A Sequence Stratigraphic Interpretation on Late Permian Carbonate Coal Measures in the Heshan Coal Field, Southern China

SHAO Long-yi; CHEN Jia-liang; LI Rui-jun; ZHANG Peng-fei

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Article Navigation > Acta Sedimentologica Sinica > 2003 > 21(1): 168-174

SHAO Long-yi, CHEN Jia-liang, LI Rui-jun, ZHANG Peng-fei. A Sequence Stratigraphic Interpretation on Late Permian Carbonate Coal Measures in the Heshan Coal Field, Southern China[J]. Acta Sedimentologica Sinica, 2003, 21(1): 168-174.

Citation:

A Sequence Stratigraphic Interpretation on Late Permian Carbonate Coal Measures in the Heshan Coal Field, Southern China

1.
Department of Resources and Earth Sciences, China University of Mining and Technology, D11 Xueyuan Road, Beijing 100083;
2.
Guangxi Safe Production Administration, Nanning 530022

Received Date: 2002-12-26
Rev Recd Date: 2003-01-10
Publish Date: 2003-03-10

Abstract

The Late Permian Heshan Formation in the Heshan coal field is a typical carbonate coal measures formed in a shallow water carbonate platform setting. Up to seven coal seams have been preserved with numbers 2, 3A, 3B, 3C, 4A, 4B and 5, in descending order. Four third-order unconformity-bounded sequences have been identified. Sequence Ⅰ is from the bottom of the Heshan Fm to the base of the cherts beneath coal Seam 4B. Sequence Ⅱ is from the cherts beneath Seam 4B to the base of Seam 4A; Sequence Ⅲ is from base of Seam 4A to the base of the bauxitic mudstone beneath Seam 2; Sequence Ⅳ is from the base of the bauxitic mudstone beneath Seam 2 to the top of the Heshan Formation. Sequences Ⅰ, Ⅱ, and Ⅳ are strongly controlled by regional differential subsidence. Sequence Ⅲ shows cyclicity of the coal and carbonate rocks, with extensive distribution in the central Guangxi area, reflecting strong control by sea level changes. Within the Sequence Ⅲ, four fourth-order sequences are recognised, each consisting of a basal transgressive coal seam and overlying highstand tidal flat and open platform limestones. In the Heshan coalfield, fourth-order sequences and coals within the Sequence Ⅲ thin first and then thicken upwards, with the thinnest being the fourth-order sequence with coal Seam 3B. As a result, the thickest coal in the carbonate platform setting is formed at the transgressive surface and the thinnest coal is formed at the bottom of the maximum flooding zone.
- sequence stratigraphy,
- carbonate coal measures,
- Heshan coal field,
- Late Permian

References

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沈阳化工大学材料科学与工程学院沈阳 110142

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A Sequence Stratigraphic Interpretation on Late Permian Carbonate Coal Measures in the Heshan Coal Field, Southern China

1. Department of Resources and Earth Sciences, China University of Mining and Technology, D11 Xueyuan Road, Beijing 100083;

2. Guangxi Safe Production Administration, Nanning 530022

Received Date: 2002-12-26

Rev Recd Date: 2003-01-10

Publish Date: 2003-03-10

Key words:

Abstract: The Late Permian Heshan Formation in the Heshan coal field is a typical carbonate coal measures formed in a shallow water carbonate platform setting. Up to seven coal seams have been preserved with numbers 2, 3A, 3B, 3C, 4A, 4B and 5, in descending order. Four third-order unconformity-bounded sequences have been identified. Sequence Ⅰ is from the bottom of the Heshan Fm to the base of the cherts beneath coal Seam 4B. Sequence Ⅱ is from the cherts beneath Seam 4B to the base of Seam 4A; Sequence Ⅲ is from base of Seam 4A to the base of the bauxitic mudstone beneath Seam 2; Sequence Ⅳ is from the base of the bauxitic mudstone beneath Seam 2 to the top of the Heshan Formation. Sequences Ⅰ, Ⅱ, and Ⅳ are strongly controlled by regional differential subsidence. Sequence Ⅲ shows cyclicity of the coal and carbonate rocks, with extensive distribution in the central Guangxi area, reflecting strong control by sea level changes. Within the Sequence Ⅲ, four fourth-order sequences are recognised, each consisting of a basal transgressive coal seam and overlying highstand tidal flat and open platform limestones. In the Heshan coalfield, fourth-order sequences and coals within the Sequence Ⅲ thin first and then thicken upwards, with the thinnest being the fourth-order sequence with coal Seam 3B. As a result, the thickest coal in the carbonate platform setting is formed at the transgressive surface and the thinnest coal is formed at the bottom of the maximum flooding zone.

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A Sequence Stratigraphic Interpretation on Late Permian Carbonate Coal Measures in the Heshan Coal Field, Southern China

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