| 中国陆块海相盆地成钾条件与预测研究进展综述 |
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| 关键词:small blocks marine basin evaporite potash-forming potential target prediction |
| 基金项目:国家重点基础研究发展计划(973计划)(编号: 2011CB403007) |
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| 摘要: |
| Advance in the Study of Forming Condition and Prediction of Potash Deposits of Marine Basins in China’s Small Blocks: Review |
| Potash exploration in ancient marine basins has not achieved breakthrough, and potential for potash formation in ancient marine basins and marine-land transitional basins in China has long been a topic of controversy. It is critical to answer the question that whether small blocks of China have potential for formation of potash deposits or even large-scale potash deposits. In this study, with the plate tectonic activities as the main line, we conducted systematic summaries for drift history of main small blocks of China, structures of basin-formation, paleoclimate, paleogeography and sedimentary characteristics of evaporites within marine/ marine-land transitional basins, analyzed related potash-forming conditions and mineralization mechanism on the basis of potash-forming theory of coupled factors of tectonics, materials source and climate, summarized potash-forming features of global marine basins, established a corresponding evaluating index system, evaluated potash-forming potentials and predicted strategic targets by means of reconstruction of regional structures, paleogeography, material source and paleoclimate. The mineralization model suggests that the Cretaceous Lanping–Simao basin, Lower–Middle Triassic Sichuan basin in upper Yangzt block, Middle Ordovician northern Shaanxi basin in North China block and Paleogene Kuqa basin in Tarim block have relative good potential for potash formation. Combining with index system we defines the key targets in strategic target areas of the southern Lanping–Simao basin, mid-eastern Sichuan basin and Kuqa basin where drilling verifications can be conducted. All the above research results provide scientific basis for the future theoretical study and exploration of potash deposits in China’s marine basins. |
| LIU Cheng-lin,WU Chi-hua,WANG Li-cheng,FANG Xiao-min,ZHAO Yan-jun,YAN Mao-du,ZHANG Yong-sheng,CAO Yang-tong,ZHANG Hua,LÜ Feng-lin.2016.Advance in the Study of Forming Condition and Prediction of Potash Deposits of Marine Basins in China’s Small Blocks: Review[J].Acta Geoscientica Sinica,37(5):581-606. |
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