Concerning the Original Viewpoint of Biogeologic Accumulation of the Old Bedded Phosphorites in the Khubsugul and Zavkhan Basins of Mongolia

Concerning the Original Viewpoint of Biogeologic Accumulation of the Old Bedded Phosphorites in the Khubsugul and Zavkhan Basins of Mongolia
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关于蒙古库苏古尔盆地和扎夫汗盆地老层状磷矿生物地质堆积的原始观点

DOI：
10.4236/ojg.2015.59059
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发表时间：
2015
期刊：
Open Journal of geology
影响因子：
--
通讯作者：
G. Altanshagai
G. Altanshagai
中科院分区：
--
文献类型：
--
作者：
D. Dorjnamjaa;G. Altanshagai

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本文论述了地质堆积 及其特点，含磷矿石的岩性组合 这些盆地的形成和古老生物群的演化。旧床 磷块岩被认为与特定的地质事件有关 发生在新元古代冰期，随后是快速的 冰消作用、埃迪卡拉纪生物辐射和“大”冰后期 海侵初期含磷块岩。蒙古 磷酸盐盆地提供了这一现象的证据。Khubsugul盆地位于 在蒙古的北方。新元古代-寒武纪含磷块岩 Khubsugul群又分为Ongolik、Kheseen和Kheseen 3个地层 erkhelnuur富含有机化石（一组蓝藻垫， archaeocyaths，trilobites），按升序排列。扎夫汗盆地位于 蒙古西部。埃迪卡拉-下寒武统沉积物可分为 五个地层：Maikhanuul（杂岩）、Tsagaanolom（含磷块岩 碳酸盐）、巴扬戈尔、萨拉尼戈尔和海尔汗。所有的编队都包含 古生物化石（藻类，海绵，蓝藻垫，遗迹群落， 软体动物、古囊菌等）。层状磷块岩是 细菌古生物学的综合研究。它显示在示例中， 蒙古呼布苏古尔和扎夫汗海陆架磷酸盐盆地。阐述了 实际材料清楚地表明，异质生物活性， 合适的地质（海侵体系域）和古地理 （冰川作用、温暖气候等）条件发挥了重要作用， 生物成因层状磷块岩的形成和聚集。
This paper concerns deals with biogeologic accumulation and their peculiarities, lithological unites of the phosphorite-bearing formations of these basins and an evolution of the old biota. Old bedded phosphorites are believed to be connected with specific biogeological events happening in the Neoproterozoic glaciation, which was followed by rapid deglaciation, Ediacaran bioradiation and the “great” postglacial transgression bearing phosphorites at its initial phase. The Mongolian phosphate basins give evidence of this phenomenon. Khubsugul basin is located in the northern Mongolia. The Neoproterozoic-Cambrian phosphorite-bearing khubsugul group is subdivided into 3 formations as ongolik, kheseen and erkhelnuur which are rich in organic fossils (a group of cyanobacterial mats, archaeocyaths, trilobites) in the ascending order. The Zavkhan basin lies in the western Mongolia. The Ediacaran-lower Cambrian sediments are divided into five formations: Maikhanuul (diamictites), Tsagaanolom (phosphorite-bearing carbonate), Bayangol, Salaanygol and Khairkhan. All the formations contain the paleontological fossils (algae, sponges, cyanobacterial mats, ichnocoenosis, soft-bodied fauna, archaeocyaths, etc.). Bedded phosphorites are the object for comprehensive research of bacterial paleontology. It is shown at example of the Mongolian Khubsugul and Zavkhan sea shelf phosphate basins. The expounded actual material clearly shows that the heterogeneous biologic activity, suitable geologic (transgressive systems tracts) and paleogeographic (glaciations, warm climate, etc.) conditions played an important role in the formation and accumulation of the biogenic bedded phosphorites.