The paleozoic margin of North America in west Texas and Northern Mexico
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Abstract
Analysis of gravity data from west Texas and northern Mexico delineates two large areas characterized by prominent, linear gravity highs. One feature corresponds to the Central Basin Platform of the Permian Basin, while the other corresponds to the Tascotal Uplift of the Big Bend area. Both features trend at high angles to the inferred early Paleozoic continental margin. A large mafic body is known to underlie the Central Basin Platform, while comparable gravity signatures over the Tascotal Uplift are also compatible with the presence of a large mafic body at depth. We interpret both the Central Basin Platform and the Tascotal Uplift as being related to reactivated mafic cores of failed or incipient rifts developed during establishment of the late Precambrian – early Paleozoic southern continental margin of North America.This reactivation during late Paleozoic compresional orogenic activity dominated the structural evolution of the region and must have greatly influenced sedimentation and marine circulation patterns in this area during the late Paleozoic.
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References
BREWER, J. A., R. GOOD, J. E. OLIVER, L. D. BROWN and S. KAUFMAN, 1983. COCORP profiling across the southern Oklahoma aulacogen: overthrusting of the Wichita Mountains and compression within the Anadarko Basin. Geology, 11, 109-114. DOI: https://doi.org/10.1130/0091-7613(1983)11<109:CPATSO>2.0.CO;2
DYER, R., 1986. Precambrian and Paleozoic rocks of Sierra el Carrizalillo, Chihuahua, Mexico - A preliminary report. Geol. Soc. Am. Abstr. with Prog., 18, p. 353.
EWING, T. E., 1985. Westward extension of the Devil's River uplift - Implications for the Paleozoic evolution of the southern margin of North America. Geology, 13, 433-436. DOI: https://doi.org/10.1130/0091-7613(1985)13<433:WEOTDR>2.0.CO;2
GILBERT, M. C., 1983. Timing and chemistry of igneous events associated with the southern Oklahoma aulacogen. Tectonophysics, 94, 439-455. DOI: https://doi.org/10.1016/B978-0-444-42198-2.50030-4
HANDSCHY, J. W., 1986. The geology and tectonic history of south-central Sierra del Cuervo, Chihuahua, Mexico. M. S. Thesis, U. T. EI Paso, 97 pp.
HOOVER, J. D., G. R. KELLER and J. M. HILLS, 1985. The Nellie intrusion: A basic stratiform intrusion in the Central basin platform of west Texas. Trans Am. Geophys. Un., 66, p.1136.
HOOVER, J. D. and J. M. HILLS, 1986. Preliminary characterization of the Nellie intrusion: A layered intrusive body in the west Texas basement. Geol. Soc. Am., Abs. with Prog., 18, p. 640.
KELLER, G. R., J. M. HILLS and R. DJEDDI, 1980. A regional geological and geophysical study of the Delaware basin. New Mexico Geol. Soc., 31st Guidebook, 105-111. DOI: https://doi.org/10.56577/FFC-31.105
KELLER, G. R., E. G. LIDIAK, W. J. HINZE and L, W. BRAILE, 1983. The role of rifting in the tectonic development of the midcontinent, U. S. A., Tectonophysics, 94, 391-412. DOI: https://doi.org/10.1016/B978-0-444-42198-2.50028-6
KELLER, G. R., R. A. SMITH, W. J. HINZE and C. L. V. AIKEN, 1985. Regional gravity and magnetic study of west Texas, in W. J. Hinze (ed.), The utility of regional gravity and magnetic anomaly maps. Soc. Explor. Geophys., Tulsa, Oklahoma, 198-212. DOI: https://doi.org/10.1190/1.0931830346.ch17
NICOLAS, R. L. and R. A. ROZENDAL, 1975. Subsurface positive elements within. the Ouachita foldbelt in Texas and their relation to Paleozoic cratonic margin. AAPG Bull., 59, 193-216. DOI: https://doi.org/10.1306/83D91C63-16C7-11D7-8645000102C1865D
KRUGER, J. R. and G. R. KELLER, 1986. Interpretation of crustal structure from regional gravity anomalies, Ouachita Mountains area and adjacent Gulf Coastal plain. AAPG Bull., 70, 667-689. DOI: https://doi.org/10.1306/94886330-1704-11D7-8645000102C1865D
PALMER, A. R., W. D. DeMIS, W. R. MUEHLBERGER and R. A. ROBINSON, 1984. Geological implications of Middle Cambrian boulders from the Haymond Formation Pennsylvanian in the Marathon basin, west Texas. Geology, 12, 91-94. DOI: https://doi.org/10.1130/0091-7613(1984)12<91:GIOMCB>2.0.CO;2
ROSS, C. A., 1986. Paleozoic evolution of southern margin of Permian Basin. Geol. Soc. Am. Bull., 97, 536-554. DOI: https://doi.org/10.1130/0016-7606(1986)97<536:PEOSMO>2.0.CO;2
SHURBET, D. H. and S. E. CEBULL, 1980. Tobosa-Delaware basin as an aulacogen. Texas J. Sci., 32, 17-21.
SMITH, K. J., 1986. A gravity and tectonic study of the southwestern portion of the Ouachita system. M. S. Thesis, U. T. El Paso, 99 pp.
TORRES-ROLDAN, V. and J. L. WILSON, 1986. Tectonics and facies in the Late Paleozoic Plomosas Formation of the Pedregosa basin of Chihuahua. Geol. Soc. Am., Abs. with Prog., 18, p. 774.
WALPER, J. L., 1977. Paleozoic tectonics of the southern margin of North America. Gulf Coast Assoc. Geol. Soc. Trans., 27, 230-241.