Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia

The Kuamut Melange is located in the Kunak district, southeast Sabah. The mélange consists of clasts and blocks of broken Paleogene formations, and dismembered ophiolite blocks embedded in shale matrix. Fourteen samples were collected from sections S1 and S2 of the Kuamut Melange. A total of 45 spec...

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Main Authors:	Basir Jasin, Junaidi Asis
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2013
Online Access:	http://journalarticle.ukm.my/6148/ http://journalarticle.ukm.my/6148/ http://journalarticle.ukm.my/6148/1/02_Junaidi-1.pdf

id	ukm-6148
recordtype	eprints
spelling	ukm-61482016-12-14T06:40:28Z http://journalarticle.ukm.my/6148/ Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia Basir Jasin, Junaidi Asis, The Kuamut Melange is located in the Kunak district, southeast Sabah. The mélange consists of clasts and blocks of broken Paleogene formations, and dismembered ophiolite blocks embedded in shale matrix. Fourteen samples were collected from sections S1 and S2 of the Kuamut Melange. A total of 45 species of radiolarians have been identified and only 36 selected species are used for age determination. Three assemblages (I-III) were identified. Assemblage I consists of Dictyomitra excellence, Crucella bossoensis, Hiscocapsa asseni, Hexapyramis precedis, Thanarla brouweri, Acanthocircus levis, Obeliscoites vinassai, Stichomitra communis, Staurosphaeretta longispina, Xitus spicularius, Triactoma cellulosa, and Dactyliosphaera maxima. This assemblage is marked by the occurrence of Crucella gavalai indicative of Aptian to Albian in age. Assemblage II was characterized by zonal maker Xitus mclaughlini. Other species in this assemblage are Xitus spinosus, Stichomitra tosaensis, Dictyomitra gracilis, Dictyomitra montisserei, Pseudodictyomitra pseudomacrocephala, Pessagnobrachia fabianii, Crucella messinae, Tuguriella pagoda, Dictyomitra obesa, Triactoma paronai, Rhopalosyringium euganeum, Acanthocircus venetus, Acaeniotyle rebelis, Dictyomitra formosa, Pseudodictyomitra tiara and Patellula helios. This assemblage ranges from Albian to Cenomanian. Assemblages III is represented by zonal maker Crucella cachensis and others species in this assemblage are Hemicryptocapsa polyhedra, Eostichomitra bonum, Pseudotheocampe tina, Ultranapora cretacea and Alievium superbum. Assemblage III is Turonian in age. The radiolarian assemblages suggest that the age of chert blocks ranges from Aptian to Turonian, Cretaceous. The cherts were originally deposited on an oceanic crust of a marginal basin during Cretaceous and were tectonically deformed to form melange in Miocene time. Universiti Kebangsaan Malaysia 2013-05 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/6148/1/02_Junaidi-1.pdf Basir Jasin, and Junaidi Asis, (2013) Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia. Sains Malaysiana, 42 (5). pp. 561-570. ISSN 0126-6039 http://www.ukm.my/jsm/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	The Kuamut Melange is located in the Kunak district, southeast Sabah. The mélange consists of clasts and blocks of broken Paleogene formations, and dismembered ophiolite blocks embedded in shale matrix. Fourteen samples were collected from sections S1 and S2 of the Kuamut Melange. A total of 45 species of radiolarians have been identified and only 36 selected species are used for age determination. Three assemblages (I-III) were identified. Assemblage I consists of Dictyomitra excellence, Crucella bossoensis, Hiscocapsa asseni, Hexapyramis precedis, Thanarla brouweri, Acanthocircus levis, Obeliscoites vinassai, Stichomitra communis, Staurosphaeretta longispina, Xitus spicularius, Triactoma cellulosa, and Dactyliosphaera maxima. This assemblage is marked by the occurrence of Crucella gavalai indicative of Aptian to Albian in age. Assemblage II was characterized by zonal maker Xitus mclaughlini. Other species in this assemblage are Xitus spinosus, Stichomitra tosaensis, Dictyomitra gracilis, Dictyomitra montisserei, Pseudodictyomitra pseudomacrocephala, Pessagnobrachia fabianii, Crucella messinae, Tuguriella pagoda, Dictyomitra obesa, Triactoma paronai, Rhopalosyringium euganeum, Acanthocircus venetus, Acaeniotyle rebelis, Dictyomitra formosa, Pseudodictyomitra tiara and Patellula helios. This assemblage ranges from Albian to Cenomanian. Assemblages III is represented by zonal maker Crucella cachensis and others species in this assemblage are Hemicryptocapsa polyhedra, Eostichomitra bonum, Pseudotheocampe tina, Ultranapora cretacea and Alievium superbum. Assemblage III is Turonian in age. The radiolarian assemblages suggest that the age of chert blocks ranges from Aptian to Turonian, Cretaceous. The cherts were originally deposited on an oceanic crust of a marginal basin during Cretaceous and were tectonically deformed to form melange in Miocene time.
format	Article
author	Basir Jasin, Junaidi Asis,
spellingShingle	Basir Jasin, Junaidi Asis, Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia
author_facet	Basir Jasin, Junaidi Asis,
author_sort	Basir Jasin,
title	Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia
title_short	Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia
title_full	Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia
title_fullStr	Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia
title_full_unstemmed	Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia
title_sort	aptian to turonian radiolarians from chert blocks in the kuamut melange, sabah, malaysia
publisher	Universiti Kebangsaan Malaysia
publishDate	2013
url	http://journalarticle.ukm.my/6148/ http://journalarticle.ukm.my/6148/ http://journalarticle.ukm.my/6148/1/02_Junaidi-1.pdf
first_indexed	2023-09-18T19:46:07Z
last_indexed	2023-09-18T19:46:07Z
_version_	1777405911142236160

Aptian to turonian radiolarians from chert blocks in the Kuamut Melange, Sabah, Malaysia

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