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K-Ar chronology and sulfur and strontium isotope ratios at the Questa Mine, New Mexico
Alexander William Laughlin, William Allen Rehrig and Richard Leroy Mauger
K-Ar chronology and sulfur and strontium isotope ratios at the Questa Mine, New Mexico
Economic Geology and the Bulletin of the Society of Economic Geologists (December 1969) 64 (8): 903-909
K-Ar chronology and sulfur and strontium isotope ratios at the Questa Mine, New Mexico
Economic Geology and the Bulletin of the Society of Economic Geologists (December 1969) 64 (8): 903-909
Index Terms/Descriptors
- absolute age
- age
- alkaline earth metals
- Cenozoic
- dates
- gypsum
- igneous activity
- igneous rocks
- isotopes
- K/Ar
- metals
- middle Tertiary
- mineral deposits, genesis
- mineralization
- minerals
- mines
- molybdenite
- molybdenum
- New Mexico
- North America
- Questa Mine
- ratios
- Rocky Mountains
- S-34/S-32
- Southwestern U.S.
- Sr-87/Sr-86
- stable isotopes
- strontium
- sulfates
- sulfides
- sulfur
- Taos County New Mexico
- Tertiary
- United States
- Mine Aplite
Latitude & Longitude
Abstract
K-Ar age determinations indicate that magmatism and molybdenite mineralization are indistinguishable within an experimental error of 0.8 m.y. These ages of 22.3-23.5 m.y. fall in the mid-Tertiary pulse of magmatism recognized in the southwestern United States, and agree with dates reported on other molybdenum properties in the Rocky Mountain Province. Sulfur isotopic measures suggest that at least some of the gypsum is hypogene. The Sr-87/Sr-86 ratios in a whole-rock sample of the Mine Aplite yield an initial ratio of 0.7069 similar to previously reported ratios for volcanic and intrusive rocks in the western United States.
ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 64
Serial Issue: 8
Title: K-Ar chronology and sulfur and strontium isotope ratios at the Questa Mine, New Mexico
Pages: 903-909
Published: 196912
Text Language: English
Publisher: Economic Geology Publishing Company,
Lancaster, PA,
United States
Accession Number: 1969-038253
Categories: Geochronology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus., table
N36°40'60" - N36°40'60", W105°30'00" - W105°30'00"
N32°00'00" - N65°00'00", W155°00'00" - W103°00'00"
N26°00'00" - N37°00'00", W114°45'00" - W93°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1969
