Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia
Ombilin Basin is well-known as one of the largest coal-producing basins in Indonesia. There is no comprehensive study conducted regarding the relationship between petrographical characteristics and coal properties in the area. The results of the petrographic study on Ombilin coal are dominated by vi...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Union of Iraqi geoogists
2022
|
| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/282032/1/Patria%20et%20al%20-%202022%20-%20Microfacies%20and%20Depositional%20Environment.pdf |
| _version_ | 1797037520175759360 |
|---|---|
| author | Patria, Aulia Agus Anggara, Ferian |
| author_facet | Patria, Aulia Agus Anggara, Ferian |
| author_sort | Patria, Aulia Agus |
| collection | UGM |
| description | Ombilin Basin is well-known as one of the largest coal-producing basins in Indonesia. There is no comprehensive study conducted regarding the relationship between petrographical characteristics and coal properties in the area. The results of the petrographic study on Ombilin coal are dominated by vitrinite (45.82-72.21 col.), liptinite (14.91-42.55 vol.), inertinite (15.19-25.68 vol.), and mineral matter (0.36-11.45 vol.) which is mostly dominated by pyrite. Based on the maceral association, Ombilin coal is distinguished into five groups; telovitrinite-rich group, detrovitrinite-rich group, telovitrinite-liptinite-rich group, telovitrinite-inertinite-rich group, and inertinite-rich group. A similar correlation is found between maceral and maceral-precursor abundances in modern tropical peat in Indonesia. The basal section of Ombilin coal is interpreted to be composed of sapric and hemic peat, represented by the detrovitrinite-rich and telovitrinite-liptinite-rich groups, middle section is distinct due to the high content of the telovitrinite-rich and inertinite-rich groups, these groups are derived from fine hemic and hemic peat. The top section is dominated by inertinite-rich and detrovitrinite-rich groups and is typically comprised of fibric peat. Correlation between vertical section and maceral abundances represent the evolution changes from topogenous mire to ombrogenous mire. Coal facies and distribution of critical macerals suggest that the coal is derived from degraded woody plant tissues and marginal aquatic or herbaceous plants. The depositional environment of the precursor plants was deposited in wet forest swamp conditions and exhibited transition from limnic to limno-telmatic environment. © 2022, Union of Iraqi Geologists. All rights reserved. |
| first_indexed | 2024-03-14T00:04:32Z |
| format | Article |
| id | oai:generic.eprints.org:282032 |
| institution | Universiti Gadjah Mada |
| language | English |
| last_indexed | 2024-03-14T00:04:32Z |
| publishDate | 2022 |
| publisher | Union of Iraqi geoogists |
| record_format | dspace |
| spelling | oai:generic.eprints.org:2820322023-12-01T07:43:55Z https://repository.ugm.ac.id/282032/ Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia Patria, Aulia Agus Anggara, Ferian Geomatic Engineering not elsewhere classified Ombilin Basin is well-known as one of the largest coal-producing basins in Indonesia. There is no comprehensive study conducted regarding the relationship between petrographical characteristics and coal properties in the area. The results of the petrographic study on Ombilin coal are dominated by vitrinite (45.82-72.21 col.), liptinite (14.91-42.55 vol.), inertinite (15.19-25.68 vol.), and mineral matter (0.36-11.45 vol.) which is mostly dominated by pyrite. Based on the maceral association, Ombilin coal is distinguished into five groups; telovitrinite-rich group, detrovitrinite-rich group, telovitrinite-liptinite-rich group, telovitrinite-inertinite-rich group, and inertinite-rich group. A similar correlation is found between maceral and maceral-precursor abundances in modern tropical peat in Indonesia. The basal section of Ombilin coal is interpreted to be composed of sapric and hemic peat, represented by the detrovitrinite-rich and telovitrinite-liptinite-rich groups, middle section is distinct due to the high content of the telovitrinite-rich and inertinite-rich groups, these groups are derived from fine hemic and hemic peat. The top section is dominated by inertinite-rich and detrovitrinite-rich groups and is typically comprised of fibric peat. Correlation between vertical section and maceral abundances represent the evolution changes from topogenous mire to ombrogenous mire. Coal facies and distribution of critical macerals suggest that the coal is derived from degraded woody plant tissues and marginal aquatic or herbaceous plants. The depositional environment of the precursor plants was deposited in wet forest swamp conditions and exhibited transition from limnic to limno-telmatic environment. © 2022, Union of Iraqi Geologists. All rights reserved. Union of Iraqi geoogists 2022 Article PeerReviewed application/pdf en https://repository.ugm.ac.id/282032/1/Patria%20et%20al%20-%202022%20-%20Microfacies%20and%20Depositional%20Environment.pdf Patria, Aulia Agus and Anggara, Ferian (2022) Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia. Iraqi Geological Journal, 55 (1). 128 -146. ISSN 24146064 https://igj-iraq.org/igj/index.php/igj/article/view/782/865 10.46717/igj.55.1E.11Ms-2022-05-27 |
| spellingShingle | Geomatic Engineering not elsewhere classified Patria, Aulia Agus Anggara, Ferian Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia |
| title | Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia |
| title_full | Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia |
| title_fullStr | Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia |
| title_full_unstemmed | Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia |
| title_short | Microfacies and Depositional Environment of the Eocene Sawahlunto Coal, Ombilin Basin, Indonesia |
| title_sort | microfacies and depositional environment of the eocene sawahlunto coal ombilin basin indonesia |
| topic | Geomatic Engineering not elsewhere classified |
| url | https://repository.ugm.ac.id/282032/1/Patria%20et%20al%20-%202022%20-%20Microfacies%20and%20Depositional%20Environment.pdf |
| work_keys_str_mv | AT patriaauliaagus microfaciesanddepositionalenvironmentoftheeocenesawahluntocoalombilinbasinindonesia AT anggaraferian microfaciesanddepositionalenvironmentoftheeocenesawahluntocoalombilinbasinindonesia |