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Journal Article

Gaseous mercury flux measurements from two mine tailing sites in the Seal Harbour area of Nova Scotia

J. Dalziel, R. Tordon
Published: 27 September 2013
Geochemistry: Exploration, Environment, Analysis (2014) 14 (1): 17–24.
DOI: https://doi.org/10.1144/geochem2011-112
...J. Dalziel; R. Tordon Abstract During August 2004, mercury (Hg) flux-rates from surface soil were measured at an abandoned gold mining site near Seal Harbour, Nova Scotia. The Hg amalgamation process, used to isolate gold, produced areas of Hg-laden mine tailings. Diurnal measurements of the soil...
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View PDF for article title, Gaseous mercury flux measurements from two mine tailing sites in the <span class="search-highlight">Seal</span> <span class="search-highlight">Harbour</span> area of Nova Scotia
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Image
Processed EO-1 Hyperion hyperspectral imagery of the Lower Seal Harbour study area on 8th July 2003 at 10:38 a.m. local time. The Lower Seal Harbour tailings site is easily identified as the white area in the centre of the image. The tailings site is located SSE of Seal Harbour Lake, and east of the Cape Sable Gas Plant (larger light grey area in the left centre of the image). Each pixel is 30 m × 30 m and the image is 175 × 155 pixels (or 5.25 km width × 4.65 km). The λ represents the 192 image planes of the processed Hyperion image, each image plane corresponding to a distinct spectral band.

Processed EO-1 Hyperion hyperspectral imagery of the Lower Seal Harbour stu...

Published: 22 August 2013
Fig. 4. Processed EO-1 Hyperion hyperspectral imagery of the Lower Seal Harbour study area on 8th July 2003 at 10:38 a.m. local time. The Lower Seal Harbour tailings site is easily identified as the white area in the centre of the image. The tailings site is located SSE of Seal Harbour Lake
Image
An overlay of the tailings end-member map on the Atlas of Canada map of the Seal Harbour Lake area. The Lower Seal Harbour tailings site is in the centre of the image. The Upper Seal Harbour tailings site is located above the upper left corner of the Atlas map. A third site (circled) was remotely detected. Waterways generally flow from the upper left to the lower right (towards the Atlantic Ocean). Note how tailings have been transported downstream along the brooks and wetlands.

An overlay of the tailings end-member map on the Atlas of Canada map of the...

Published: 22 August 2013
Fig. 13. An overlay of the tailings end-member map on the Atlas of Canada map of the Seal Harbour Lake area. The Lower Seal Harbour tailings site is in the centre of the image. The Upper Seal Harbour tailings site is located above the upper left corner of the Atlas map. A third site (circled
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Location of 2003 and 2004 regional humus, soil and till samples collected from the Seal Harbour area and 2003 tailings samples from Lower Seal Harbour.

Location of 2003 and 2004 regional humus, soil and till samples collected f...

Published: 22 August 2013
Fig. 2. Location of 2003 and 2004 regional humus, soil and till samples collected from the Seal Harbour area and 2003 tailings samples from Lower Seal Harbour.
Image
(A) GER3700 (foreground) and FieldSpec® Pro (upper left and inset) set-up on Lower Seal Harbour tailings site; (B) Gold Brook and surrounding wetlands underlain by tailings, Upper Seal Harbour, looking upstream (N).

( A ) GER3700 (foreground) and FieldSpec® Pro (upper left and inset) set-up...

Published: 22 August 2013
Fig. 7. ( A ) GER3700 (foreground) and FieldSpec® Pro (upper left and inset) set-up on Lower Seal Harbour tailings site; ( B ) Gold Brook and surrounding wetlands underlain by tailings, Upper Seal Harbour, looking upstream (N).
Journal Article

Mineralogy and spectral reflectance of soils and tailings from historical gold mines, Nova Scotia

J.B. Percival, H.P. White, T.A. Goodwin, M.B. Parsons, P.K. Smith
Published: 22 August 2013
Geochemistry: Exploration, Environment, Analysis (2014) 14 (1): 3–16.
DOI: https://doi.org/10.1144/geochem2011-071
...Fig. 4. Processed EO-1 Hyperion hyperspectral imagery of the Lower Seal Harbour study area on 8th July 2003 at 10:38 a.m. local time. The Lower Seal Harbour tailings site is easily identified as the white area in the centre of the image. The tailings site is located SSE of Seal Harbour Lake...
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View PDF for article title, Mineralogy and spectral reflectance of soils and tailings from historical gold mines, Nova Scotia
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Image
Grain-size distribution in tailings from Montague (MT); Goldenville (GV); and Lower Seal Harbour (LSH).

Grain-size distribution in tailings from Montague (MT); Goldenville (GV); a...

Published: 01 August 2011
Fig. 5 Grain-size distribution in tailings from Montague (MT); Goldenville (GV); and Lower Seal Harbour (LSH).
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CaO vs As2O5 plot of iron oxyhydroxides and arsenates from Montague, Lower Seal Harbour, and Goldenville. Colour figures are available in the online version.

CaO vs As 2 O 5 plot of iron oxyhydroxides and arsenates from Montague, Lo...

Published: 01 August 2011
Fig. 11 CaO vs As 2 O 5 plot of iron oxyhydroxides and arsenates from Montague, Lower Seal Harbour, and Goldenville. Colour figures are available in the online version.
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As concentrations in near-surface tailings at the (a) Montague; (b) Goldenville; and (c) Lower Seal Harbour gold districts based on sampling by Natural Resources Canada. The location of bulk tailings samples collected for the present study are shown by the large dark grey stars.

