40Ar/39Ar data from rocks collected in 2013 in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska
Description
This DGGS report presents 40Ar/39Ar age dating results from selected mafic to intermediate intrusions encountered during a geological and geochemical resource assessment project in the Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles. Three intrusions returned mid-Cretaceous crystallization ages, while one olivine gabbro returned a Late Triassic crystallization age. Two altered or metamorphosed samples yielded Late Jurassic and Early Cretaceous ages. Analyses were performed by the University of Alaska Fairbanks Geochronology Laboratory, and results were reported by Paul Layer and Jeff Benowitz. Products included in this data release are: a summary of sample collection method; the laboratory report, analytical data tables and associated metadata; and plots of the 40Ar/39Ar age spectra, Ca/K ratios, and Cl/K ratios. All components of this data release are available on the DGGS website doi:10.14509/29119 at no charge.
Resources
Name
Format
Description
Link
0
http://dx.doi.org/10.14509/27181
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CSDGM IMPORT ERROR: No digtinfo/formcont
http://dx.doi.org/10.14509/29119
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http://dx.doi.org/10.14509/29119
Tags
platinum group elements
40ar/39ar
sample location
amphitheater mountains
geochronology
cretaceous
mineral resources
mineral assessment
mineral deposit
analyses
healy quadrangle
bedrock
geology
bedrock geology
talkeetna mountains quadrangle
skarn
jurassic
ar-ar
analyses and sampling
mount hayes quadrangle
wrangellia terrane
late triassic
metamorphism
lab methods
strategic and critical minerals assessment project