Rubidium-strontium geochronology of a transect of the Chilean Andes between latitudes 45° and 46° S

Details Rubidium-strontium geochronology of a transect of the Chilean Andes between latitudes 45° and 46° S Rubidium-strontium geochronology of a transect of the Chilean Andes between latitudes 45° and 46° S

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978e%26psl..41...60h&link_type=abstract

Earth and Planetary Science Letters, Volume 41, Issue 1, p. 60-66.

Computer Science

4

Scientific paper

Plutons of quartz diorite to adamellite composition give Rb-Sr total-rock and biotite calculated ages of 12 to 176 m.y. along a transect of the Chilean Andes between 45° and 46° S. Miocene biotite dates of quartz diorite from the Puerto Aisen area are interpreted as minimum ages related to probable local structural deformation (faulting). Along a north-south traverse of the Argentine Andes between 40° and 44° S, plutons of similar composition to the Chilean Andes give K-Ar and Rb-Sr total-rock and mineral dates which range from late Paleozoic to Cretaceous. No systematic unidirectional migration of the radiometric ages is observed.

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