GEOLOGY OF THE BUKIT BATU PUTEH-SATUN TRANSECT AREA ALONG THE MALAYSIA–THAILAND BORDER By The Malaysian and Thai Working Groups A joint project carried out by Minerals and Geoscience Department Malaysia and Department of Mineral Resources, Thailand The Malaysia-Thailand Border Joint Geological Survey Committee (MT-JGSC) 2009 LIBRARY CLASSIFICATION: Science Geoscience Geology Mapping Geology Published by and obtainable from: MINERALS AND GEOSCIENCE DEPARTMENT MALAYSIA (Jabatan Mineral dan Geosains Malaysia) 20th Floor, Tabung Haji Building Tun Razak Road 50658 Kuala Lumpur Malaysia Also obtainable from: TECHNICAL SERVICES DIVISION (Bahagian Perkhidmatan Teknikal) Minerals and Geoscience Department Malaysia (Jabatan Mineral dan Geosains Malaysia) Scrivenor Road off Sultan Azlan Shah Road 31400 Ipoh Perak Malaysia Price: RM60.00 Printed by: PERCETAKAN ZAINON KASSIM SDN. BHD. No. 1 & 3, Tingkat Kilang Kawasan Perindustrian Ringan Jelapang 30100 Ipoh, Perak Darul Ridzuan 2010 - iii - PREFACE This report together with the accompanying geological map on a scale 1:250,000 is the result of close co-operation between the Minerals and Geoscience Department Malaysia, and the Department of Mineral Resources, Thailand in resolving problems related to cross border geological correlation between Malaysia and Thailand. Fieldwork was carried out independently by geoscientists of the Minerals and Geoscience Department Malaysia, and of the Department of Mineral Resources, Thailand covering the individual territories in the year 2004 and 2005. The Transect covers an area of 829 square kilometres in Malaysia and approximately 1,400 square kilometres in Thailand. In Malaysia, field works had been carried out during the month of February, March, April, June and July 2004, and in February-March 2005. Quaternary geology study was carried out separately in March-April 2004. In Thailand, geological mapping of the Transect area was carried out during March-April 2004, and has been slightly revised in 2005. Problems on the discontinuity of time rock unit boundaries between the various rocks found in both sides of the common border areas have been satisfactorily resolved. Stratigraphic succession of rock units is well exposed for detailed studies in terms of stratigraphic correlation, palaeontology, and tectonics. Many geological sites can be studied in detail to be geoparks in the future. Although potential mineral deposits occur in small amount, limestone is extensively exploited in the Transect area particularly for the construction materials. Mr. Yunus bin Abdul Razak Mr. Adisak Thongkaimook Director-General, Director-General, Minerals and Geoscience Department Department of Mineral Resources, Malaysia. Thailand. June 2009 June 2009 - iv - ACKNOWLEDGEMENTS The Malaysian and Thai Working Groups would like to thank the Director General of the Minerals and Geoscience Department Malaysia (JMG) and the Director General of the Department of Mineral Resources, Thailand (DMR) for their encouragement, support and funding of this project. Thanks are extended to Dr. Chow Weng Sum, the then Director of Technical Services Division, Minerals and Geoscience Department Malaysia and Mrs. Benjawan Charukalas, the then Director of Bureau of Geological Survey, Department of Mineral Resources, Thailand, for their encouragements during the study. Thanks also to all officers and staffs of the Minerals and Geoscience Department Malaysia and Department of Mineral Resources, Thailand for their involvement in this project either directly or indirectly. The Malaysian and Thai military, provincials and border police officials are duly thanked for their assistance in the security matters especially during the field trips along the Malaysia-Thailand border security road. They also would like to express their gratitude to Professor Mohd Shafeea Leman of the Unversiti Kebangsaan Malaysia for his free consultation especially in identifying the brachiopod samples on the Malaysian side. To Professor Katsuo Sashida of Tsukuba University, Japan for his willingness to wash the chert and limestone samples collected from the Transect area, and then identified the radiolaria and conodonts Last but not least to all local residences for their support and assistance during the fieldwork. - v - Geology of Bukit Batu Puteh-Satun Transect area along the Malaysia- Thailand border by The Malaysian and Thai Working Groups EXECUTIVE SUMMARY Geological mapping on the scale of 1:50,000 in the Bukit Batu Puteh-Satun Transect area in Malaysia and Thailand had been carried out independently by the respective Working Groups covering the individual territories in the year 2004 and 2005. It covers an area of 829 square kilometres in Malaysia and approximately 1,400 square kilometres in Thailand. In Malaysia, field trips had been carried out during the month of February, March, April, June and July 2004, and in February-March 2005. Quaternary geology study was carried out separately in March-April 2004 to delineate the approximate boundary between the continental Quaternary deposits and the marine Quaternary deposits in this area. The working group had spent two to three weeks in the field for each trip. The Lower Palaeozoic to Quaternary rock units have been identified and their boundaries have been satisfactorily delineated based on data provided by previous workers incorporated with the new data gathered during the present study. In Thailand, geological mapping of the Transect area was carried out during March-April 2004. In 2005, geology of the Transect area had been slightly revised due to the new discoveries of index fossils and exposures in some formations. Fifteen lithological units have been identified in