DBPapers
DOI: 10.5593/sgem2017/11/S01.084

THE ROLE OF ORGANIC MATTER IN AUTHIGENIC MINERALS FORMATION FROM LAKE SKALISTOE (OLKHON REGION)

V. Strakhovenko, E. Ovdina, E. Solotchina
Saturday 9 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-98-8 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 11, 665-670 pp, DOI: 10.5593/sgem2017/11/S01.084

ABSTRACT

The paper discusses current mineralization in the small closed lake Skalistoe, located in the territory of Olkhon region (western Baikal area), characterized by the semiarid climate. To analyze the mineral phases formed on unattached algal-bacterial formations (the atmosphere-water interface), submerged algae and macrophytes (water-bottom sediment), and bottom sediments, we used the methods of X-ray diffraction, infrared spectroscopy, and electron microscopy. It was found out that the minerals deposited during the life of algae formed a thin film on the primary frame of algae, consisting of fine-grained precipitates of Mg-sulfate and Mg-hydroxides with grown thin magnesite plates and large xenomorphic excretions composed by CaCO3 and CaCO3 • H2O. On submerged algae and macrophytes, the above mineral excretions were added by the mortmass of diatoms, composed of amorphous silicon dioxide. Predominantly excess-Ca dolomite, high-magnesium calcite, aragonite, monohydrocalcite and fragments of terrigenous quartz added with quartz, formed by amorphous silica of diatoms and pyrite, accumulated in the bottom sediments because of chemogenic precipitation.

Keywords: Baikal region, biogeochemistry, carbonate mineralogy, modern bottom sediments, shallow lake.

Home | Contact | Site Map | Site statistics | Visitors : 0 / 353063

Follow site activity en  Follow site activity GEOLOGY  Follow site activity Papers SGEM2017   ?

CrossRef Member    Indexed in ISI Web Of Knowledge   Indexed in ISI Web Of Knowledge
   

© Copyright 2001 International Multidisciplinary Scientific GeoConference & EXPO SGEM. All Rights Reserved.

Creative Commons License