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40AR/39AR DATA, RAY MOUNTAINS AREA, BETTLES QUADRANGLE, ALASKA.
- Source :
-
Raw Data File (Alaska Division of Geological & Geophysical Surveys) . 2014, Issue 19, p1-12. 12p. - Publication Year :
- 2014
-
Abstract
- 40Ar/39Ar analyses were performed on igneous rocks from the Ray Mountains area of west-central Alaska. The plutonic samples have ages from about 89 Ma to 109 Ma, while the volcanic samples show ranges from about 30 Ma to 64 Ma. The three volcanic samples fall into two age groups: the younger sample, a basalt, has an age of about 30 Ma, while the two older, rhyolitic samples fall between 58 Ma and 64 Ma. [ABSTRACT FROM AUTHOR]
- Subjects :
- *IGNEOUS rocks
*GEOCHRONOMETRY
*VOLCANIC ash, tuff, etc.
*IGNEOUS intrusions
*BASALT
Subjects
Details
- Language :
- English
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- Raw Data File (Alaska Division of Geological & Geophysical Surveys)
- Publication Type :
- Report
- Accession number :
- 98935048
- Full Text :
- https://doi.org/10.14509/29124