the Transect area, namely in ascending order; Tarutao Group (Є ), Lae Tong Formation (O ), Setul Formation/Thung tt lt Song Group (O ), Pa Samed Formation (SD ), Jentik Formation (D ), Kubang st/ts ps jt Pasu/Yaha Formation (C ), Khuan Klang Formation (C ), Lubok Sireh kp/yh kk formation/Khao Phra Formation (P ), Chuping/Khao Rub Chang/Chaiburi Formation sr/kr (PTr ), Kayu Hitam formation/Lam Thap Formation (K ), Arang/Sadao formation ch/kc/cb kh/lp (T ), Tangga/Hat Yai formation (Qp ), Simpang/Waeng Formation (Qp ), ar/sd tg/hy sp/wg Beruas/Sungai Kolok Formation (Qh ) and Gula/Tak Bai Formation (Qh ). br/sk gl/tb The oldest rock, the Tarutao Group (Є ) exposed only in Thailand. It comprises tt quartzitic and micaceous sandstones in the lower part, and light brown to brown, thin- to medium-bedded, laminated, medium-grained, moderately sorted micaceous sandstones intercalated with light grey, thin- to medium-bedded argillaceous limestone in the upper part. Probably Upper Cambrian in age, it is well correlatable with the Machinchang Formation of Malaysia that does not extend to the Transect area. The Setul Formation/Thung Song Group (O ) mainly consists of stylolitic limestone st/ts succession is exposed extensively on the middle part of the Transect area. The thickness of the succession is not less than 1,500 metres. Many fossil assemblages discovered in this rock unit as reported by previous workers indicate the age of this rock unit is Ordovician. However, in Malaysia, fossils of Silurian age are also present. This implies that the Setul Formation/Thung Song Group (O ) in Malaysia extends to the Silurian st/ts age. In Thailand, the Thung Song Group consists of Lae Tong Formation (O ) and Rung lt Nok Formation (O ) in ascending order; however the Lae Tong Formation (O ) is rn lt - vi - exposed only in Thailand. It consists mainly of grey to greyish black, recrystalline, thin- bedded limestone with argillaceous limestone interbedded with shale and nodular limestone. The Lae Tong Formation (O ) is believed to be older than Middle Ordovician lt in age, and is overlain by the Setul Formation/Thung Song Group (O ). st/ts The Pa Samed Formation (SD ) is exposed only in Thailand. It comprises grey to ps light grey, massive to thin-bedded mudstone, chert and siliceous mudstone. Fossils of Tentaculites, brachiopods, trilobites, and graptolites are abundant within this rock unit. The upper part of the Pa Samed Formation (SD ) is correlatable with the Devonian Jentik ps Formation (D ) of Malaysia. jt The Jentik Formation (D ) which is exposed only in Malaysia forms a condensed jt sequence representing a transitional sequence between the Setul Formation/Thung Song Group (O ) and underlies the Kubang Pasu/Yaha Formation (C ). It comprises st/ts kp/yh sequence of carbonaceous argillite, light coloured areno-argilite and red mudstone, and shale in ascending order. Fossil assemblages discovered in this rock unit imply the Devonian age. It is well correlatable with the upper part of the Silurian-Devonian Pa Samed Formation (SD ) of Thailand. ps The Khuan Klang Formation (C ) comprises light grey, brown to reddish brown, kk thick-bedded, laminated, fine- to very coarse-grained, poorly sorted, subrounded, poorly cemented mudstone intercalated with sandstone, conglomeratic sandstone and pebbly mudstone. Pebbles consist of quartz, sandstone and shale. This rock unit exposed only in Thailand, and it is assigned as Carboniferous in age by the presence of abundant bivalves, trilobites, brachiopod, gastropod, and crinoid fossils. It is contemporaneous with the Kubang Pasu/Yaha Formation (C ). kp/yh The Kubang Pasu/Yaha Formation (C ) consists predominantly of medium- to kp/yh thickly-bedded areno-argilite sequence, consisting of light grey medium- to coarse- grained lithic sandstone and lesser amounts of shale. The sandstone is well sorted, well cemented, medium- to very thick- bedded, and interbedded with light grey to yellowish brown shale, mudstone and chert. Minor amount of light grey to yellowish brown conglomerate is also observed. Posidonomya (bivalve) commonly occur, followed by trilobites and radiolarians. In Malaysia, thin-bedded chert with well-preserved radiolarian that indicates Early Carboniferous (Tournaisian) age is embedded in the lower part of the succession. The upper part of the succession comprises medium- to thick-bedded areno- argilite sequence with rare Posidonomya (bivalve). Fossil records imply that the age of the whole sequence of the Kubang Pasu/Yaha Formation (C ) is Carboniferous. kp/yh The Lubok Sireh formation/Khao Phra Formation (P ) consists of thick- to very sr/kr thick-bedded, obviously laminated, sequence of dark grey, mudstone, shale, siltstone and pebbly mudstone; exposed in the central to northern part of the Transect area. It is grading upward into interbedded of thin- to medium-bedded sandstone and black shale, and mudstone. The sandstone usually coarse-grained, poorly sorted, moderately rounded with poorly cemented pebbles of quarts, sandstone and shale. The rock unit consists of abundant bivalves, trilobites, brachiopod, gastropod and crinoid. Dropstone of glacial- marine origin are present in parts. The presence of brachiopods i.e. Spinomartinia and Brandoproductus imply the Sakmarian (Early Permian) age to this rock unit. The Chuping/Khao Rub Chang/Chaiburi Formation (PTr ) consists of massive ch/kc/cb dolomitic limestone and limestone (at the lower part), significant amount of sandstone and shale (middle part), and crystalline limestone (upper part). The grey to dark grey, well-bedded, medium- to thick-bedded dolomitic limestone and limestone; rich in
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