寿山大山石矿物学特征及成因初探

周武邦, 王朝文, 严雪俊, 陈涛, 严俊

周武邦, 王朝文, 严雪俊, 陈涛, 严俊. 寿山大山石矿物学特征及成因初探[J]. 宝石和宝石学杂志(中英文), 2024, 26(S1): 83-85.
引用本文: 周武邦, 王朝文, 严雪俊, 陈涛, 严俊. 寿山大山石矿物学特征及成因初探[J]. 宝石和宝石学杂志(中英文), 2024, 26(S1): 83-85.
ZHOU Wubang, WANG Chaowen, YAN Xuejun, CHEN Tao, YAN Jun. Mineralogical Characteristic of Dashan Stone from Shoushan and Its Genesis[J]. Journal of Gems & Gemmology, 2024, 26(S1): 83-85.
Citation: ZHOU Wubang, WANG Chaowen, YAN Xuejun, CHEN Tao, YAN Jun. Mineralogical Characteristic of Dashan Stone from Shoushan and Its Genesis[J]. Journal of Gems & Gemmology, 2024, 26(S1): 83-85.

寿山大山石矿物学特征及成因初探

基金项目: 

浙江省市场监督管理局科研计划项目 ZC2021A038

国家自然科学基金项目 42072056

浙江省非金属矿工程技术研究中心开放课题 ZD2020K02

详细信息
    作者简介:

    周武邦(1997-),男,主要从事宝玉石检测及相关研究工作。E-mail:zhou_wubang@163.com

    通讯作者:

    王朝文(1986-),男,副教授,主要从事宝石学方面的教学和研究工作。E-mail:c.w.wang@cug.edu.cn

Mineralogical Characteristic of Dashan Stone from Shoushan and Its Genesis

  • 摘要:

    矿物学特征对矿床成因的研究具有重要指示意义。为探究寿山大山石的矿物学特征及成因,本研究利用偏光显微观察、X射线粉末衍射、拉曼光谱及电子探针等表征方法,对寿山大山石的矿物学特征进行了深入研究,并依据矿物学特征探讨了流体性质、形成环境及温度。结果显示,寿山大山石的主要矿物组成为高岭石和迪开石,部分为叶腊石,次要矿物为石英、黄铁矿、赤铁矿、锐钛矿和金红石等,部分矿物(如黄铁矿等)表面可见溶蚀现象。拉曼光谱及电子探针结果显示,寿山大山石中锐钛矿、金红石、黄铁矿的存在均与岩浆热液有关,而黄铁矿中As与S和Fe的负相关及表面溶蚀现象,指示成矿流体应先经历了还原环境又经历了氧化环境。依据寿山大山石主要矿物组合及Al2O3-SiO2-H2O体系矿物的相变温压条件,得出大山石矿物组合达到稳定时温度约为250~270 ℃。

    Abstract:

    Mineralogical characteristics have significant indicative importance in the study of the genesis of ore deposits. To investigate the mineralogical characteristics and genesis of Dashan stone from Shoushan, this study utilized polarizing microscopy, X-ray powder diffraction, Raman spectroscopy, and electron microprobe analysis to conduct an in-depth investigation of the mineralogical features. Based on these characteristics, the fluid properties, formation environment, and temperature were discussed. The main minerals of Dashan stone from Shoushan are kaolinite and dickite, with some pyrophyllite; the secondary minerals include quartz, pyrite, hematite, anatase, rutile, and ilmenite, among others. Some minerals, such as pyrite, show signs of surface dissolution. The Raman spectra and electron microprobe results indicate that the presence of anatase, rutile, and pyrite in Dashan stone from Shoushan is related to magmatic hydrothermal fluids. The negative correlation between As and S and Fe in pyrite, along with the dissolution phenomena on its surface, suggest that the ore-forming fluids experienced a reduction environment followed by an oxidation environment. Based on the main mineral assemblage of Dashan stone from Shoushan and the phase change temperature-pressure conditions of the Al2O3-SiO2-H2O system, it is concluded that the stable temperature for the mineral assemblage of Dashan Stone is approximately 250-270 ℃.

  • 表  1  黄铁矿Fe/(S+As)值与其产出部位的关系
    Table  1.  The relationship between the Fe/(S+As) ratio of pyrite and its occurrence location
    产地 产出部位 矿石类型 平均值
    Fe/% S/% As/% Fe/(S+As)
    前苏联(周学武,2004) 深部 石英脉型 45.615 52.350 1.550 0.846
    中部 细脉浸染型 45.720 51.680 1.280 0.863
    浅部 石英脉型 46.565 49.775 0.505 0.926
    寿山大山石 粒状 44.660 52.180 1.020 0.840
    下载: 导出CSV 
    | 显示表格
    图  1  寿山大山石样品的偏光显微特征: (a) 单偏光下大山石的隐晶质结构;(b) 正交偏光下石英脉穿插于高岭石基质中;(c) 反射光下流纹状构造;(d) 反射光下黄色寿山大山石样品中的黄色脉状矿物沿裂隙分布;(e) 反射光下黄铁矿溶交代锐钛矿;(f) 反射光下晶体的溶蚀空洞及溶蚀凹坑
    Figure  1.  Polarizing microscopic characteristics of Dashan stone samples from Shoushan: (a) plane-polarized light, the cryptocrystalline structure; (b) cross-polarized light, quartz veins interspersed within the kaolinite matrix; (c) reflected light, flow pattern structure; (d) reflected light, yellow vein minerals in the yellow sample distributed along the fractures; (e) reflected light, pyrite replacing anatase; (f) reflected light, dissolution cavities and etch pits in the crystals
    图  2  寿山大山石样品的矿物组合及可能的形成温度
    Figure  2.  Mineral assemblage and possible formation temperature of Dashan stone samples from Shoushan
  • 图  1   寿山大山石样品的偏光显微特征: (a) 单偏光下大山石的隐晶质结构;(b) 正交偏光下石英脉穿插于高岭石基质中;(c) 反射光下流纹状构造;(d) 反射光下黄色寿山大山石样品中的黄色脉状矿物沿裂隙分布;(e) 反射光下黄铁矿溶交代锐钛矿;(f) 反射光下晶体的溶蚀空洞及溶蚀凹坑

    Figure  1.   Polarizing microscopic characteristics of Dashan stone samples from Shoushan: (a) plane-polarized light, the cryptocrystalline structure; (b) cross-polarized light, quartz veins interspersed within the kaolinite matrix; (c) reflected light, flow pattern structure; (d) reflected light, yellow vein minerals in the yellow sample distributed along the fractures; (e) reflected light, pyrite replacing anatase; (f) reflected light, dissolution cavities and etch pits in the crystals

    图  2   寿山大山石样品的矿物组合及可能的形成温度

    Figure  2.   Mineral assemblage and possible formation temperature of Dashan stone samples from Shoushan

    表  1   黄铁矿Fe/(S+As)值与其产出部位的关系

    Table  1   The relationship between the Fe/(S+As) ratio of pyrite and its occurrence location

    产地 产出部位 矿石类型 平均值
    Fe/% S/% As/% Fe/(S+As)
    前苏联(周学武,2004) 深部 石英脉型 45.615 52.350 1.550 0.846
    中部 细脉浸染型 45.720 51.680 1.280 0.863
    浅部 石英脉型 46.565 49.775 0.505 0.926
    寿山大山石 粒状 44.660 52.180 1.020 0.840
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-07-14
  • 刊出日期:  2024-10-30

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