Model of the midcontinent rift system in northeastern Kansas

Journal Article · Thu Feb 28 23:00:00 EST 1991 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1991)019<0277:MOTMRS>2.3.CO;2· OSTI ID:5524255

Woelk, T S; Hinze, W J ^[1]

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1. Purdue Univ., West Lafayette, IN (USA)

Recent drilling of the midcontinent rift system in northeastern Kansas reveals a transposed Keweenawan stratigraphy of mafic volcanic rocks overlying thick clastic sedimentary rocks. A reprocessed version of COCORP Kansas Line 1 indicates that the drillhole penetrated a series of west-dipping reflectors associated with a reverse fault bounding the east side of the rift basin. Reanalysis of the original COCORP line also reveals a west-bounding reverse fault and evidence of crustal thickening. This information is integrated with gravity and magnetic data to define a model of the rift in northeastern Kansas. The model, consisting of an asymmetric basin bounded by reverse faults with thickened crust beaneath the rift, is similar to models proposed for northern segments of the rift system, and argues for homogeneity in the structural style and tectonic evolution along the length of the rift.

• OSTI ID: 5524255
• Journal Information: Geology; (USA), Journal Name: Geology; (USA) Vol. 19:3; ISSN GLGYB; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
BOREHOLES
CAVITIES
CONTINENTAL CRUST
DATA ANALYSIS
DEVELOPED COUNTRIES
DRILLING
EARTH CRUST
FEDERAL REGION VII
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
GEOLOGY
GEOPHYSICAL SURVEYS
GRAVITY SURVEYS
IGNEOUS ROCKS
KANSAS
MAGNETIC SURVEYS
NORTH AMERICA
RIFT ZONES
ROCKS
SEDIMENTARY ROCKS
SEISMIC SURVEYS
STRATIGRAPHY
SURVEYS
TECTONICS
USA
VOLCANIC ROCKS