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Origin of the Dolomitic Ooids Formed in the Pliocene Shizigou Formation in the Qaidam Basin, Northern Tibet Plateau and Implications for Climate Change

文献类型：期刊论文

作者Hao, Lewei1,2; Jia, Jiantuan3,4; Tao, Huifei1,2; Chen, Jinniu3,4; Ma, Xiaofeng1,2; Li, Shutong1; Qiu, Junli1
刊名MINERALS
出版日期2022-12-01
卷号12期号:12页码:16
关键词ooids salt lake sulfate-reducing bacteria Pleistocene Qaidam Basin
DOI10.3390/min12121586
英文摘要The concentric layers of ooids from the modern environment are mostly aragonite and those from the ancient are mostly calcite and Mg-calcite. Dolomitic ooids are rare and are usually formed via the replacement of aragonite or calcite. Here, dolomitic ooids were found in the Pliocene Shizigou Formation in the Qaidam Basin, Northern Tibet Plateau. This paper focuses on whether the dolomitic ooids is a primary precipitate. Optical microscope and scanning electron microscope observation, combined with X-ray diffraction and cathodoluminescence analyses, indicate that the primary mineral of the ooid cortices is poorly ordered dolomite. Extracellular polymeric substances and pyrite were found in the ooids, indicating that the microbe participation was involved in the formation of the ooids. Firstly, the ooids grow on the offshore lake floor. Due to the involvement of sulfate-reducing bacteria and dissolved silica, the nanominerals were precipitated on extracellular polymeric substances. Then, the ooids were transported to strong hydrodynamic surf zones, where the random nanominerals were abraded to form flattened plates as a new polished layer. In addition, a comparison between the carbon and oxygen isotopic compositions and minerals of ooids from different periods indicate that the Pliocene lakes had a lower salinity and were more humid than Pleistocene lakes. Therefore, ooids may be an effective proxy for reflecting the climatic change and uplift history of the Tibet Plateau.
WOS关键词DISORDERED DOLOMITE ; MARINE OOIDS ; CARBONATE ; HOLOCENE ; UPLIFT ; PRECIPITATION ; MECHANISM ; TEMPERATURE ; QUATERNARY ; EVOLUTION
资助项目Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin ; [2019QZKK0704]
WOS研究方向Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000903499800001
出版者MDPI
资助机构Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin ; Effective Reservoirs of Deep Brine in Tertiary Anticline Structural Area in Qaidam Basin
源URL[http://ir.iggcas.ac.cn/handle/132A11/106957]  
专题地质与地球物理研究所_兰州油气中心
通讯作者Jia, Jiantuan; Tao, Huifei
作者单位1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Peoples R China
2.Natl Engn Res Ctr Offshore Oil & Gas Explorat, Beijing 100028, Peoples R China
3.Qaidam Comprehens Geol & Mineral Explorat Inst Qin, Golmud 816099, Peoples R China
4.Key Lab Salt Lake Resource Explorat & Res Qaidam B, Golmud 816099, Peoples R China
推荐引用方式
GB/T 7714		 Hao, Lewei,Jia, Jiantuan,Tao, Huifei,et al. Origin of the Dolomitic Ooids Formed in the Pliocene Shizigou Formation in the Qaidam Basin, Northern Tibet Plateau and Implications for Climate Change[J]. MINERALS,2022,12(12):16.
APA Hao, Lewei.,Jia, Jiantuan.,Tao, Huifei.,Chen, Jinniu.,Ma, Xiaofeng.,...&Qiu, Junli.(2022).Origin of the Dolomitic Ooids Formed in the Pliocene Shizigou Formation in the Qaidam Basin, Northern Tibet Plateau and Implications for Climate Change.MINERALS,12(12),16.
MLA Hao, Lewei,et al."Origin of the Dolomitic Ooids Formed in the Pliocene Shizigou Formation in the Qaidam Basin, Northern Tibet Plateau and Implications for Climate Change".MINERALS 12.12(2022):16.

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来源：地质与地球物理研究所

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