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Dedham Granite

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Journal Article
Journal: GSA Bulletin
Published: 01 May 1984
GSA Bulletin (1984) 95 (5): 522-539.
... such as inherited zircon and metamorphic overprinting can be better evaluated. With the above-mentioned qualifications in mind, igneous rock ages summarized according to structural province are as follows. (I) Milford-Dedham zone: (a) late Proterozoic Z—Dedham Granite and related rocks, 630 ± 15 m.y., 595 ± 15 m.y...
Journal Article
Journal: GSA Bulletin
Published: 01 March 2012
GSA Bulletin (2012) 124 (3-4): 517-531.
... of the Westboro Formation intruded by the Dedham Granite north of Boston (Massachusetts). An Avalonia-Baltica connection is also consistent with available paleomagnetic data placing both areas at moderate south paleolatitude between ca. 615 Ma and ca. 575 Ma during Ediacaran deposition of their respective...
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Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE245-p113
... Late Proterozoic igneous rocks in the Boston-Avalon zone of eastern Massachusetts are dominated by voluminous calc-alkalic intrusives and extrusives that yield radiometric ages between 600 and 650 Ma. This “main phase” Avalonian volcano-plutonic series, which includes the Dedham Granite...
Journal Article
Published: 17 March 2014
Canadian Journal of Earth Sciences (2014) 51 (5): 485-499.
... 8‰ located across the orogen. Oxygen and Hf isotopic compositions in zircons from three high δ 18 O plutons, including an Early Devonian muscovite granite from Buckport, Maine, the Ediacaran Dedham Granite from eastern Massachusetts, and the Mesoproterozoic Tyringham Gneiss of western Massachusetts...
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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...
Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE245-p75
... The Boston Basin is a late Precambrian structural and depositional basin that is thought to be a fragment of Avalon terrane. Basement rocks consist of the calc-alkaline Dedham Granite and a bimodal volcanic assemblage that is, in part, interbedded with basal sedimentary rocks of the Boston Bay...
Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE245-p133
... in the Cape Ann zone is probably associated with the Cape Ann Granite. Dacite and andesitic dikes in the Danvers-Dedham zone appear to be late Proterozoic to early Paleozoic in age. Most of the remaining NW-trending (and E-W–trending) dolerite dikes are believed to be middle to late Paleozoic. The dominant...
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...
Image
Concordia diagrams, analyzed by SIMS. The analyzed zircon grains are from (...
Published: 17 March 2014
Fig. 4. Concordia diagrams, analyzed by SIMS. The analyzed zircon grains are from ( a ) Dedham Granite (Sample No. 46) and ( b ) Tyringham Gneiss (Sample No. 55) from Massachusetts; and ( c ) the granite at Yale Farm (Sample No. 32) from Connecticut. Data-point error (data-pt errs) ellipses
Image
Scanning electron microscope (SEM) – cathodoluminescence (CL) images of zir...
Published: 17 March 2014
Fig. 2. Scanning electron microscope (SEM) – cathodoluminescence (CL) images of zircons from New England, USA. ( a ) Dedham Granite (Sample No. 46), Massachusetts; ( b ) Hope Valley Plagioclase Gneiss (Sample No. 20), Connecticut; ( c ) Quincy Granite (Sample No. 40), Massachusetts; ( d
Journal Article
Published: 26 August 2008
Canadian Journal of Earth Sciences (2008) 45 (7): 815-825.
... ca. 600 Ma MT94-1 Dedham granite Granite 609.48±0.17 7.7 BOS-16A Dedham granite Granite 607±4 7.7 WE1-5 Dedham granite Granite 608±1.4 6.1 MT06-114A Dedham granite Granite (609±0.14) 1.2 KK5 Westwood granite Granite 599±1 1.5 KK6 Unnamed quartz diorite...
FIGURES
Series: Geological Society, London, Memoirs
Published: 01 January 2011
DOI: 10.1144/M36.43
EISBN: 9781862394117
... of the granitoids (Dedham Granite) and felsic volcanic rocks (Mattapan-Lynn Volcanic Complex) ( Hermes et al. 1981 ) that underlie the strata of the Boston Bay Group. The Boston Bay Group was affected by subsequent Alleghenian deformation in the form of broad east–NE striking thrust faults and NE-trending folds...
FIGURES
Journal Article
Journal: GSA Bulletin
Published: 01 May 2007
GSA Bulletin (2007) 119 (5-6): 681-696.
... ). Intrusive activity in the greater Boston area (Fig. 1) is represented by the widespread ca. 610 Ma Dedham Granite ( Hepburn et al., 1993 ; Ault et al., 2004 ) and the localized, ca. 599 Ma Westwood Granite ( Thompson et al., 1996 ). Surface eruptions are recorded in dominantly siliceous volcanic rocks...
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Journal Article
Journal: Geosphere
Published: 06 February 2019
Geosphere (2019) 15 (2): 357-381.
... Formation comprise primarily light gray quartzites that are the oldest rocks in the Boston Avalon terrane. U-Pb detrital zircon ages constrain the maximum age of the Westboro Formation to 912 Ma; its minimum age is constrained by the intrusion of the Dedham granite (ca. 609–606 Ma; Thompson et al., 2012...
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Journal Article
Journal: AAPG Bulletin
Published: 01 July 1975
AAPG Bulletin (1975) 59 (7): 1041-1072.
... to 6.2 km/sec. Compressional wave velocities determined for the Dedham granodiorite of southeastern Massachusetts, which has a Precambrian age of 560 m.y. ( Fairbairn et al, 1967 ), are within the 5.1- to 6.2-km/sec range ( Birch, 1960 ). Rock units sampled in the central gulf are granitic in composition...
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Journal Article
Published: 01 January 2001
Journal of Paleontology (2001) 75 (1): 116-135.
... at several localities south of Boston. These localities of the Braintree Slate ( Shaler, 1871 ) do not show the lower and upper contacts of the unit, and are intruded by or lie in fault contact with the Middle Paleozoic Quincy Granite ( Wones and Goldsmith, 1991 ). Landing (1996) regarded the Braintree...
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