Coal quality, mineralogy, petrography, and geochemistry of the high-strontium Bozburun lignite (Malatya, eastern Türkiye)

Year 2024, Volume: 173 Issue: 173, 19 - 54, 26.04.2024

Rıza Görkem Oskay Ali İhsan Karayiğit

https://doi.org/10.19111/bulletinofmre.1198192

Abstract

The Bozburun coalfield hosts a late Miocene 1.1 m thick coal seam. This study aims to determine coal quality, mineralogy, petrography and geochemistry, and controlling factors of elemental enrichments. The coals are generally black and greyish black in colour, and the low part of the seam commonly includes fossil shell remains. The ash yield displays a decreasing trend towards the upper part of the seam; in turn, gross calorific and total C values increase upwards. The total S content being generally higher than 5% (on dry basis), displays an increasing trend towards the upper part. In the entire seam, huminite is the most common maceral group, while inertinite and liptinite display variable proportions. The identified minerals by XRD are mainly quartz, clay minerals, calcite, pyrite, and aragonite (in fossil shell remains-bearing samples), whereas feldspars and marcasite determined in a few samples. Furthermore, in the coal samples, celestine and barite were identified by SEM-EDX. This study indicates that precipitation of celestine and Sr-bearing barite grains during diagenetic stage and Sr-uptake by mollusc within the palaeomire caused Sr enrichment in the entire seam. Overall, the water influx and redox conditions controlled the mineralogical and the elemental compositions of the coal seam.

Keywords

Malatya Basin, Miocene, Maceral, Celestine, Barite.

Ethical Statement

This study is not supported by any external funds. Preliminary results of this study have been presented at the 74th Geological Congress of Turkey (Ankara/ Türkiye). The authors would like to thank Bahadır Madencilik Co. for sampling permission; to Mr. Vakkas KARAOĞLU and Mr. Vedat Gök (Bahadır Madencilik Co.) for their assistance during the field work; Dr. Emine CİCİOĞLU -Sütçü, Mr. Yılmaz BULUT, Mr. Bülent BAŞARA, Mr. Arif TALAY, and Mr. Ufuk KİBAR (MTA) for their help at different stages of the analytical procedures; and Prof. Dr. James HOWER (University of Kentucky, Center for Applied Energy Research) for his comments and suggestions during the manuscript preparation.

Supporting Institution

This study is not supported by any external funds. Preliminary results of this study have been presented at the 74th Geological Congress of Turkey (Ankara/ Türkiye). The authors would like to thank Bahadır Madencilik Co. for sampling permission; to Mr. Vakkas KARAOĞLU and Mr. Vedat Gök (Bahadır Madencilik Co.) for their assistance during the field work; Dr. Emine CİCİOĞLU -Sütçü, Mr. Yılmaz BULUT, Mr. Bülent BAŞARA, Mr. Arif TALAY, and Mr. Ufuk KİBAR (MTA) for their help at different stages of t

Thanks

This study is not supported by any external funds. Preliminary results of this study have been presented at the 74th Geological Congress of Turkey (Ankara/ Türkiye). The authors would like to thank Bahadır Madencilik Co. for sampling permission; to Mr. Vakkas KARAOĞLU and Mr. Vedat Gök (Bahadır Madencilik Co.) for their assistance during the field work; Dr. Emine CİCİOĞLU -Sütçü, Mr. Yılmaz BULUT, Mr. Bülent BAŞARA, Mr. Arif TALAY, and Mr. Ufuk KİBAR (MTA) for their help at different stages of the analytical procedures; and Prof. Dr. James HOWER (University of Kentucky, Center for Applied Energy Research) for his comments and suggestions during the manuscript preparation.

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