Geophysical and geochronological constraints on the extent and age of mafic intrusions in the basement of west Texas and eastern New Mexico

Keller, G. Randy; Hills, John M.; Baker, Mark R.; Wallin, E. Timothy

doi:10.1130/0091-7613(1989)017<1049:gagcot>2.3.co;2

Cited by 52 publications

(24 citation statements)

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“…The Mazatzal and Central Plains orogenic terranes may extend southward under the western granite -rhyolite province (WGRP) (Bickford et al 1986). Copeland and Bowring (1988), Davis and Sutcliffe (1985), Denison and Heatherington (1969), Goldich et al (1966), Keller et al (1989), Muehlberger et al (1966), Palmer and Davis (1987), Roths (1993), Wasserburg et al (1962), Sims and Peterman (1986), Karlstrom (1989), Bickford (1988), Bickford and Lewis (1979), Walker (1992), Roths (1993), and Elston and Clough (1993). material ( Fig.…”

Section: Pre-keweenawan Geologic Settingmentioning

confidence: 97%

“…These rocks are found in the Central basin platform (Keller et al 1989), Pajarito Mountain (Bowsher 1991), the Franklin Mountains (Denison and Hetherington 1969;Copeland and Bowring 1988), and the Van Horn uplift (Roths 1993).…”

Section: Igneous Activity In Other Regionsmentioning

confidence: 98%

“…It penetrated 1400 m of Phanerozoic sedimentary rocks and 4460 m of Precambrian rocks, providing a deep penetration of the Precambrian basement. The basement samples from this well are mafic and ultramafic rocks that include anorthosite, norite, and gabbro (Keller et al 1989). U-Pb zircon and titanite ages were determined on three samples from this well.…”

Section: Central Basin Platformmentioning

confidence: 99%

“…1 Keliehor, Parmer Co., Tex. Keller et al 1989Keller et al 1989Keller et al 1989Wasserburg et al 1962Muehlberger et al 1966Muehlberger et al 1966Muehlberger et al 1966Muehlberger et al 1966Wasserburg et al 1962Wasserburg et al 1962Roths 1993Wasserburg et al 1962Wasserburg et al 1962Roths 1993Norman et al 1987 Davis and Sutcliffe 1985…”

Section: Debaca-swisher Terranementioning

confidence: 99%

“…1 Nellie well on the CBP. This well was centered on the southernmost gravity high of the CBP (Keller et al 1989). It penetrated 1400 m of Phanerozoic sedimentary rocks and 4460 m of Precambrian rocks, providing a deep penetration of the Precambrian basement.…”

Section: Central Basin Platformmentioning

confidence: 99%

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Possible extension of the Midcontinent Rift in west Texas and eastern New Mexico

Adams¹,

Keller²

1994

Can. J. Earth Sci.

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The Midcontinent Rift System forms one of the most prominent gravity features in North America. The recognized geophysical anomaly extends in an arc from southern Oklahoma to Lake Superior and then into southern Michigan. The Midcontinent Rift System was active between 1185–1010 Ma, as indicated in the Lake Superior region by age determinations on intrusive igneous rocks. We suggest that the period of formation of the Midcontinent Rift was also a time of extensive igneous activity in Texas and New Mexico. This activity is represented by intrusions beneath the Central basin platform (Texas and New Mexico), intrusions which crop out at the Pajarito Mountain in the Sacramento Mountains (New Mexico), a basaltic debris flow in the Franklin Mountains (Texas), basalt flows at Van Horn (Texas), and the Crosbyton geophysical anomaly (east of Lubbock, Texas). These bodies and other bodies located by geophysical anomalies and wells drilled into mafic Precambrian rocks may be related to the Midcontinent Rift System. Alternatively this magmatism could be related to Grenville age tectonics in Texas. The mafic igneous rocks in this area form a 530 km diameter Middle Proterozoic igneous province, which formed between 1070 and 1220 Ma. Comparison of the Midcontinent Rift System and its extensions proposed here with the Mesozoic and Cenozoic African rift systems indicates that these features are of comparable scale and complexity.

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