Burial diagenesis in the Upper Devonian reef complexes of the Geikie Gorge region, Canning basin, Western Australia

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:6093860

Wallace, M W ^[1]; Kerans, C ^[2]; Playford, P E ^[3]; McManus, A ^[4]

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1. Univ. of Tasmania, Hobart (Australia)
2. Univ. of Texas, Austin (United States)
3. Geological Survey of Western Australia, East Perth (Australia)
4. National Centre for Petroleum Geology and Geophysics, Adelaide, South Australia (Australia)

The Devonian carbonates of the Geikie Gorge region, Canning basin, have undergone a long and complex diagenetic history that began in Devonian seawater with extensive marine cementation of platform-margin lithologies. Devonian-Lower Carboniferous burial diagenesis was the most important porosity occluding episode because almost all primary porosity was destroyed by equant calcite cements during this interval. Dolomitization and consequent secondary porosity development also occurred during early burial diagenesis. The distribution and geochemistry of the major calcite cements and dolomite types are consistent with these phases having been precipitated from connate marine or basinal brines. Karstification and minor calcite cementation took place during late Carboniferous subaerial exposure. Minor calcite cementation occurred during Permian-Cenozoic burial, predominantly in secondary porosity within pervasively dolomitized lithologies. Karstification, dedolomitization, and calcite recrystallization took place in association with Cenozoic meteoric diagenesis. Secondary moldic and intercrystalline porosity within the completely dolomitized lithologies were the longest lived porosity types in the carbonates. Some secondary porosity escaped both Devonian-Carboniferous and Permian-Cenozoic burial cementation, probably due to a lack of nucleation sites for calcite cements within completely dolomitized lithologies.

• OSTI ID: 6093860
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Vol. 75:6; ISSN AABUD; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
AUSTRALASIA
AUSTRALIA
BUILDING MATERIALS
CALCITE
CARBONATE MINERALS
CEMENTING
CEMENTS
CRYSTAL STRUCTURE
DEVELOPED COUNTRIES
DEVONIAN PERIOD
DIAGENESIS
DOLOMITE
EXPLORATION
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
GEOLOGY
MATERIALS
MICROSTRUCTURE
MINERAL RESOURCES
MINERALS
PALEOZOIC ERA
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
POROSITY
PRECIPITATION
RECRYSTALLIZATION
REEFS
RESERVOIR ROCK
RESOURCES
SEDIMENTARY BASINS
SEPARATION PROCESSES
WESTERN AUSTRALIA