The Formation of Authigenic Carbonates at a Methane Seep Site in the Northern Part of the Laptev Sea; Minerals; Vol. 10, iss. 11

The Formation of Authigenic Carbonates at a Methane Seep Site in the Northern Part of the Laptev Sea; Minerals; Vol. 10, iss. 11

Bibliographic Details
Parent link:Minerals
Vol. 10, iss. 11.— 2020.— [948, 14 p.]
Corporate Author: Национальный исследовательский Томский политехнический университет Инженерная школа природных ресурсов Отделение геологии
Other Authors: Ruban A. S. Aleksey Sergeevich, Rudmin M. A. Maksim Andreevich, Dudarev O. V. Oleg Viktorovich, Mazurov A. K. Aleksey Karpovich
Summary:Title screen
Authigenic carbonates from cold seeps are unique archives for studying environmental conditions, including biogeochemical processes associated with methane-rich fluid migration through the sediment column. The aim of this research was to study major oxide, mineralogical, and stable isotopic compositions of cold-seep authigenic carbonates collected in the northern part of the Laptev Sea. These carbonates are represented by Mg-calcite with an Mg content of 2% to 8%. The ?13C values range from ?27.5‰ to ?28.2‰ Vienna Peedee belemnite (VPDB) and indicate that carbonates formed due to anaerobic oxidation of methane, most likely thermogenic in origin. The authigenic pyrite in Mg-calcite is evidence of sulfate reduction during carbonate precipitation. The ?18O values of carbonates vary from 3.5‰ to 3.8‰ VPDB. The calculated ?18Ofluid values show that pore water temperature for precipitated Mg-calcite was comparable to bottom seawater temperature. The presence of authigenic carbonate in the upper horizons of sediments suggests that the sulfate–methane transition zone is shallowly below the sediment–water interface.
Language:English
Published: 2020
Subjects:
электронный ресурс
труды учёных ТПУ
authigenic carbonate
cold seep
anaerobic methane oxidation
oxygen and carbon isotopes
fluid source
Laptev Sea
окисление
изотопы кислорода
море Лаптевых
Online Access:http://earchive.tpu.ru/handle/11683/64781
https://doi.org/10.3390/min10110948
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662934

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