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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 167 - 185 (19page)
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Geochemistry, paleoweathering, provenance, tectonic setting, paleoclimate and paleoenvironment of deposition of offshore Miocene sedimentary rocks in the West Baram Delta have been examined through multi-element geochemistry and mineralogy. Materials and methods used in the study include ninety four core samples from four subsurface wells, XRF, thin sections and FESEM. Four main groups of samples are identified in the wells: porous sandstones, cemented sandstones, siltstones and mudstones. The sandstones are classified as sublitharenites, litharenites and Fe-rich sandstones based on chemical composition and mineralogy. Variations in compositional trends suggest strong lithological and diagenetic controls on the geochemical composition of the samples. Petrography of the samples indicates that they are composed mainly of quartz, K-feldspar, siderite and clay minerals. The samples are characterized by moderate to high degree of chemical weathering with CIA values between 52–76 and PIA values from 65–100. Provenance analysis of the samples shows predominantly felsic and intermediate igneous provenance with minor mafic contribution. The samples are inferred to have originated from a passive margin tectonic setting that followed the continental collision and rifting stages of the foreland basin development phase of the Sarawak Basin. The paleoclimate of deposition of the samples is interpreted to be warm and humid enhancing the chemical weathering. The paleoenvironment of deposition is predominantly suboxic to anoxic.
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참고문헌 (78)
참고문헌 신청
Armstrong-Altrin, J.S. / 2005 / Critical evaluation of six tectonic setting discrimination diagrams using geochemical data of Neogene sediments from known tectonic setting / Sedimentary Geology 177:115~129
Ben-Awuah, J. / 2014 / Impact of bioturbation on reservoir quality: A case study of biogenically reduced permeabilities of reservoir sandstones of the Baram Delta, Sarawak, Malaysia / Journal of Applied Sciences 14:3312~3317
Ben-Awuah, J. / 2015 / Effect of bioturbation on reservoir rock quality of sandstones: A case study from the Baram Delta, offshore Sarawak, Malaysia / Journal of Petroleum Exploration and Development 42:1~9
Bhatia, M.R. / 1986 / Trace-element characteristics of greywacke and tectonic setting discrimination of sedimentary basins / Contributions to Mineralogy and Petrology 92:181~193
Bjorlykke, K. / 1998 / Clay mineral diagenesis in sedimentary basins – a key to prediction of rock properties: examples from the North Sea Basin / Clay Minerals 33:15~34
Ben-Awuah, J. / 2014 / Impact of bioturbation on reservoir quality: A case study of biogenically reduced permeabilities of reservoir sandstones of the Baram Delta, Sarawak, Malaysia / Journal of Applied Sciences 14:3312~3317
Ben-Awuah, J. / 2015 / Effect of bioturbation on reservoir rock quality of sandstones: A case study from the Baram Delta, offshore Sarawak, Malaysia / Journal of Petroleum Exploration and Development 42:1~9
Bhatia, M.R. / 1986 / Trace-element characteristics of greywacke and tectonic setting discrimination of sedimentary basins / Contributions to Mineralogy and Petrology 92:181~193
Bjorlykke, K. / 1998 / Clay mineral diagenesis in sedimentary basins – a key to prediction of rock properties: examples from the North Sea Basin / Clay Minerals 33:15~34
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