Late Proterozoic and Silurian alkaline plutons within the southeastern New England Avalon zone

Authors

O. D. Hermes, University of Rhode Island
R. E. Zartman, University of Rhode Island

Document Type

Article

Date of Original Version

1-1-1992

Abstract

Zircon separates from the Franklin and Dartmouth plutons demonstrate that two previously unrecognized periods of alkaline magmatism occurred. The Franklin pluton yields an age of 417±6 Ma (Late Silurian), whereas the Dartmouth pluton is Late Proterozoic (595±5 Ma) and markedly older than the other plutons of alkaline affinity. The new ages further emphasize the episodic nature and long-term duration of such alkaline igneous events within the southeastern New England Avalon zone. -from Authors

Publication Title, e.g., Journal

Journal of Geology

Volume

100

Issue

4

Citation/Publisher Attribution

Hermes, O. D., and R. E. Zartman. "Late Proterozoic and Silurian alkaline plutons within the southeastern New England Avalon zone." Journal of Geology 100, 4 (1992). doi: 10.1086/629599.