中国地球化学学报(英文版)
中國地毬化學學報(英文版)
중국지구화학학보(영문판)
CHINESE JOURNAL OF GEOCHEMISTRY
2002年
4期
348-361
,共14页
南君亚%刘丛强%周德全%王筑明
南君亞%劉叢彊%週德全%王築明
남군아%류총강%주덕전%왕축명
Permian-Triassic%sedimentary environment%REE%geochemistry%Guizhou Province
This paper deals with the REE geochemical characteristics of Permian-Triassic marine carbonate rocks in Guizhou Province. It is found that there are two broad categories of stratigraphic units in the region studied in accordance with their ∑ REE contents and REE distribution patterns: one is characterized by LREE enrichment and slight Ce depletion, with the REE distribution patterns similar to those of North American shales, and the other features relative HREE enrichment and relatively remarkable Ce depletion, with the REE distribution patterns close to those of pelagic sediments. In terms of their different ∑ REE contents, five types of stratigraphic units can be distinguished. Incorporation of detrital minerals, REE complexing capability, oxidation-reduction conditions of the media are the main factors affecting the REE composition and REE distribution patterns of marine carbonate rocks in the region studied. In the light of REE geochemical characteristics of carbonate rocks, coupled with sedimentary facies analysis, this paper discusses the characteristics of the Permian-Triassic marine sedimentary environment in Guizhou Province and its evolutional rules.