| 江昱良,龚彬,李鸿巍,邓良武,舒姚.川东北万源市大坪地区钒矿成矿地质特征及成因分析[J].矿产勘查,2025,16(S1):90-98 |
| 川东北万源市大坪地区钒矿成矿地质特征及成因分析 |
| Metallogenic geological characteristics and genesis analysis of vanadium deposit in Daping area，Wanyuan City，Northeast Sichuan |
| 投稿时间：2024-09-18 |
| DOI：10.20008/j.kckc.2025S1010 |
| 中文关键词: 钒矿 地质特征 成因分析 大巴山 万源市 |
| 英文关键词: vanadium deposit metallogenic geological characteristics genesis analysis Daba mountain Wanyuan City |
| 基金项目:本文受四川省地质矿产勘查开发局地质专项项目(SCDZ-DZKC202409)资助。 |
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| 中文摘要: |
| 研究区位于川东北万源市西北部，构造上位于扬子准地台与秦岭地槽的分界，受大巴山造山运动影响，区内及周边断裂构造发育，顺层滑脱逆冲推覆作用对研究区钒矿出露具有良好的建设作用。钒矿层位于下寒武统鲁家坪组，含矿层两层，岩性为炭质板岩。物相分析钒主要赋存于钒云母中。地球化学特征显示，研究区元素中 P、Cu、Zn、Cr、V、Mo、U等元素异常富集(研究区值 /地壳丰度＞ 7)余者皆略高或低于地壳元素丰度(研究区值 /地壳丰度＜ 2. 5)。本文通过各元素相关性计算，研究区钒矿，藏沉积于近岸地区(＜ 100 km)，深度较深( .250 m)，为热水且缺氧的沉积环境，推测为断层形成的海底凹陷洼地。钒元素的富集则主要与海底热水喷流沉积及生物沉积相关联。总体而言，大断裂为钒矿沉积提供了良好的沉积场所及部分物质通道，寒武系生命大爆发亦提供较好物质基础，经过埋藏、成岩及后期改造后，因造山运动逆冲推覆作用，使得钒矿呈现于地表形成可开发利用的矿藏。 |
| 英文摘要: |
| The study area is located in the northwest of Wanyuan City，northeastern Sichuan Province. It is structurally situated at the boundary between the Yangtze Platform and the Qinling Geosyncline. Affected by theDaba Mountain orogeny，the area and its surroundings are characterized by well-developed fault structures. The along-strata detachment thrust nappe movement has played a favorable role in the exposure of vanadium deposits inthe study area. The vanadium deposit layer is located in the Lujiaping Formation of the Lower Cambrian Forma. tion，with two layers of ore-bearing layers，and the lithology is carbonaceous slate. Phase analysis:Vanadium mainly exists in vanadium mica. The geochemical characteristics showed that the elements in the study area wereabnormally enriched(study area/crustal abundance >7)，and the rest were slightly higher or lower than the crustal element abundance(study area value/crustal abundance< 2. 5). According to the correlation calculation of each element，the vanadium deposits in the study area are deposited in the near-shore area(<100 km)and at a deep depth(. 250 m)， which is a sedimentary environment of hot water and hypoxia，and is presumed to be a submarine depression formed by faults. The enrichment of vanadium is mainly related to seafloor hot water jetsedimentation and biological sedimentation. In general，the deep fault provides a good sedimentary site and part of the material source for vanadium deposits，and the Cambrian explosion of life also provides a good material basis. |
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