Illinois Basin Structure
The Illinois Basin lies across Illinois, Indiana, and Kentucky, and it has a oval like structural depression in southeastern Illinois. The Illinois Basin is classified as an intracratonic basin (Bois and Pelet 1982). The Illinois Basin began as a rift complex which eventually failed, the New Madrid fault is associated with this rifting (Hasenmueller and Comer 1994). The depositional thickness of the New Albany Shale was strongly affected by the regional down-warping in southeastern Illinois (Lineback 1980). The Illinois basin is separated from the Michigan basin by the Kankakee arch, which is located primarily in Indiana (Nelson 1995). To the South East lies the Cincinnati arch (Nelson 1995). In central and southern Illinois the principle structural feature is the Eastern Interior basin, which is a geosyncline (Hasenmueller and Comer 1994). The LaSalle anticlinal belt stretches for over 200 miles from above LaSalle Illinois down past the eastern edge of the state of Illinois (Hasenmueller and Comer 1994). Faulting can be found throughout the basin and includes the New Madrid Complex (Hasenmueller and Comer 1994). Within the New Madrid Complex is the Rough Creek Graben, which extends into the Reelfoot rift (Hasenmueller and Comer 1994). The Fluorspar Area fault Complex contains the Tolu Arch that strikes northwest (Buschbach and Kolata 1991). The interpretation of the fault type has some discrepancies (Trace 1974). Some interpretations show it as a high-angle normal fault, while others interpret it as a high-angle reverse and strike slip (Trace 1974). The Cottage Grove Fault System is located in Southern Illinois and has many different structures associated with it that include normal, reverse, strike-s...
... middle of paper ...
..., V. 52, P. 1291-1303.
Lineback, J. A., 1980, Coordinated study of the Devonian black shale in the Illinois Basin: Illinois, Indiana, and western Kentucky: Morgantown Energy Technology Center, U.S. Department of Energy, Contract/Grant Report 1981-1, 36 p.
Lineback, J. A., 1966, Deep-water sediments adjacent to the Borden Siltstone (Mississippian) delta in southern Illinois: Champaign, Illinois State Geological Survey, Circular 401, 48 p.
Nelson. N., 1995, Structural features in Illinois: Illinois State Geological Survey, Bulletin 100.
Stevenson, D. L., and Dickerson, D. R., 1969, Organic geochemistry of the New Albany Shale in Illinois: Illinois State Geological Survey Illinois Petroleum 90, p. 11.
Werner-Zwanziger, U., 2005, Thermal Maturity of type II kerogen from the New Albany Shale ased by 13C CP/MAS NMR: Solid State Nuclear Magnetic Resonance, v. 27 p. 140-148