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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 53 (1969)

Issue: 9. (September)

First Page: 2032

Last Page: 2032

Title: Gravity Survey of Florida Bay and Lower Keys: ABSTRACT

Author(s): Mahlon M. Ball, Woodson R. Oglesby

Article Type: Meeting abstract

Abstract:

A Bouguer gravity map of the southern part of Florida, including stations ranging from about 24° to 26° N lat., and 80° to 83° W long., is presented.

The salient features depicted are: (1) the western rim of the South Florida basin, with gravity values increasing toward the basin's center; (2) a large Previous HitminimumNext Hit anomaly centered near Homestead in Dade County; (3) an elongate gravity Previous HitminimumNext Hit extending from the area of Barnes Sound southwestward over most of Florida Bay; and (4) a Previous HitminimumNext Hit indicated by two gravity readings obtained in the Marquesas Keys, suggesting a need for further investigation.

Examination of cuttings and cores recovered from oil tests drilled on or near the Previous HitminimumNext Hit anomalies indicates that if salt is present, it is deep seated (below 11,000 ft). Wells near Homestead show that the area is structurally high at levels ranging from Eocene to Lower Cretaceous. The preponderance of anhydrite, dolomite, and dense aphanitic limestone in more than 4,000 ft of Lower Cretaceous rocks penetrated in the area suggests that the average density of this section may exceed that of the underlying basement. If true, a Previous HitminimumTop anomaly would occur over an uplifted or topographically high area of the basement.

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Copyright 1997 American Association of Petroleum Geologists