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Hope Valley Terrane

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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 Esmond–Dedham terrane lacks any clear previous relationships to other rocks...
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 1990
DOI: 10.1130/SPE245-p155
... of the regional setting of the lithologies of the New Bedford area are possible, currently the most plausible considers the lithologies of Group I to be a continuation of the Esmond-Dedham terranes, while Group II may be correlative with either the Hope Valley terrane or the Bass River Complex. ...
Series: GSA Special Papers
Published: 01 January 1989
DOI: 10.1130/SPE230-p213
... terranes, but are too small to consider as separate terranes. Volcanic-arc terranes include the Chopawamsic, Carolina, Spring Hope, Roanoke Rapids, and Charleston terranes. The only terrane recognized as a continental terrane of Gondwanaland affinity is the Suwannee terrane, which contains rocks believed...
Journal Article
Journal: Economic Geology
Published: 01 August 2012
Economic Geology (2012) 107 (5): 991-1042.
...Ross L. Sherlock; Andrew Shannon; Manfred Hebel; Darren Lindsay; Julianne Madsen; Hamish Sandeman; Blair Hrabi; James K. Mortensen; Richard M. Tosdal; Richard Friedman Abstract The Archean Hope Bay greenstone belt is located in the Bathurst Block of the northeastern part of the Slave Structural...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 2016
GSA Bulletin (2016) 128 (11-12): 1736-1761.
... sample HS1-4 from peat unit 6p. The event date is bracketed between ca. 412 C.E. and 627 C.E. Figure 10. Hope River downcutting curve for the Hope River Valley. Age of the Hope Shelter terrace was estimated using the curve. The older-than-expected OSL age results may be explained...
Journal Article
Published: 01 January 2006
Exploration and Mining Geology (2006) 15 (1-2): 101-121.
... approximately 2.67 Ga ago ( Bevier and Gebert, 1991 ). A 2.65-Ga heterogeneous gneissic terrane, possibly turbiditic in nature, and several granitoid intrusions define the southeastern margin of the belt ( Hebel, 1999 ). To the west, the Hope Bay volcanic belt is bounded by granodioritic to granitic rocks...
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Journal Article
Journal: GSA Bulletin
Published: 01 February 1985
GSA Bulletin (1985) 96 (2): 272-282.
... be recognized: (1) the Esmond Granite and related plutonic rocks in northern Rhode Island, ranging in composition from gabbro to granite and yielding an upper concordia intercept of 621 ± 8 m.y., and (2) quartz-rich, recrystallized gneissic rocks (Ten Rod Granite Gneiss and Hope Valley Alaskite Gneiss...
Journal Article
Journal: GSA Bulletin
Published: 01 July 1980
GSA Bulletin (1980) 91 (7_Part_II): 1669-1741.
... and deformation has caused complete recrystallization of the feldspars in parts of the granite. Some of this metamorphism occurred during Permian time, but the effects of earlier episodes cannot be evaluated. Geologic Setting We have studied the Scituate Granite Gneiss (SGG), Hope Valley Alaskite Gneiss (HVA...
Journal Article
Published: 17 September 2003
Canadian Journal of Earth Sciences (2003) 40 (9): 1203-1218.
...David W. Eaton; Jacqueline Hope Abstract The Great Slave Lake shear zone (GSLsz) exposes lower crustal rocks analogous to deep-seated segments of modern strike-slip fault zones, such as the San Andreas fault. Extending for 1300 km beneath the Western Canada Sedimentary Basin to the southern margin...
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Series: GSA Field Guide
Published: 01 January 2015
DOI: 10.1130/2015.0040(11)
EISBN: 9780813756400
... context. In the case of the Great Valley, the geologic evidence suggests that the karst initially formed by rising groundwater flow under confined (hypogenic) conditions. In such settings, geologic structural information obtained through mapping and combined with geochemical and hydrologic data is crucial...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0024(03)
EISBN: 9780813756240
... Figure 1. Maps showing the regional Archean geologic context for rocks exposed in the Minnesota River Valley terrane. Areas of Proterozoic outcrops, other than rocks of the Midcontinent rift system (MCR), are not shown (MCR beneath Paleozoic cover is based...
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Journal Article
Published: 01 June 2003
Scottish Journal of Geology (2003) 39 (1): 17-28.
... in the Moffat Shale Group (Birkhill Shale Formation) at the western end of the Ettrick Valley and at Dob’s Linn, and is also known from a mudstone interbed in turbidite sandstones to the north of the Megget Dam. Its associates include Torquigraptus magnificus (Přibyl & Münch), recorded for the first time...
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Journal Article
Journal: GSA Bulletin
Published: 11 May 2017
GSA Bulletin (2017) 129 (9-10): 1158-1180.
... spectroscopy (FT-IR) analysis was performed at Appalachian State University on a Thermo Nicolet Magna 550 Spectrometer, using a KBr pellet press technique (0.25% sample in KBr) over a wavelength of 400–4000 cm –1 . The sampled Shenandoah Valley sites fall into two main categories: (1) concretionary masses...
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Journal Article
Journal: Economic Geology
Published: 01 August 2012
Economic Geology (2012) 107 (5): 755-780.
...Stephen J. Barnes; Marco L. Fiorentini Abstract Komatiites are found in most Archean granite-greenstone terranes, but sulfide Ni mineralization associated with these rocks has a very biased distribution. The global endowment of sulfides Ni in Archean komatiites is overwhelmingly dominated...
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Journal Article
Published: 17 March 2014
Canadian Journal of Earth Sciences (2014) 51 (5): 485-499.
...‰ and 11.0‰, relative to Vienna Standard Mean Ocean Water (VSMOW). Zircons from two plutons in the Avalon terrane reveal the presence of anomalously low-δ 18 O (<4‰) zircons, lower than typical value for mantle-derived material, viz. 5.3‰ ± 0.6‰ (2σ). These rocks are the Ediacaran Hope Valley Plagioclase...
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Journal Article
Published: 31 May 2019
South African Journal of Geology (2019)
.... The lithostratigraphic subdivision of the rock units comprising the Kheis Province has been a source of much controversy. From detailed study of aerial photography and satellite imagery, as well as field-based studies, the outcrop patterns in the Kheis Province and Kaaien Terrane were reinterpreted and a new...
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Series: GSA Field Guide
Published: 01 January 2017
DOI: 10.1130/2017.0047(02)
EISBN: 9780813756479
... on the flanks (Fig. 2 ). The Blue Ridge occupies a unique position in the Appalachian orogen, as it separates the thin-skinned fold-and-thrust belt of the Valley and Ridge province to the NW from the metamorphosed terranes in the Piedmont to the SE (Figs. 1 and 2 ). The Blue Ridge Mountains are located...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2004
GSA Bulletin (2004) 116 (7-8): 989-1015.
...Cynthia Dusel-Bacon; Joseph L. Wooden; Melanie J. Hopkins Abstract New SHRIMP (sensitive, high-resolution ion microprobe) U-Pb zircon ages and trace element geochemical data for mafic and felsic metaigneous rocks of the pericratonic Yukon-Tanana terrane in east-central Alaska help define...
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Journal Article
Journal: GSA Bulletin
Published: 01 April 2002
GSA Bulletin (2002) 114 (4): 462-475.
...Jennifer L.E. Unterschutz; Robert A. Creaser; Philippe Erdmer; Robert I. Thompson; Kenneth L. Daughtry Abstract New geochemical and Nd isotopic data from Triassic (ca. 220 Ma) clastic metasedimentary rocks assigned to the Quesnel terrane (Quesnellia) in southeastern British Columbia show...
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