed by magmatic hydrothermal type and continental volcanic type. Silver deposits are mainly associated deposits, often associated with lead, zinc and gold. Platinum is mainly produced in micro-fine disseminated gold deposits. In terms of the metallogenic age, the gold and silver deposits have the characteristics of multiple metallogenic stages, long time span, and concentrated mineralization, with the Yanshan Stage being the most important, forming the main large and medium gold and silver deposits in Guangxi. In terms of spatial distribution, the gold and silver deposits are characterized by regional concentrated distribution and are obviously controlled by regional structures and magmatic rocks. They are usually controlled by regional faults/folds or the inner and outer contact zones between rock mass and surrounding rock and developed into clusters or belts. The Cambrian and Triassic are the main ore-bearing layers. By analyzing the region geological mineralization conditions and resource potential of the precious metals of Guangxi, 13 gold metallogenic prospective areas and 8 silver metallogenic prospective areas have been circled, with 1 033 t and 77 655 t predicted resources, respectively, indicating that there is still a large prospecting potential for gold and silver. There is high background value of platinum and favorable metallogenic conditions in Guangxi, the evaluation of the basic-ultrabasic rocks and micro-fine disseminated gold species should be paid to attention, as well as to the search for new types of platinum deposits, such as platinum deposits related to black rock series.

       

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