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| 基金项目：甘肃金塔县地方财政项目“金塔县芨芨台子南大理岩矿、老虎山西大理岩矿、单面红山花岗岩矿详查”（jtzfcg202402040002） |
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| 摘要： |
| 对甘肃金塔单面红山花岗岩矿矿体与矿石特征、找矿标志、矿床成因进行了研究。该矿床地处甘肃北山造山带东部的中酸性岩体中，矿区岩浆活动强烈，赋矿岩性为加里东晚期中细粒英云闪长岩，属岩浆岩型饰面用花岗岩矿床；矿体主节理裂隙呈北北东、北东向，多为剪性节理，线裂隙率＜2.5条/m，次级节理裂隙在深部呈楔形尖灭或延出矿区，矿体节理、裂隙的发育对后期矿床的开发利用影响较小；矿石的物理性能和质量满足《饰面石材矿产地质勘查规范》要求，综合考虑花色和装饰性，将矿石品种定为“金钻白麻”，属中高档饰面用石材，品类属于A类。研究成果可为该矿后期矿山建设和该地区同类矿床的开发利用提供参考。 |
| 关键词：饰面用花岗岩矿 地质特征 矿床成因 单面红山 甘肃金塔 |
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| Abstract: |
| A study was conducted on the ore body and ore characteristics, prospecting indicators, and genesis of the Jinta single-sided Hongshan granite deposit. The deposit is located within an intermediate-acid intrusive rock mass in the eastern part of the Beishan Orogenic Belt, Gansu Province. The mining area exhibits intense magmatic activity, and the host rock is a Late Caledonian medium-fine-grained granodiorite, classifying it as a magmatic rock-type ornamental granite deposit. The main joints and fractures of the ore body trend NNE and NE, are mostly shear joints, and have a linear fracture density of <2.5 fractures per meter. Secondary joints and fractures wedge out at depth or extend beyond the mining area. The development of joints and fractures within the ore body has a minor impact on the future exploitation and utilization of the deposit. The physical properties and quality of the ore meet the requirements specified in the ″Geological Exploration Specification for Face Stone Minerals″. Considering both its colour pattern and decorative appeal, the ore variety is classified as ″Gold Diamond White Hemp″, a medium-to-high-grade ornamental stone categorized as Class A. The research findings can provide references for subsequent mine construction at this deposit and for the development and utilization of similar deposits in the region. |
| Keywords:facing granite deposit geological characteristic deposit genesis single-sided Hongshan Jinta, Gansu |
| 田 轲，吴玉雯.甘肃金塔单面红山饰面用花岗岩矿地质特征与成因[J].地质学刊,2025,49(4):394-405 |
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