| 祁晓鹏,周伟,徐磊,张嘉升,杨杰.扬子板块北缘镇巴地区下二叠统梁山组富锂黏土岩地质特征及成因初探[J].矿产勘查,2025,(1):129-141 |
| 扬子板块北缘镇巴地区下二叠统梁山组富锂黏土岩地质特征及成因初探 |
| Geological characteristic and genesis of lithium-enriched claystone in Lower Permian Liangshan Formation, Zhenba area, northern margin of Yangtze Plate |
| 投稿时间：2024-08-19 |
| DOI：10.20008/j.kckc.202501012 |
| 中文关键词: 赋存状态 沉积物源 富锂黏土岩 梁山组 扬子板块北缘中图分类号:P595 P611文献标志码:A文章编号:1674-7801(2025)01-0129-13 |
| 英文关键词: occurrence state sedimentary provenance lithium-enriched claystone Liangshan Formation northern margin of Yangtze Plate |
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| 中文摘要: |
| 本文报道了扬子板块北缘镇巴地区下二叠统梁山组黏土岩系锂的超常富集特征，黏土岩 Li2O最高含量 |
| 英文摘要: |
| This paper reports the supernormal enrichment characteristics of lithium in the claystone series ofthe Lower Permian Liangshan Formation in Zhenba area, northern margin of the Yangtze Plate. The highest contentof Li2O in the claystone is 0.85%, which has potential development significance. In order to find out the geologicalcharacteristics of this set of lithium-rich claystone and the occurrence state of lithium, This paper identifies thesedimentary sequence of Liangshan Formation claystone and the clay minerals composition of lithium-enrichedclaystone, investigates the source of sedimentary parent rock and sedimentary material, demonstrates the occurrencestate of lithium, throughdetailed field geological survey, X-ray diffraction (XRD) analysis, scanning electronmicroscopy-energy dispersive spectrometry (SEM-EDS) and geochemical analysis. The study shows that the Liang.shan claystone in Zhenba area develops in the parallel unconformity interface of Liangshan Formation (P1l) / Luo. reping Formation (S1l), which is a set of iron-aluminum claystone and carbonaceous claystone combination.Lithium-enriched claystone is produced in the upper layer of this set of claystone series. The Liangshan Formationlithium-enriched claystone is mainly composed of quartz, illite and chlorite, with a small amount of feldspar andanatase.The characteristics of major elements (SiO2、Al2O3、TFe2O3、TiO2) show that the claystone belongs to alumi.num claystone. The geochemical characteristics of rocks indicate that the claystone of the Liangshan Formation arederived from intermediate-basic magmatic rocks. Combined with regional geological data and comparative analysis,this paper considers that the sediment source of the Liangshan Formation claystone is mainly the basement of theYangtze Plate-Hannan Massif. It indicates that lithium mainly occurs in cookeite. This research results can providescientific reference for the study of lithium-enriched claystone, and can also guide the exploration of clay-typelithium deposits in the northern margin of Yangtze plate in this area. |
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