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| 基金项目：辽宁省物测勘查项目“黑龙江省密山市良种场石墨矿详查”（WCY-2017-SC013） |
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| 摘要： |
| 黑龙江密山良种场石墨矿位于前寒武系和古生界褶皱基底之上的中生代断陷盆地（密山断陷盆地）内，沉降幅度较大，具海陆交互相沉积特征。地质勘查发现石墨矿带共9个矿段41条矿体，矿带呈北东东向展布，走向最大延长达1 389 m；矿床固定碳平均品位为8.21%。晶质石墨矿体赋存于新太古界麻山群余庆组上段，矿体严格受层位控制，呈单斜大致平行展布，以层状、似层状产出，局部出露地表，受侵入体影响，矿体产状有一定的变化。经选矿，可获得优质石墨矿物资源量299.37万t。根据良种场石墨矿床的地质特征，结合矿石选矿指标等要素进行综合分析，认为矿床成因类型为沉积变质型晶质鳞片状石墨矿床。该矿床的发现对在该区寻找同类型矿床有一定的借鉴意义。 |
| 关键词：石墨矿床 地质特征 成因 密山良种场 黑龙江 |
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| Abstract: |
| The Liangzhong Farm graphite deposit in Mishan City, Heilongjiang Province is located in the Mesozoic Mishan fault basin, which developed on the folded basement of the Precambrian and Paleozoic eras. The basin experienced significant subsidence and exhibits paralic sedimentary characteristics. Geological exploration has identified nine graphite ore belts comprising a total of 41 ore bodies. The ore belts trend in an NEE direction, with a maximum strike length of 1 389 m. The average fixed carbon grade of the deposit is 8.21%. The crystalline graphite ore bodies are hosted in the Upper Member of the Yuqing Formation of the Mashan Group in the Upper Archean. The ore bodies are strictly controlled by stratigraphic horizons and occur as a monocline with roughly parallel distribution, taking the form of layered and stratoid bodies, and are locally exposed at the surface. Affected by intrusive bodies, the attitudes of the ore bodies exhibit certain variations. After a series of mineral processing tests, high-quality graphite resources totaling 2.993 7 million tonnes can be obtained. Based on the geological characteristics of the Liangzhong Farm graphite deposit and a comprehensive analysis of mineral processing and smelting performance, it is concluded that the deposit is a sedimentary-metamorphic crystalline flake graphite deposit. The discovery of this deposit provides valuable reference for prospecting for similar deposits in that region. |
| Keywords:graphite deposit geological characteristic genesis Liangzhong Farm, Mishan City Heilongjiang |
| 黄万宽.黑龙江密山良种场石墨矿床地质特征及成因[J].地质学刊,2026,50(2):146-157 |
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