Higher order cycles, inferred chronostratigraphy, and impact of multiple lowstand systems tracts on hydrocarbon exploration, Pletmos basin, southern offshore, South Africa
Development of 67 middle Valanginian to middle Campanian cyclic depositional sequences is interpreted to be a response to the interplay of unique tectonics and higher order eustatic sea level cycles capable of imposing type 1 unconformities. Direct correlation of 16 sequences, within available paleontological age constraints, with Exxon's global third-order cycles encompasses the remaining 51 sequences, which are inferred to be fourth-order and fifth-order cycles. These unconformity bound sequences were grouped into genetic megasequences bound by major type 1 unconformities (third-order or fourth-order falls at the trough of a third-order cycle) typically displaying evidence of extensive erosion of thick highstand systems tracts.
- Research Organization:
- Soekor Ltd., Parow (South Africa)
- OSTI ID:
- 6128608
- Report Number(s):
- CONF-890404-
- Journal Information:
- AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States), Vol. 73:3; Conference: AAPG annual convention with DPA/EMD Divisions and SEPM, San Antonio, TX, USA, 23 Apr 1989
- Country of Publication:
- United States
- Language:
- English
Similar Records
Type 1 and Type 2 unconformity development in response to differential subsidence rates and eustatic sea level fluctuations, Pletmos basin, offshore South Africa
Recognition of seismic facies, genetic elements, and depositional environments in lowstand system tracts, Pletmos basin, offshore South Africa