Isotope geochemistry of carbonate sediments from Lake Kivu (East-Central Africa).

Botz, R., Stoffers, P., Faber, E. and Tietze, K. (1988) Isotope geochemistry of carbonate sediments from Lake Kivu (East-Central Africa). Chemical Geology, 69 (3-4). pp. 299-308. DOI 10.1016/0009-2541(88)90041-1.

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Abstract

Isotopic investigations of carbonates from Lake Kivu show that most of the carbonate in the main basin is precipitated in isotopic equilibrium with the lake water bicarbonate (near isotopic equilibrium with the atmosphere). However, aragonite precipitated from the surface water of the separate Bukavu basin was periodically enriched in 13C ([delta]13C up to + 13.6[per mille sign]) due to a preferential removal of 12C-enriched sedimentary organic matter. This occurred during times of low water-level stands when the Bukavu basin was isolated from the main lake and its waters were "chemically" stratified.

Document Type: Article
Research affiliation: Kiel University
Refereed: No
DOI etc.: 10.1016/0009-2541(88)90041-1
ISSN: 0009-2541
Date Deposited: 02 Feb 2012 09:30
Last Modified: 23 Sep 2019 22:33
URI: http://oceanrep.geomar.de/id/eprint/16396

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