The age and cooling history of the chain of ponds and big island pond plutons and the spider lake granite, west-central Maine and Quebec

58Citations
Citations of this article
12Readers
Mendeley users who have this article in their library.

Abstract

40Ar/39Ar release spectrum ages have been determined for hornblende, biotite, and K-feldspar from the Chain of Ponds pluton (CPP), Spider Lake Granite (SLG), and Big Island Pond pluton (BIPP) west-central Maine and Quebec. Mean plateau ages of 373.3 ± 2.0, 367.6 ± 1.3, and 367.7 ± 1.3 Ma for hornblendes from the CPP, SLG, and BIPP respectively are interpreted to be intrusive ages for these plutons. A best estimate biotite age of 371.5 ± 2.7 Ma for the CPP is reported. The K-feldspars from the CPP exhibit radiogenic 40Ar loss profiles resultant from an ~170 Ma thermal disturbance and have plateau or terminal ages varying from ~312 to 365 Ma. A three dimensional conductive cooling model for the CPP suggest that rapid cooling to ambient conditions occurred within ~3 Ma of intrusion. This model corresponds well with the rapid cooling suggested by the essentially concordant hornblende and biotite ages. -Authors

Cite

CITATION STYLE

APA

Heizler, M. T., Lux, D. R., & Decker, E. R. (1988). The age and cooling history of the chain of ponds and big island pond plutons and the spider lake granite, west-central Maine and Quebec. American Journal of Science, 288(9), 925–952. https://doi.org/10.2475/ajs.288.9.925

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free