scholarly journals Borehole geophysical logs in Meguma gold occurrences, Nova Scotia (Beaver Dam, Moose River and Lake Charlotte areas)

1998 ◽  
Author(s):  
P G Killeen ◽  
B E Elliott ◽  
C N Aoki
Keyword(s):  
Nova Scotia ◽  
Beaver Dam ◽  
Geophysical Logs ◽  
Moose River

scholarly journals Borehole geophysical logs, South Mountain Batholith at Digby and the Wedgeport Granite, Nova Scotia

1997 ◽  
Author(s):  
B E Elliott ◽  
G R Bernius ◽  
P G Killeen
Keyword(s):  
Nova Scotia ◽  
South Mountain Batholith ◽  
Geophysical Logs

Province of Nova Scotia, Halifax County, Moose River Sheet, No 50

1898 ◽  
Author(s):  
E R Faribault
Keyword(s):  
Nova Scotia ◽  
Moose River

Tungsten Deposits of Moose River, Nova Scotia

1910 ◽  
Author(s):  
E R Faribault
Keyword(s):  
Nova Scotia ◽  
Tungsten Deposits ◽  
Moose River

Moose River, Pictou and Guysborough counties, Nova Scotia

1939 ◽  
Author(s):  
Keyword(s):  
Nova Scotia ◽  
Moose River

Paleolatitude and Tectonic Rotations of the Early Carboniferous Fountain Lake Group, Cobequid Highlands, Nova Scotia, Canada

2021 ◽  
Author(s):  
Kate Brooks ◽  
Phil J.A. McCausland ◽  
John W.F. Waldron
Keyword(s):  
Nova Scotia ◽  
Early Carboniferous ◽  
Strike Slip ◽  
Block Rotation ◽  
Beam Analysis ◽  
Recent Origin ◽  
Stable Characteristic ◽  
Dextral Strike Slip ◽  
Slip Motion ◽  
Moose River

The ca. 355 Ma Fountain Lake Group, in the Cobequid Highlands of Nova Scotia, is part of the transtensional basin fill which formed during dextral strike-slip motion between Avalonia and the Meguma terranes following the Acadian Orogeny. Paleomagnetic analysis of the Fountain Lake Group offers a paleolatitude estimate for the Laurentian accretionary margin in the Early Carboniferous and locality-specific paleomagnetic directions which indicate clockwise-sense block rotations during dextral strike-slip motion along the Cobequid Fault zone. Stepwise demagnetization of 142 specimens from 20 sites in three Fountain Lake Group localities across the Cobequid Highlands (Squally Point, West Moose River, and Wentworth exposures) reveals remanence consisting of an easily removed component of probable recent origin, and more persistent components carried by magnetite and hematite, which in petrographic and electron beam analysis appear to be of primary igneous and volcanic oxidation origins, respectively. Sites from all three localities carry stable characteristic remanent magnetization (ChRM) directions that assume similar moderate downward inclinations when tilt-corrected. A Block Rotation Fisher analysis inclination-only fold test demonstrated best agreement at 90% unfolding, showing that remanence acquisition pre-dates Alleghenian deformation in the Late Carboniferous and is most likely of primary 355 Ma age. Paleomagnetic results for the Squally Point, West Moose River and Wentworth localities show relative rotations between the blocks that are variously clockwise-rotated compared with a Laurentia cratonic reference frame. Inclinations at all three localities imply a subtropics paleolatitude for the margin (at Squally Point, 27.2° ± 9.4°; N= 7 sites), directly supporting the depicted location of Laurentia and its Appalachian accretionary margin in most Devonian to Early Carboniferous reconstructions.

