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Coal in a carbonate sequence stratigraphic framework; the Upper Permian Heshan Formation in central Guangxi, southern China

Shao Longyi, Zhang Pengfei, R. A. Gayer, Chen Jialiang and Dai Shifeng
Coal in a carbonate sequence stratigraphic framework; the Upper Permian Heshan Formation in central Guangxi, southern China
Journal of the Geological Society of London (March 2003) 160 (2): 285-298

Abstract

Microfacies and sedimentological analyses of the Upper Permian coal-bearing Heshan Formation in the Heshan coalfield of central Guangxi suggest that these coal measures formed in a marine carbonate platform setting. Low-volatile bituminous coals with very high organic sulphur overlie either palaeosols or locally developed cherts. The petrography and geochemistry of the coals suggest formation in low-lying mires, in which marine influence increased upwards. In the Heshan and overlying Dalong Formations, four third-order sequences are described based on the recognition of four sequence boundaries. Higher-order sequences within each of these third-order sequences are also documented and, within Sequence III, coal seams are developed above higher-order transgressive surfaces, representing the deposits formed during the lag time between initial flooding of the platform and the onset of carbonate production. In the Heshan Formation, the coals with greatest thickness occur immediately above third-order transgressive surfaces. It is argued that, in some coal-bearing siliciclastic-free marine carbonate-platform settings, accommodation creation rates and peat accumulation rates are balanced, hence greater coal accumulation can be achieved at the transgressive surface rather than at the maximum flooding surface.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 160
Serial Issue: 2
Title: Coal in a carbonate sequence stratigraphic framework; the Upper Permian Heshan Formation in central Guangxi, southern China
Affiliation: China University of Mining and Technology, Department of Resource and Earth Sciences, Beijing, China
Pages: 285-298
Published: 200303
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 63
Accession Number: 2003-032455
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. col., 2 tables, sketch maps
N21°30'00" - N26°19'60", E104°30'00" - E112°00'00"
Secondary Affiliation: Cardiff University, GBR, United KingdomGuangxi Coal Mine Safe Production Administration, CHN, China
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200311
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