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Esmond-Dedham Terrane

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Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE245-p155
... to the Proterozoic- to Devonian-aged granitic basement of the Esmond-Dedham terrane. Of particular interest is a newly recognized unit of slightly deformed ~600-Ma, alkalic granite plus diorite, in which contact relations imply comingling of magmas of contrasting composition. In contrast, Group II consists...
Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE245-p13
... With the recognition of the Hope Valley shear zone (HVSZ) as a terrane boundary, the Esmond-Dedham terrane (EDT) was subdivided, and the western division was named the Hope Valley terrane (HVT). The oldest rocks of the HVT consist of schist, gneiss and quartzite (Plainfield Formation...
Series: GSA Special Papers
Published: 01 January 1989
DOI: 10.1130/SPE230-p193
...–Dedham and the Hope Valley. These terranes appear to have had differing interactions with rocks derived from the North American continent, with major tectonic modifications and/or transport occurring in late Paleozoic time. The EsmondDedham terrane lacks any clear previous relationships to other rocks...
Journal Article
Journal: GSA Bulletin
Published: 01 March 2012
GSA Bulletin (2012) 124 (3-4): 517-531.
... in the Newfoundland Avalon zone and Mira terrane of Cape Breton Island, but which overlap values in the Caledonia terrane, New Brunswick, and the Cobequid-Antigonish Highlands in northern mainland Nova Scotia. Nd evolution lines and 1.2–0.9 Ga depleted mantle model ages for the Dedham, Esmond, and Westwood granites...
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Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE253-p427
...-Central Maine, (6) Tatnic Hill-Nashoba, and (7) Avalonia. Avalonia is further divided into three subzones, Hope Valley, Esmond-Dedham, and Penobscot Bay, which themselves may have had distinct origins and assembly histories. The boundaries between these zones are faults in most cases, some of which may...
Journal Article
Journal: GSA Bulletin
Published: 01 August 1988
GSA Bulletin (1988) 100 (8): 1168-1180.
...) Bronson Hill, (5) Kearsarge-Central Maine, (6) Tatnic Hill-Nashoba, and (7) Avalonia. Avalonia is further divided into three subzones, Hope Valley, Esmond-Dedham, and Penobscot Bay, which themselves may have had distinct origins and assembly histories. The boundaries between these zones are faults in most...
Series: GSA Memoirs
Published: 01 September 2010
DOI: 10.1130/2010.1206(11)
... setting. New crystallization ages from the same suite are 609.5 ± 1.1 Ma, 609.1 ± 1.1 Ma, and 608.9 ± 1.2 Ma for units of the Dedham Granite; 606.3 ± 1.2 Ma for the Milford Granite; 604.4 ± 1.2 Ma for the Fall River Granite; and 599 ± 2 Ma for the Esmond Granite (2σ errors, including internal and external...
Journal Article
Journal: GSA Bulletin
Published: 01 May 2007
GSA Bulletin (2007) 119 (5-6): 681-696.
... in the Squantum Member of the Roxbury Conglomerate (maximum age of 593 Ma) overlying the volcanic sequence. The Lynn-Mattapan results indicate that southeastern New England occupied a mid-latitude position at ca. 595 Ma, similar to those reported from Avalonian terranes in maritime Canada. The most likely peri...
FIGURES | View All (7)
Journal Article
Published: 22 February 2012
Canadian Journal of Earth Sciences (2012) 49 (3): 533-546.
... . Ages of detrital zircons from the Blackstone Group, Rhode Island: insights into the history of the Esmond-Dedham terrane prior to 620 Ma. Geological Society of America, Abstracts with Programs , 28 : 77 Murphy J.B. 2002 . Geochemistry of the Neoproterozoic metasedimentary Gamble Brook...