Tectonics, eustasy, and sequence stratigraphy - The Middle Pennsylvanian-Wolfcampian of the Permian basin
- Independent Consultant, Midland, TX (United States)
The depositional patterns of sedimentary rocks are controlled by the interaction of tectonics, eustasy, and sediment supply. Tectonics and eustasy combine to cause relative changes of sea level that control the accommodation space for sediments. Sediment supply controls how much of the accommodation space is filled. Tectonics has the greatest effect on accommodation. Long-term basin fill histories are interpreted as first-order tectonic events. Second-order tectonic events are initiated by increase in the rate of subsidence that progressively decay and may culminate in a period of uplift or structural growth. Three second-order tectonic events characterize the middle-late Paleozoic history of the Permian basin. These events occur over tens of millions of years and are (1) Givetian-Meramecian, (2) Chesterian-Desmoinesian, and (3) Missourian-Guadalupian. Sediment response to these tectonic events include initial backstepping carbonate platform deposition, followed by deepening and starvation of the basin areas resulting in black shale deposition. Eustasy controls the rate of relative sea level change and is the major controlling factor on the timing of stratigraphic discontinuities. The discontinuities bound sequences and subdivide them into systems tracts. The Middle Pennsylvanian-Wolfcampian of the Permian basin can be subdivided into 19-21 third-order sequences (1-5-m.y. duration) and include six Desmoinesian, four Missourian, five to six Virgilian, and four to five Wolfcampian cycles. The cyclothems of the mid-continent represent higher order depositional sequences that stack in an orderly fashion to comprise the systems tracts of the third-order sequences.
- OSTI ID:
- 7003734
- Report Number(s):
- CONF-9204139--
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (United States), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Vol. 76:4; ISSN AABUD; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
Similar Records
Roles of provenance, eustasy, and paleoclimates in determining diagenetic alterations in Pennsylvanian sandstones, Forest City basin mid-continent, U. S. A
The significance of employing depth-related community replacement models in Carboniferous-Permian sequence stratigraphy
Related Subjects
020200 -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580000* -- Geosciences
CARBONIFEROUS PERIOD
DEPOSITION
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGY
LEVELS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PALEOZOIC ERA
PERMIAN BASIN
PERMIAN PERIOD
PETROLEUM DEPOSITS
RESOURCES
SEA LEVEL
STRATIGRAPHY
TECTONICS