Scholarlink

<p>Potassium is a critical mineral resource for global agricultural security. Besides soluble potash salts, insoluble potassium resources hosted in black shale series represent an important alternative potash mineral resource. Extensively developed Cambrian potassium-rich black shales occur in the Wanshan District of Tongren, eastern Guizhou Province, southwestern China. They have K₂O contents ranging from 8% to 11% and prospective reserves exceeding 5&#xa0;billion tons. However, the potassium enrichment mechanism and its controlling factors in the potassium-bearing shales of this region remain unclear currently. Therefore, this study presents petrographic and elemental geochemical analyses of two representative sections in Wanshan, Tongren, Guizhou. The results indicate that potassium-rich felsic terrigenous detritus in the northwestern study area was transported to a passive continental margin setting, and deposited under restricted, suboxic to anoxic-dominated water conditions. The sedimentation-diagenesis stage underwent potassium metasomatism — a process that promoted the transformation of aluminous clay minerals into illite, eventually leading to the formation of potassium-bearing shales with K-feldspar and other minerals as the major potassium-bearing phases. This study provides a scientific basis for understanding potassium enrichment in the Cambrian black shales of eastern Guizhou and offers a valuable reference for exploring and developing potassium resources.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Potassium enrichment mechanism and controlling factors in Cambrian black shale from eastern Guizhou, China

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月23日

查看全文
  • Junwei Fu,
  • Lingling Tu,
  • Shuang Zhao,
  • Tianrui Jiang,
  • Wen Pan,
  • Wei Cheng,
  • Chunhua Shi,
  • Ruidong Yang,
  • Yonggang Li,
  • Junbo Gao

摘要

Potassium is a critical mineral resource for global agricultural security. Besides soluble potash salts, insoluble potassium resources hosted in black shale series represent an important alternative potash mineral resource. Extensively developed Cambrian potassium-rich black shales occur in the Wanshan District of Tongren, eastern Guizhou Province, southwestern China. They have K₂O contents ranging from 8% to 11% and prospective reserves exceeding 5 billion tons. However, the potassium enrichment mechanism and its controlling factors in the potassium-bearing shales of this region remain unclear currently. Therefore, this study presents petrographic and elemental geochemical analyses of two representative sections in Wanshan, Tongren, Guizhou. The results indicate that potassium-rich felsic terrigenous detritus in the northwestern study area was transported to a passive continental margin setting, and deposited under restricted, suboxic to anoxic-dominated water conditions. The sedimentation-diagenesis stage underwent potassium metasomatism — a process that promoted the transformation of aluminous clay minerals into illite, eventually leading to the formation of potassium-bearing shales with K-feldspar and other minerals as the major potassium-bearing phases. This study provides a scientific basis for understanding potassium enrichment in the Cambrian black shales of eastern Guizhou and offers a valuable reference for exploring and developing potassium resources.