New Mexico Bureau of Geology & Mineral Resources

Isochron/West

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Isochron/West was published at irregular intervals from 1971 to 1996. The journal was patterned after the journal Radiocarbon and covered isotopic age-dating (except carbon-14) on rocks and minerals from the Western Hemisphere. Initially, the geographic scope of papers was restricted to the western half of the United States, but was later expanded. The journal was sponsored and staffed by the New Mexico Bureau of Mines (now Geology) & Mineral Resources and the Nevada Bureau of Mines & Geology.

Papers from all back-issues are accessible for free in PDF format.

Should you wish to publish a geoscience paper of regional interest on any topic please consider our journal New Mexico Geology.

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Issue: 48, 1987

K-Ar thermochronology of a Mesozoic plutonic complex, Avawatz mountains, southeastern California (1.14 MB PDF), pp. 3-8.
— J.E. Spencer

Late Miocene hydrothermal activity at the Willard and Scossa mining districts, Pershing county, northwestern Nevada (445 KB PDF), pp. 9-10.
— D.C. Noble, E.H. McKee, and L.T. Larson

New K-Ar ages of hydrothermal minerals and igneous rocks from the western Virginia Range, Washoe and Storey counties, Nevada (848 KB PDF), pp. 11-16.
— P.G. Vikre and E.H. McKee

K-Ar ages of granitic plutonism and hydrothermal alteration in the western part of the Tonopah 1x2 sheet, Nevada (458 KB PDF), pp. 17-18.
— D.A John and E.H. McKee

New K-Ar analyses of basalts from southern Califronia and central New Mexico (394 KB PDF), pp. 19-20.
— B.D. Leavy and M. Shafiqullah

A new Rb/Sr isochron date for the Hells Mesa Tuff, Socorro county, New Mexico (280 KB PDF), pp. 21-22.
— T.L. Eggleston and D.I. Norman

New isotopic dates for the Taylor Creek rhyolite and associated rocks in the Black Range of New Mexico (561 KB PDF), pp. 23-25.
— T.L. Eggleston and D.I. Norman

Isochron/West, A Bulletin of Isotopic Geochronology, pp. 1-25.
— John H. Schilling, Dick Meeuwig, Rayetta Buckley, and Deborah A. Shaw, [eds.]