New determinations of the age of the Bob Ingersoll pegmatite, Keystone S. Dakota

Details New determinations of the age of the Bob Ingersoll pegmatite, Keystone S. Dakota New determinations of the age of the Bob Ingersoll pegmatite, Keystone S. Dakota

Jun 1956

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1956gecoa...9..292w&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 9, Issue 5-6, pp.292-297

Physics

5

Scientific paper

Age determinations have been made on various minerals from the Bob Ingersoll pit No. 1. The uranium-lead ages agree at 1600 m.y., Rb-Sr ages of microcline, muscovite and lepidolite are all about 2050 m.y., probably indicating that the currently accepted Rb decay-constant is incorrect. K-A ages of the micas are in fairly good agreement with U-Pb ages when a K 40 branching ratio of 0.100 is used. The K-A age of the microcline is definitely lower, probably indicating loss of argon from this mineral.

Affiliated with

Also associated with

No associations

Rating

New determinations of the age of the Bob Ingersoll pegmatite, Keystone S. Dakota does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with New determinations of the age of the Bob Ingersoll pegmatite, Keystone S. Dakota, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New determinations of the age of the Bob Ingersoll pegmatite, Keystone S. Dakota will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1557208