Item Number: OFS94-12

INTRODUCTION: The Illinois Basin, which covers about 110,000 square miles in Illinois, Indiana, and Kentucky, contains a wealth of energy and industrial- and metallic- mineral resources. These resources are an important constituent of the economies of states located in the basin. Because new deposits of these resources will be needed to sustain and enhance the economies of this region, there is a continued need to further our understanding of the geology of the basin and how it relates to energy and mineral resources and to environmental problems. In 1989, the Illinois Basin Consortium (IBC), consisting of the Illinois, Indiana and Kentucky state geological surveys, was formed to advance the understanding of the geology of the Illinois Basin, by coordinating the various state survey studies, and by utilizing the surveys' collective expertise. The IBC and the U.S. Geological Survey entered into a collaborative effort in 1990 to integrate their geochemical and fluid flow expertise with ongoing state surveys' research. The IBC (surveys) continued to study problems related to the structural formation of the basin, sedimentology of strata filling the basin, and formation and distribution of hydrocarbon, and industrial- and metallic- mineral resources. The USGS focused on aspects of basin-scale fluid flow and its link to regional patters of diagenesis, sedimentary metal deposits, and hydrocarbon accumulations. The ultimate goal of the cooperative program is to provide decision makers with geological information for current and future resource and environmental assessment. Many new studies were initiated under the joint IBC-USGS agreement, including the acquisition and interpretation of regional seismic data not formerly available to all parties. These data are providing valuable new insights into the tectonic history of the basin and on the role of tectonism on sedimentation and formation of local structures that could be important new hydrocarbon exploration targets in the structurally complex, deep part of the basin. The 42 abstracts in this volume represent results of some of the basin studies and were presented at this workshop. The workshop, which is the culmination of the 5-year cooperative research effort between the IBC and USGS, is a means for transferring information gained from this effort to the public. The workshop was also intended to provide a forum for those concerned with the geology, energy and mineral resources, geologic hazards, and geology-related environmental problems in the basin to discuss future directions for research and possible cooperative investigations.

Ridgley, J. L., Drahovzal, J. A., Keith, B. , Kolata, D. R. 1994, Proceedings of the Illinois Basin energy and mineral resources workshop. September 12-13: Indiana Geological Survey Open-File Study 94-12, 46 p.

Notes: Publications in the Indiana Geological Survey Open-File series have been inconsistently named using a variety of series titles including "Open-File Report," "Open-File Map," and "Open-File Study." Prior to 1994, a publication in this series was generally referred to as an "Open-File Report" (but not always). To help reduce confusion created by these inconsistencies, the IGS now refers to every publication in the Open-File series as an "Open-File Study." To be entirely correct in writing a bibliographic reference for a publication, one should use the series name and number that appears on the publication itself.

Sponsored by the Illinois Basin Consortium and the United States Geological Survey.

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Keywords: Illinois Basin, energy resources, mineral resources

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