Ames Hole Oklahoma: Impact-formed petroleum reservoirs
- Arizona State Univ., Tempe, AZ (United States)
Ames Hole is a 16 km wide circular subsurface structure centered at 361{degrees}5{prime}north, 098{degrees}12{prime}west in Major County, northern Oklahoma. An impact origin is confirmed by the presence of shock metamorphosed mineral grains and impact melt rocks recovered from drill cores and by a negative Bouger gravity anomaly over its center. Buried about three km deep, the structure is composed of shattered, central zone of uplifted Precambrian granite and Cambrian-Ordovician Arbuckle dolomite surrounded by two concentric rims of fractured and brecciated Arbuckle dolomite. The crater is filled with, and covered by, marine sediments of the middle Ordovician Oil Creek shale. The crater was formed during Ordovician time in a shallow sea on the northern shelf of the Anadarko Basin. Restricted water circulation and anoxic conditions within the deep crater promoted precipitation of plankton-rich sediments. This Oil Creek shale became both the source and the sealing rocks for hydrocarbons which migrated into underlying porous target rocks fractured during the impact event. About one hundred wells within the area underlain by the Ames Hole astroblem presently produce nearly half of Oklahoma`s oil and gas.
- OSTI ID:
- 425730
- Report Number(s):
- CONF-960527-; TRN: 96:004994-0368
- Resource Relation:
- Conference: Annual convention of the American Association of Petroleum Geologists, Inc. and the Society for Sedimentary Geology: global exploration and geotechnology, San Diego, CA (United States), 19-22 May 1996; Other Information: PBD: 1996; Related Information: Is Part Of 1996 AAPG annual convention. Volume 5; PB: 231 p.
- Country of Publication:
- United States
- Language:
- English
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