Characteristics and origin of a new type of polyhalite potassium ore in the Lower Triassic Jialingjiang Formation, Puguang area, northeastern Sichuan Basin, SW China
| Autor: | Yongsheng Zhang, Yuan Peng, Kong Li, Jiaai Zhong, Mianping Zheng, Wenjun Shang, Baoling Gui, Enyuan Xing |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Anhydrite
Gypsum 010504 meteorology & atmospheric sciences Polyhalite New type of polyhalite potassium ore Geochemistry Storm event deposition engineering.material Structural basin 010502 geochemistry & geophysics Puguang area 01 natural sciences Diagenesis chemistry.chemical_compound Microfeatures and macrofeatures chemistry lcsh:Paleontology Lower Triassic Genetic model engineering Halite Sedimentary rock lcsh:QE701-760 Geology 0105 earth and related environmental sciences |
| Zdroj: | Journal of Palaeogeography, Vol 10, Iss 1, Pp 1-13 (2021) |
| ISSN: | 2524-4507 |
| Popis: | A new type of polyhalite potassium ore (NTPPO) was found in the Lower Triassic Jialingjiang Formation, NE Sichuan Basin, SW China. It is water soluble, therefore can be exploited using the water-solution method, and is of great potential of economic value and research significance. Based on cores, thin sections, energy spectrum and SEM analyses, its microfeatures, macrofeatures and origin are discussed, and a genetic model is established to provide a scientific basis for future evaluation, prediction and exploration of potassium ore in the Sichuan Basin. It is proposed that the NTPPO was caused by storm activities: (1) the storm broke the original sedimentary polyhalite–gypsum beds, whose fragments were transported into the salt basin with high content of K+ and Mg2+; (2) in the basin, the polyhalite continued to be formed from gypsum by metasomatism with K- and Mg-rich brine; (3) during diagenesis, under high temperature and high pressure, K–Mg-rich brine from halite continued to replace anhydrite (or gypsum) to form polyhalite. |
| Databáze: | OpenAIRE |
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