Rare earth elements in the clay fraction of coaliferous sediments of the Arkagalinskoe (Magadan district) and Dolinskoe (Sakhalin Island) coalfields |
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Authors: | V I Koporulin S M Lyapunov V V Seredin |
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Institution: | (1) Department of Resources and Geosciences, China University of Mining and Technology at Beijing, Beijing, 10008, People’s Republic China;(2) Knowledge Systems, Inc., 1 Sugar creek center Blvd. Ste.1100, Sugar Land, TX 77478, USA |
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Abstract: | The study of REE distribution in the clay fraction of sedimentary rocks from two coalfields made it possible to distinguish
several types of REE distribution, which correlate with their mineral composition. It is shown that the REE fractionation
was related to the mineral reconstruction of the primary clay fraction and some detrital minerals in the course of postsedimentary
transformations of rocks during diagenesis, early catagenesis, and beginning of late catagenesis. These transformations were
governed by several factors, such as the composition of sediments; hydrochemical features of accumulation environment; the
chemical composition, dynamics, and feeding sources of pore solutions; the porosity and permeability of sediments and rocks;
and the content of organic matter and its reaction ability. |
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Keywords: | |
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