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The AAPG/Datapages Combined Publications Database
Oklahoma City Geological Society
Abstract
Depositional Environments and Diagenesis of Upper Pennsylvanian Marchand Sandstones on South, East and Northeast Flanks of the Anadarko Basin
ABSTRACT
The Marchand sandstones are thought to be marine sands deposited on the slope or ramp of the Anadarko Basin. Evidence for this interpretation is the somewhat unique characteristics of the Marchand sandstones as seen in core study, apparent depositional topography related to the sandstones, and the relationship of the Marchand with its lateral equivalents (Layton Sandstone and Coffeyville Formation).
During Marchand deposition, the Anadarko Basin is thought to have consisted of a broad shallow shelf, which was a carbonate platform to the north and a deltaic platform to the east, together with a less well defined slope-basinal area. The depositional slope on the shelf-slope transition was 0.5 to 1 degree. Maximum water depths for the central part of the basin were approximately 400 to 500 feet. Water depths in that area of Marchand deposition was probably 200 to 300 feet.
Based on composition, the major source area for the Marchand sandstones was probably the Ouchita Uplift. However, distribution and composition of the Marchand in the Cement Field area suggests the Wichita Uplift was, locally, an important source area for the extreme southern part of the study region. Contributions from the distant craton or Appalachian region cannot be disproved.
Diagenesis of the Marchand sandstones is thought to have occurred in four main stages. Development of secondary porosity is, from an economic standpoint, the most important of these phases.
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