Role of the bacterial communities in the old phosphorites accumulation

Elena A. Zhegallo; Alexei Yu. Rozanov; Galina T. Ushatinskaya

doi:10.1117/12.319835

6 July 1998 Role of the bacterial communities in the old phosphorites accumulation

Elena A. Zhegallo, Alexei Yu. Rozanov, Galina T. Ushatinskaya

Proceedings Volume 3441, Instruments, Methods, and Missions for Astrobiology; (1998) https://doi.org/10.1117/12.319835
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

The Vend-Early Cambrian phosphorite stockpiles compose about 20% ofthe world's phosphorites. The most extensive ancient phosphorite deposits are located in Central Asia, in South China, Northern Mongolia (Khubsugul) and South Kazakhstan (Karatau). According to palaeomagnetic data, at the beginning of the Cambrian these regions were restricted to low latitudes and, consequently, to the equatorial climatic belt. The time of accumulation of the most of above mentioned deposits falls within the Tommotian, which is the earliest stage of the Early Cambrian. These deposits are dated using the fossils incorporated in the phosphorites. We studied the structure of the Khubsugul phosphorites (I). Khubsugul phosphorites are represented by granular or structureless aphanite rocks refered to microgramed type. Their genesis is often related to chemical phosphorus precipitation from level bottom waters in the vicinity ofupwelling zones (2).

Citation Download Citation

Elena A. Zhegallo, Alexei Yu. Rozanov, and Galina T. Ushatinskaya "Role of the bacterial communities in the old phosphorites accumulation", Proc. SPIE 3441, Instruments, Methods, and Missions for Astrobiology, (6 July 1998); https://doi.org/10.1117/12.319835

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