The sedimentological characteristics of microbialites of the Cambrian in the vicinity of Beijins, China

With oil and gas exploration transferring to deeper and more ancient marine strata, more re-searches have been conducted about the Meso-Neoproterozoic and Cambrian microbial carbonate rocks bypetroleum geologists. The Cambrian deposits experienced the first transgression of the Paleozoic, with shall...

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Published in古地理学报：英文版 Vol. 6; no. 2; pp. 117 - 131
Main Author Yin- Ye Wu Tian-Shu Zhang Jia-Lei Lü Yan Liu
Format Journal Article
LanguageEnglish
Published 2017
Subjects
and
Beijing
Bioherm
Cambrian
gas
Maline
Microbiatite
Oil
reservoir
sedimentaryenvironment
Stromatolite
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Summary:With oil and gas exploration transferring to deeper and more ancient marine strata, more re-searches have been conducted about the Meso-Neoproterozoic and Cambrian microbial carbonate rocks bypetroleum geologists. The Cambrian deposits experienced the first transgression of the Paleozoic, with shallowmarine facies depositing in most areas, which are favorable for different kinds of biological reproduction. TheLower Cambrian in Beijing area is lithotogicaUy dominated by purple red shales interbedded with limestones,the Middle Cambrian is mainly composed of thick oolitic limestones, and the Upper Cambrian consists of thinlimestones and flat-pebble conglomerates. Two beds of microbial carbonate rocks were discovered in theCambrian outcrops in the vicinity of Beijing. One is from the Zhangxia Formation of Middle Cambrian, and theother is from the Gushan Formation of Upper Cambrian. The microbiatites are characterized by combination ofmultiple stromatotites forming different bioherms. The bioherms are mostly in oval shape and with differentsizes, which are 3-4 m long, and 1-3 m high. The surrounding strata beneath the bioherms are ooliticlimestones.
Bibliography:10-1041/P
ISSN:2095-3836