Mesozoic tectono-sedimentary evolution of the Banda Arc area

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doi: 10.1306/A9675066-1738-11D7-8645000102C1865D
Author(s): Thurow, Jürgen; Milsom, John; Roques, Delphine
Author Affiliation(s): Primary:
University College London, London, United Kingdom
Volume Title: AAPG international conference and exhibition; abstracts
Source: AAPG Bulletin, 84(9), p.1505-1506; AAPG international conference and exhibition, Bali, Indonesia, Oct. 15 - 18, 2000. Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States. ISSN: 0149-1423 CODEN: AABUD2
Note: In English
Summary: The Banda Arc lies at the centre of the East Indonesian triple junction, the region of interaction between the Eurasian and Australian plates and Pacific-related microplates. Comparative studies of Mesozoic sediments on Buru, Buton, Seram, eastern Sulawesi and plateaus off the NW Australian Shelf (Ocean Drilling Program, Legs 122,123) are gradually defining the development of hydrocarbon systems in this frontier exploration area. Pre-collision sediments record a complicated rift-drift-history from considerable higher latitudes at the NW Australian continental margin during the Mesozoic and include source and reservoir rocks (e.g. Triassic sandstone and platform carbonates/black shales), some of which show oil, oil seeps, asphalt (E. Sulawesi & Buton, Buru, Seram). These sediments represent the rifting phase off NW Australia. Widespread, but condensed juvenile oceanic sediments with abundant macrofossils of Late Jurassic age overlie them. In some areas this sequence is preceded by a volcanic phase with basaltic lava and abundant ash layers. From the Early Cretaceous onward sediments are uniformly pelagic throughout the area with abundant radiolaria. The Late Cretaceous is characterised by "couches rouges" facies rich in calcareous plankton. The first Eurasian microfaunal elements occur as early as Maastrichtian, indicating the beginning of collision. Faunal correlations are of special importance. Microfaunas in the Mesozoic pelagic sediments of NW-Australia are of typical Austral affinities (high latitude) and clearly distinctive from Tethyan faunas; those from the Banda Arc show a mixture of Austral and Tethyan faunal elements. Sediments have been deposited in a more subtropical environment within the transitional zone between Tethyan and Austral waters.
Year of Publication: 2000
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 29 Economic Geology, Energy Sources; Assemblages; Banda Arc; Correlation; East Indonesian triple junction; Fossiliferous materials; Leg 122; Leg 123; Marine environment; Mesozoic; Ocean Drilling Program; Pacific Ocean; Petroleum; Petroleum exploration; Plate tectonics; Reservoir rocks; Rifting; Sedimentary rocks; Source rocks; Tectonics; Well-logging; West Pacific
Coordinates: S203512 S163357 E1153337 E1121231
S195557 S155831 E1173430 E1102714
Record ID: 2000072536
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States