EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Organic geochemical characteristics of coal deposits in Mae Than coal mine, Lampang Province, Thailand

Patthapong Chaiseanwang1 and Piyaphong Chenrai2
Patthapong Chaiseanwang and Piyaphong Chenrai
  • 1Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand (
  • 2M.Sc. in Petroleum Geoscience program, Chulalongkorn University, Bangkok 10330, Thailand (

Fifteen samples were collected from coal mines Mae Than basins located in Lampang Province, Northern Thailand to investigate organic geochemical characterization which can provide organic matter input, thermal maturity and depositional environment. The total organic carbon (TOC) content of the coal samples ranges from 30.12 to 73.71 wt. %, while shales and mudstones value between 5.98 – 24.87 wt. %. The extractable organic matter (EOM) content of all samples, which is yielded from bitumen extraction, values in the range of 1,256 and 16,421 ppm indicating good to excellent hydrocarbon generation potential. The organic geochemical data were studied by using Gas-chromatography Mass-spectrometry (GC-MS) providincg biomarker and non-biomarker data. The thermal maturity of studied samples is represented as immature stage due to ratio of Ts/(Ts+Tm) and homohopane isomerization. The distribution of normal alkanes is predominantly long-chain normal alkanes with odd-numbered carbon. The high Carbon Preference Index (CPI) value of samples indicates terrestrial organic matter input. The depositional environment of the study area can be interpreted that the coal formation is occurred within an oxidizing condition with the majority of higher plant input, whereas shale and mudstone is slightly more anoxic-aquatic environment.

How to cite: Chaiseanwang, P. and Chenrai, P.: Organic geochemical characteristics of coal deposits in Mae Than coal mine, Lampang Province, Thailand, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12894,, 2020

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