Sulphur isotopic composition of sulphides from the Beaver Dam and other Meguma-Group-hosted gold deposits, Nova Scotia: implications for genetic models

1989 ◽  
Vol 26 (8) ◽  
pp. 1617-1629 ◽  
Author(s):  
Daniel J. Kontak ◽  
Paul K. Smith
Keyword(s):  
Nova Scotia ◽  
Gold Mineralization ◽  
Source Region ◽  
Gold Deposits ◽  
Genetic Models ◽  
Gold Deposition ◽  
Published Data ◽  
Sulphide Mineral ◽  
Beaver Dam ◽  
Wide Range

Sulphur isotopic compositions were determined for sulphide mineral phases in Meguma-Group-hosted gold deposits, Nova Scotia, in order to resolve (i) potential source regions for sulphur in these deposits, (ii) prevailing ambient physiochemical conditions during sulphide (and gold?) deposition, and (iii) possible implications of δ34S values on genetic models. The Beaver Dam deposit was selected as a test case, and results (± 1σ) from 32 sulphides analyzed for δ34S are as follows (‰): pyrite, 9.9 ± 1.1 (n = 16); pyrrhotite, 9.9 ± 0.2 (n = 4); arsenopyrite, 10.5 ± 0.4 (n = 11); and 9.4 for a single galena. The strikingly narrow range for sulphur isotope data and the sulphide mineral assemblage together are interpreted as implying that the prevailing chemical conditions during sulphide deposition remained at or below the H2S-SO4 buffer and constant relative to it, thus δ34Smineral is a good approximation of δ34Sfluid. Considering that the sulphide minerals analyzed represent a wide range in paragenesis and mode of occurrence, the uniform values suggest a homogeneous sulphur composition in the fluid, with little if any influence of local wall rocks during sulphide deposition. This is consistent with extensive alteration zones (i.e., silicification) throughout the deposit, indicating both high fluid/rock ratios and disequilibrium conditions. Data for an additional seven Meguma Group gold deposits (arsenopyrite only) indicate for δ34S a total range of about 9–25‰; however, the intradeposit variation is consistently small (2–3‰). These results are confirmed by previously published data for a variety of sulphide phases from three other deposits.Comparison of the results for Meguma-hosted deposits with a wide range of both similar and dissimilar gold deposits of variable age indicates that the large positive values (i.e., >9–10‰) are unique to the deposits examined. Two possible explanations are offered: first, the δ34S values originally may have been similar to those of other deposits (i.e., around 0‰ or slightly enriched) and then modified during transport to the site of deposition, or second, the source region of the fluids contained sulphur in an oxidized form (e.g., evaporites). The former hypothesis is currently favoured.Potential reservoirs for sulphur in the Meguma Zone include the Meguma Group metasedimentary rocks and younger peraluminous granitoid batholiths. The sulphur isotopic data are inconsistent with an unmodified magmatic source, and if the Meguma Group is favoured, then the dominant contribution was from the greywacke component. In the latter case, results for the Beaver Dam deposit may represent relatively unmodified fluid, whereas deposits characterized by enriched sulphur may reflect increasing amounts of greywacke-derived sulphur.The data somewhat constrain the possible genetic models for Meguma Group gold deposits. Syngenetic and magmatic models are considered unlikely; instead, a metamorphogenic origin is favoured. However, the ultimate source for mineralizing fluids is considered as lying beneath the Meguma Group, with variable amounts of contamination of this fluid during passage through Meguma Group strata. The relationship between gold mineralization and sulphur isotopic signatures of the associated sulphides is unclear, although a metamorphic protolith is probable.

scholarly journals Geological applications of borehole geophysical logs in Nova Scotia (Brazil Lake, Cape Sable Island, Chaswood, and New Canaan)

2001 ◽  
Author(s):  
B E Elliott ◽  
P G Killeen ◽  
M P Prince
Keyword(s):  
Nova Scotia ◽  
Geophysical Logs

Plan and Section, Moose River Gold District, Halifax County, Nova Scotia

1898 ◽  
Author(s):  
E R Faribault
Keyword(s):  
Nova Scotia ◽  
Moose River
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