The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia
Over the past century, a wide variety of poorly dated sediments that unconformably overlie pre-Neogene rocks in Sulawesi have been assigned to the Celebes Molasse and interpreted as post-orogenic rocks deposited after a major collision. New data from fieldwork and laboratory studies, including miner...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/161638 |
| _version_ | 1826123435503255552 |
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| author | Nugraha, Abang Mansyursyah Surya Hall, Robert BouDagher-Fadel, Marcelle |
| author2 | Earth Observatory of Singapore |
| author_facet | Earth Observatory of Singapore Nugraha, Abang Mansyursyah Surya Hall, Robert BouDagher-Fadel, Marcelle |
| author_sort | Nugraha, Abang Mansyursyah Surya |
| collection | NTU |
| description | Over the past century, a wide variety of poorly dated sediments that unconformably overlie pre-Neogene rocks in Sulawesi have been assigned to the Celebes Molasse and interpreted as post-orogenic rocks deposited after a major collision. New data from fieldwork and laboratory studies, including mineralogical, palaeontological and zircon geochronological analyses, provide the basis for a new Neogene stratigraphy and show that sediments assigned to the Celebes Molasse have significant variations in age, environment of deposition, composition and sedimentation history. Identified unconformities in the (1) Early Miocene (c. 23 Ma), (2) Middle Miocene (c. 15 Ma), (3) Mio-Pliocene (c. 6–5.3 Ma), and (4 and 5) Pleistocene (c. 1.8 and 0.1 Ma) separate Lower Miocene, Middle to Upper Miocene, Pliocene, Pleistocene and Holocene mega-sequences. These mega-sequences resulted from Early Miocene collision followed by extension, driven by subduction rollback, causing both uplift and subsidence, in contrast to previous interpretations of multiple collisions. |
| first_indexed | 2024-10-01T06:04:37Z |
| format | Journal Article |
| id | ntu-10356/161638 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:04:37Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1616382022-09-17T23:31:01Z The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia Nugraha, Abang Mansyursyah Surya Hall, Robert BouDagher-Fadel, Marcelle Earth Observatory of Singapore Science::Geology Celebes Molasse Sulawesi Over the past century, a wide variety of poorly dated sediments that unconformably overlie pre-Neogene rocks in Sulawesi have been assigned to the Celebes Molasse and interpreted as post-orogenic rocks deposited after a major collision. New data from fieldwork and laboratory studies, including mineralogical, palaeontological and zircon geochronological analyses, provide the basis for a new Neogene stratigraphy and show that sediments assigned to the Celebes Molasse have significant variations in age, environment of deposition, composition and sedimentation history. Identified unconformities in the (1) Early Miocene (c. 23 Ma), (2) Middle Miocene (c. 15 Ma), (3) Mio-Pliocene (c. 6–5.3 Ma), and (4 and 5) Pleistocene (c. 1.8 and 0.1 Ma) separate Lower Miocene, Middle to Upper Miocene, Pliocene, Pleistocene and Holocene mega-sequences. These mega-sequences resulted from Early Miocene collision followed by extension, driven by subduction rollback, causing both uplift and subsidence, in contrast to previous interpretations of multiple collisions. Nanyang Technological University Published version This research was a project of the SE Asia Research Group (SEARG) supported by a consortium of oil companies who funded the PhD of the first author. This research was supported by the Earth Observatory of Singapore and comprises EOS contribution number 381. 2022-09-13T02:41:55Z 2022-09-13T02:41:55Z 2022 Journal Article Nugraha, A. M. S., Hall, R. & BouDagher-Fadel, M. (2022). The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia. Journal of Asian Earth Sciences, 228, 105140-. https://dx.doi.org/10.1016/j.jseaes.2022.105140 1367-9120 https://hdl.handle.net/10356/161638 10.1016/j.jseaes.2022.105140 2-s2.0-85126088383 228 105140 en Journal of Asian Earth Sciences © 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf |
| spellingShingle | Science::Geology Celebes Molasse Sulawesi Nugraha, Abang Mansyursyah Surya Hall, Robert BouDagher-Fadel, Marcelle The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia |
| title | The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia |
| title_full | The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia |
| title_fullStr | The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia |
| title_full_unstemmed | The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia |
| title_short | The Celebes Molasse: a revised Neogene stratigraphy for Sulawesi, Indonesia |
| title_sort | celebes molasse a revised neogene stratigraphy for sulawesi indonesia |
| topic | Science::Geology Celebes Molasse Sulawesi |
| url | https://hdl.handle.net/10356/161638 |
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