Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge
The Poso Depression provides a record of Plio-Pleistocene environments and palaeogeography of Central Sulawesi. Outcrop-based sedimentological and provenance studies suggest that during the Pliocene the Poso Depression was a sea channel connecting Gorontalo and Bone bays formed in an asymmetric half...
Saved in:
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/169966 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-169966 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-1699662023-08-21T15:31:03Z Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge Nugraha, Abang Mansyursyah Surya Adhitama, Ramadhan Switzer, Adam D. Hall, Robert Asian School of the Environment Earth Observatory of Singapore Social sciences::Geography Palaeogeography Sedimentation History The Poso Depression provides a record of Plio-Pleistocene environments and palaeogeography of Central Sulawesi. Outcrop-based sedimentological and provenance studies suggest that during the Pliocene the Poso Depression was a sea channel connecting Gorontalo and Bone bays formed in an asymmetric half-graben. The Pliocene history began with deposition of the Puna Formation with fan deltas at the eastern basin margin and channel complexes in the deep-water basin further east. Analyses of light and heavy minerals indicate the main sediment source was ultrabasic rocks in East Sulawesi with minor and intermittent magmatic and metamorphic input from West Sulawesi. Later, in the Middle to Late Pliocene, carbonates of the Poso Formation accumulated on the eastern basin margin. They are unconformably overlain by shallow marine glaucophane-rich siliciclastics of the Pleistocene Lage Formation that are associated with the rapid exhumation and uplift of the Pompangeo metamorphic complex. This uplift led to the development of a land bridge connecting western and eastern Sulawesi. The terrane evolution favoured increasing the area of exposed land due to rapid tectonic uplift, which when combined with the tropical climate, contributed to faunal speciation and dispersal in Sulawesi. Nanyang Technological University Published version This study was supported by the SE Asia Research Group of Royal Holloway University of London, United Kingdom, which is backed by a consortium of oil companies. This research was also supported by the Earth Observatory of Singapore (EOS), Singapore and comprises EOS contribution number 508. 2023-08-16T08:11:58Z 2023-08-16T08:11:58Z 2023 Journal Article Nugraha, A. M. S., Adhitama, R., Switzer, A. D. & Hall, R. (2023). Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge. Journal of Palaeogeography, 12(3), 331-357. https://dx.doi.org/10.1016/j.jop.2023.05.003 2524-4507 https://hdl.handle.net/10356/169966 10.1016/j.jop.2023.05.003 2-s2.0-85161613877 3 12 331 357 en Journal of Palaeogeography © 2023 The Author(s). Published by Elsevier B.V. on behalf of China University of Petroleum (Beijing). This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
Social sciences::Geography Palaeogeography Sedimentation History |
spellingShingle |
Social sciences::Geography Palaeogeography Sedimentation History Nugraha, Abang Mansyursyah Surya Adhitama, Ramadhan Switzer, Adam D. Hall, Robert Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge |
description |
The Poso Depression provides a record of Plio-Pleistocene environments and palaeogeography of Central Sulawesi. Outcrop-based sedimentological and provenance studies suggest that during the Pliocene the Poso Depression was a sea channel connecting Gorontalo and Bone bays formed in an asymmetric half-graben. The Pliocene history began with deposition of the Puna Formation with fan deltas at the eastern basin margin and channel complexes in the deep-water basin further east. Analyses of light and heavy minerals indicate the main sediment source was ultrabasic rocks in East Sulawesi with minor and intermittent magmatic and metamorphic input from West Sulawesi. Later, in the Middle to Late Pliocene, carbonates of the Poso Formation accumulated on the eastern basin margin. They are unconformably overlain by shallow marine glaucophane-rich siliciclastics of the Pleistocene Lage Formation that are associated with the rapid exhumation and uplift of the Pompangeo metamorphic complex. This uplift led to the development of a land bridge connecting western and eastern Sulawesi. The terrane evolution favoured increasing the area of exposed land due to rapid tectonic uplift, which when combined with the tropical climate, contributed to faunal speciation and dispersal in Sulawesi. |
author2 |
Asian School of the Environment |
author_facet |
Asian School of the Environment Nugraha, Abang Mansyursyah Surya Adhitama, Ramadhan Switzer, Adam D. Hall, Robert |
format |
Article |
author |
Nugraha, Abang Mansyursyah Surya Adhitama, Ramadhan Switzer, Adam D. Hall, Robert |
author_sort |
Nugraha, Abang Mansyursyah Surya |
title |
Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge |
title_short |
Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge |
title_full |
Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge |
title_fullStr |
Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge |
title_full_unstemmed |
Plio-Pleistocene sedimentation and palaeogeographic reconstruction in the Poso Depression, Central Sulawesi, Indonesia: from a sea channel to a land bridge |
title_sort |
plio-pleistocene sedimentation and palaeogeographic reconstruction in the poso depression, central sulawesi, indonesia: from a sea channel to a land bridge |
publishDate |
2023 |
url |
https://hdl.handle.net/10356/169966 |
_version_ |
1779156559433039872 |