Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia

The Luconia Province – offshore Sarawak – is a key geological unit for understanding the distribution of hydrocarbon resources in Malaysia. Nevertheless, little effort has been made to address the palaeoenvironmental characteristics of the Tertiary carbonates in the key sector of Central Luconia. We...

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Main Authors: Janjuhah, H.T., GÁmez Vintaned, J.A., Salim, A.M.A., Faye, I., Shah, M.M., Ghosh, D.P.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.19336 /
Published: Wiley-Blackwell Publishing Asia 2017
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034050538&doi=10.1111%2f1755-6724.13411&partnerID=40&md5=53aaa46c7c409f4cddf1409d95709b8e
http://eprints.utp.edu.my/19336/
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spelling utp-eprints.193362018-04-23T03:11:45Z Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia Janjuhah, H.T. GÁmez Vintaned, J.A. Salim, A.M.A. Faye, I. Shah, M.M. Ghosh, D.P. The Luconia Province – offshore Sarawak – is a key geological unit for understanding the distribution of hydrocarbon resources in Malaysia. Nevertheless, little effort has been made to address the palaeoenvironmental characteristics of the Tertiary carbonates in the key sector of Central Luconia. We study the sedimentology and petrography of core samples from a well in Central Luconia, for which thirteen microfacies have been identified reflecting different depositional settings. This is the first microfacies scheme elaborated for Luconian carbonates. Lithofacies and microfacies distribution are compatible with deposition in a reef complex, originating around a framework reef, within the euphotic zone. Sediments were deposited in environments of backreef, reef crest, and forereef. The fair weather wave base is marked by the presence of coralline red algae, foraminifera, decreasing degree of bioclast fragmentation and other microfacies features. As a result, a depositional-environmental model is constructed, depicting a reef complex built around a framework reef developed on the margin of an isolated platform. In addition, an innovative, preliminary time series analysis of facies, microfacies and depositional environment data reveal the existence of seasonal cycles in the stacking patterns of facies and microfacies. © 2017 Geological Society of China Wiley-Blackwell Publishing Asia 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034050538&doi=10.1111%2f1755-6724.13411&partnerID=40&md5=53aaa46c7c409f4cddf1409d95709b8e Janjuhah, H.T. and GÁmez Vintaned, J.A. and Salim, A.M.A. and Faye, I. and Shah, M.M. and Ghosh, D.P. (2017) Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia. Acta Geologica Sinica, 91 (5). pp. 1778-1796. http://eprints.utp.edu.my/19336/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The Luconia Province – offshore Sarawak – is a key geological unit for understanding the distribution of hydrocarbon resources in Malaysia. Nevertheless, little effort has been made to address the palaeoenvironmental characteristics of the Tertiary carbonates in the key sector of Central Luconia. We study the sedimentology and petrography of core samples from a well in Central Luconia, for which thirteen microfacies have been identified reflecting different depositional settings. This is the first microfacies scheme elaborated for Luconian carbonates. Lithofacies and microfacies distribution are compatible with deposition in a reef complex, originating around a framework reef, within the euphotic zone. Sediments were deposited in environments of backreef, reef crest, and forereef. The fair weather wave base is marked by the presence of coralline red algae, foraminifera, decreasing degree of bioclast fragmentation and other microfacies features. As a result, a depositional-environmental model is constructed, depicting a reef complex built around a framework reef developed on the margin of an isolated platform. In addition, an innovative, preliminary time series analysis of facies, microfacies and depositional environment data reveal the existence of seasonal cycles in the stacking patterns of facies and microfacies. © 2017 Geological Society of China
format Article
author Janjuhah, H.T.
GÁmez Vintaned, J.A.
Salim, A.M.A.
Faye, I.
Shah, M.M.
Ghosh, D.P.
spellingShingle Janjuhah, H.T.
GÁmez Vintaned, J.A.
Salim, A.M.A.
Faye, I.
Shah, M.M.
Ghosh, D.P.
Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia
author_sort Janjuhah, H.T.
title Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia
title_short Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia
title_full Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia
title_fullStr Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia
title_full_unstemmed Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia
title_sort microfacies and depositional environments of miocene isolated carbonate platforms from central luconia, offshore sarawak, malaysia
publisher Wiley-Blackwell Publishing Asia
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034050538&doi=10.1111%2f1755-6724.13411&partnerID=40&md5=53aaa46c7c409f4cddf1409d95709b8e
http://eprints.utp.edu.my/19336/
_version_ 1741196190442061824
score 11.62408

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