| 锅盔山石墨矿床变质特征与碳质来源 |
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| 作者姓名： | 刘成龙 于俊博 董峰 马慧如 杨金超 |
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| 作者单位： | 1.黑龙江省第五地质勘查院,哈尔滨 150036;2.中国地质调查局哈尔滨自然资源综合调查中心,哈尔滨 150001 |
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| 基金项目： | 黑龙江省财政专项“黑龙江省宝清县锅盔山石墨矿普查(编号:KCZX-SMKC-2016002)”项目资助。 |
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| 摘 要： | 黑龙江省锅盔山石墨矿床为近年新发现的超大沉积变质型石墨矿床,对该矿床变质作用特征与过程以及碳质来源的研究仍属空白。通过岩石学、岩石化学、碳同位素组成等研究,对矿区赋矿变质岩进行了原岩恢复,并探讨了岩石变质特征和矿床成因。研究认为: 该区变质岩变质程度达高角闪岩相,并经历了等温降压退变质作用,矽线石形成于熔体结晶; 原岩为一套具孔达岩系特征的浅海—滨海相碳硅泥岩建造,具太古宙古大陆与元古宙稳定沉积物的双重信息; 成矿物质来源为有机碳,属有机成因。研究成果对在该地区寻找同类型矿床具有一定的指导意义。
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| 关 键 词： | 锅盔山 石墨矿床 变质程度 孔达岩系 矿床成因 |
| 收稿时间： | 2020-05-26 |
Metamorphic characteristics and carbon origin of Guokuishan graphite deposit |
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| Authors: | LIU Chenglong YU Junbo DONG Feng MA Huiru YANG Jinchao |
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| Institution: | 1. The Fifth Institute of Geological Exploration of Heilongjiang Province, Harbin 150036, China;2. Harbin Comprehensive Survey Center of Natural Resources, China Geological Survey, Harbin 150001, China |
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| Abstract: | The Guokuishan graphite deposit in Heilongjiang Province is a large newly-discovered sedimentary metamorphic graphite deposit, and the study on the metamorphic characteristics and processes of the deposit and its carbon source is still a blank. The protolith of mining metamorphic rocks was reinstated through methods of petrology, petrochemistry and carbon isotope composition, and the stigma of degeneracy and ore genesis were also discussed in this paper. The results show that the metamorphism degree of the metamorphic rocks in this area was high amphibolite facies, and the silica was formed in the melt crystallization after the isothermal decompression degeneration. The original rock is a shallow sea-coastal phase carbon silica with characteristics of khondalite series and two kinds of information about Archean ancient continent and Proterozoic stable sediments. The source of metallogenic material is organic carbon, belonging to the organic origin. This research has certain guiding significance in the search of the same type of deposit in this area. |
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| Keywords: | Guokuishan graphite deposit metamorphic degree Khondalite series ore deposit genesis |
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