Sedimentology and tectonics of the collision complex in the east arm of Sulawesi Indonesia
An imbricated Mesozoic to Palaeogene continental margin sequence is juxtaposed with ophiolitic rocks in the East Arm of Sulawesi, Indonesia. The two tectonic terranes are bounded by the Batui Thrust and Balantak Fault System, which are considered to be the surface expression of the collision zone be...
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ftholloway:oai:repository.royalholloway.ac.uk:bf7a78df-c538-4bff-a28d-983a91cf0634/1 2023-05-15T18:01:02+02:00 Sedimentology and tectonics of the collision complex in the east arm of Sulawesi Indonesia Simandjuntak, Tohap Oculair 1986 application/pdf https://repository.royalholloway.ac.uk/items/bf7a78df-c538-4bff-a28d-983a91cf0634/1/ eng eng https://repository.royalholloway.ac.uk/items/bf7a78df-c538-4bff-a28d-983a91cf0634/1/ Plate Tectonics info:eu-repo/semantics/doctoralThesis info:eu-repo/semantics/acceptedVersion 1986 ftholloway 2022-09-26T12:12:29Z An imbricated Mesozoic to Palaeogene continental margin sequence is juxtaposed with ophiolitic rocks in the East Arm of Sulawesi, Indonesia. The two tectonic terranes are bounded by the Batui Thrust and Balantak Fault System, which are considered to be the surface expression of the collision zone between the Banggai-Sula Platform and the Eastern Sulawesi Ophiolite Belt. The collision complex contains three distinctive sedimentary sequences : 1) Triassic-Palaeogene continental margin sediments, ii) Cretaceous pelagic sediments and iii) Neogene coarse clastic sediments and volcanogenic turbidites. (i) Late Triassic Lemo Beds consisting largely of carbonate-slope deposits and subsidiary clastics including quartz-rich lithic sandstones and lensoidal pebbly mudstone and conglomeratic breccia. The hemipelagic limestones are rich in micro-fossils. Some beds of the limestone contain bivalves and ammonites, including Misolia, which typifies the Triassic-Jurassic sequence of eastern Indonesia. The Jurassic Kapali Beds are dominated by quartzose arenites containing significant amounts of plant remains and lumps of coal. The Late Jurassic sediments consist of neritic carbonate deposits (Nambo Beds and Sinsidik Beds) containing ammonites and belemnites, including Belemnopsis uhligi Stevens, of Late Jurassic age. The Jurassic sediments are overlain unconformably by Late Cretaceous Luok Beds which are predominantly calcilutite with chert nodules rich in microfossils. The Luok Beds are unconformably overlain by the Palaeogene Salodik Limestones which consist of carbonate platform sediments rich in both benthic and planktonic foraminifera of Eocene to Early Miocene age. These sediments were deposited on the continental margin of the Banggai-Sula Platform. (ii) Deep-sea sediments (Boba Beds) consist largely of chert and subsidiary calcilutite rich in radiolaria of Cretaceous age. These rocks are part of an ophiolite suite. (iii) Coarse clastic sediments (Kolo Beds and Biak Conglomerates) are typical post-orogenic clastic rocks ... Doctoral or Postdoctoral Thesis Planktonic foraminifera Royal Holloway University of London: Royal Holloway Digital Repository East Arm ENVELOPE(62.875,62.875,-67.600,-67.600) Kolo ENVELOPE(30.981,30.981,65.923,65.923) |
institution |
Open Polar |
collection |
Royal Holloway University of London: Royal Holloway Digital Repository |
op_collection_id |
ftholloway |
language |
English |
topic |
Plate Tectonics |
spellingShingle |
Plate Tectonics Simandjuntak, Tohap Oculair Sedimentology and tectonics of the collision complex in the east arm of Sulawesi Indonesia |
topic_facet |
Plate Tectonics |
description |
An imbricated Mesozoic to Palaeogene continental margin sequence is juxtaposed with ophiolitic rocks in the East Arm of Sulawesi, Indonesia. The two tectonic terranes are bounded by the Batui Thrust and Balantak Fault System, which are considered to be the surface expression of the collision zone between the Banggai-Sula Platform and the Eastern Sulawesi Ophiolite Belt. The collision complex contains three distinctive sedimentary sequences : 1) Triassic-Palaeogene continental margin sediments, ii) Cretaceous pelagic sediments and iii) Neogene coarse clastic sediments and volcanogenic turbidites. (i) Late Triassic Lemo Beds consisting largely of carbonate-slope deposits and subsidiary clastics including quartz-rich lithic sandstones and lensoidal pebbly mudstone and conglomeratic breccia. The hemipelagic limestones are rich in micro-fossils. Some beds of the limestone contain bivalves and ammonites, including Misolia, which typifies the Triassic-Jurassic sequence of eastern Indonesia. The Jurassic Kapali Beds are dominated by quartzose arenites containing significant amounts of plant remains and lumps of coal. The Late Jurassic sediments consist of neritic carbonate deposits (Nambo Beds and Sinsidik Beds) containing ammonites and belemnites, including Belemnopsis uhligi Stevens, of Late Jurassic age. The Jurassic sediments are overlain unconformably by Late Cretaceous Luok Beds which are predominantly calcilutite with chert nodules rich in microfossils. The Luok Beds are unconformably overlain by the Palaeogene Salodik Limestones which consist of carbonate platform sediments rich in both benthic and planktonic foraminifera of Eocene to Early Miocene age. These sediments were deposited on the continental margin of the Banggai-Sula Platform. (ii) Deep-sea sediments (Boba Beds) consist largely of chert and subsidiary calcilutite rich in radiolaria of Cretaceous age. These rocks are part of an ophiolite suite. (iii) Coarse clastic sediments (Kolo Beds and Biak Conglomerates) are typical post-orogenic clastic rocks ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Simandjuntak, Tohap Oculair |
author_facet |
Simandjuntak, Tohap Oculair |
author_sort |
Simandjuntak, Tohap Oculair |
title |
Sedimentology and tectonics of the collision complex in the east arm of Sulawesi Indonesia |
title_short |
Sedimentology and tectonics of the collision complex in the east arm of Sulawesi Indonesia |
title_full |
Sedimentology and tectonics of the collision complex in the east arm of Sulawesi Indonesia |
title_fullStr |
Sedimentology and tectonics of the collision complex in the east arm of Sulawesi Indonesia |
title_full_unstemmed |
Sedimentology and tectonics of the collision complex in the east arm of Sulawesi Indonesia |
title_sort |
sedimentology and tectonics of the collision complex in the east arm of sulawesi indonesia |
publishDate |
1986 |
url |
https://repository.royalholloway.ac.uk/items/bf7a78df-c538-4bff-a28d-983a91cf0634/1/ |
long_lat |
ENVELOPE(62.875,62.875,-67.600,-67.600) ENVELOPE(30.981,30.981,65.923,65.923) |
geographic |
East Arm Kolo |
geographic_facet |
East Arm Kolo |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://repository.royalholloway.ac.uk/items/bf7a78df-c538-4bff-a28d-983a91cf0634/1/ |
_version_ |
1766170340999823360 |