As concentrations in near-surface tailings at the ( a ) Montague; ( b ) Gol...

Published: 01 August 2011
Fig. 4 As concentrations in near-surface tailings at the ( a ) Montague; ( b ) Goldenville; and ( c ) Lower Seal Harbour gold districts based on sampling by Natural Resources Canada. The location of bulk tailings samples collected for the present study are shown by the large dark grey stars.
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As concentrations in near-surface tailings at the (a) Montague; (b) Goldenville; and (c) Lower Seal Harbour gold districts based on sampling by Natural Resources Canada. The location of bulk tailings samples collected for the present study are shown by the large dark grey stars.

As concentrations in near-surface tailings at the ( a ) Montague; ( b ) Gol...

Published: 01 August 2011
Fig. 4 As concentrations in near-surface tailings at the ( a ) Montague; ( b ) Goldenville; and ( c ) Lower Seal Harbour gold districts based on sampling by Natural Resources Canada. The location of bulk tailings samples collected for the present study are shown by the large dark grey stars.
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Scanning electron (back-scattered) photomicrograph of gypsum crystals in a 30–35 cm deep tailings sample taken from Lower Seal Harbour. This layer appeared black in the field and contains abundant siderite (not shown) (sample PNA03-04D, BSI, bar scale = 25 μm).

Scanning electron (back-scattered) photomicrograph of gypsum crystals in a ...

Published: 22 August 2013
Fig. 6. Scanning electron (back-scattered) photomicrograph of gypsum crystals in a 30–35 cm deep tailings sample taken from Lower Seal Harbour. This layer appeared black in the field and contains abundant siderite (not shown) (sample PNA03-04D, BSI, bar scale = 25 μm).
Image
Element maps and backscattered electron photomicrographs of (a) a grain of arsenopyrite and (b) a grain of Fe-sulphide (brighter phases) from Lower Seal Harbour bulk with alteration rims of As–Ca-bearing iron hydroxides and (c) a Fe-arsenate phase forming a rim and filling cracks of a silicate grain from Montague bulk. Colour figures are available in the online version.

Element maps and backscattered electron photomicrographs of ( a ) a grain o...

Published: 01 August 2011
Fig. 8 Element maps and backscattered electron photomicrographs of ( a ) a grain of arsenopyrite and ( b ) a grain of Fe-sulphide (brighter phases) from Lower Seal Harbour bulk with alteration rims of As–Ca-bearing iron hydroxides and ( c ) a Fe-arsenate phase forming a rim and filling cracks
Image
Element maps and backscattered electron photomicrographs of (a) a grain of arsenopyrite and (b) a grain of Fe-sulphide (brighter phases) from Lower Seal Harbour bulk with alteration rims of As–Ca-bearing iron hydroxides and (c) a Fe-arsenate phase forming a rim and filling cracks of a silicate grain from Montague bulk. Colour figures are available in the online version.

Element maps and backscattered electron photomicrographs of ( a ) a grain o...

Published: 01 August 2011
Fig. 8 Element maps and backscattered electron photomicrographs of ( a ) a grain of arsenopyrite and ( b ) a grain of Fe-sulphide (brighter phases) from Lower Seal Harbour bulk with alteration rims of As–Ca-bearing iron hydroxides and ( c ) a Fe-arsenate phase forming a rim and filling cracks
Image
Variation of As2O5 as a function of Fe2O3 in iron oxyhydroxides and arsenates from Montague, Lower Seal Harbour and Goldenville. Arrows with mineral labels point to theoretical mineral compositions. Diagonal lines with numbers are Fe/As molar ratios.

Variation of As 2 O 5 as a function of Fe 2 O 3 in iron oxyhydroxides and...

Published: 01 August 2011
Fig. 10 Variation of As 2 O 5 as a function of Fe 2 O 3 in iron oxyhydroxides and arsenates from Montague, Lower Seal Harbour and Goldenville. Arrows with mineral labels point to theoretical mineral compositions. Diagonal lines with numbers are Fe/As molar ratios. Adapted from Paktunc et al
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Fig. 1. General geology of the Meguma terrane of southern Nova Scotia with locations of Meguma gold deposits for which 40Ar/39Ar data are available (Kontak et al., 1990a, 1993, 1996, and this study). Inset box outlines the Meguma and Avalon zones. B = Beaver Dam, BPP = Barrington Passage pluton, C = Caribou, F = Fifteen Mile Stream, KP = Kinsac pluton, M = Moose River, MB = Musquodoboit batholith, O = The Ovens, PMP = Port Mouton pluton, T = Tangier, US = Upper Seal Harbour, W = West Gore.

F ig . 1. General geology of the Meguma terrane of southern Nova Scotia wit...

Published: 01 May 2002
Passage pluton, C = Caribou, F = Fifteen Mile Stream, KP = Kinsac pluton, M = Moose River, MB = Musquodoboit batholith, O = The Ovens, PMP = Port Mouton pluton, T = Tangier, US = Upper Seal Harbour, W = West Gore.
Image
Map created by unmixing processes to fourteen basic end-members which can be grouped into four categories: vegetation, water, industrial/coastal (includes buildings, parking lots, gravel roads etc), and tailings. Note the identification of sites of interest to the east and west of Seal Harbour Lake, and to the south-east of the known tailings waste sites. These sites identify areas where the spectral features of exposed tailings are detected via the weakly constrained unmixing method. Each pixel is 30 m × 30 m and the image is 175 × 155 pixels (or 5.25 km width × 4.65 km).

Map created by unmixing processes to fourteen basic end-members which can b...

Published: 22 August 2013
Fig. 12. Map created by unmixing processes to fourteen basic end-members which can be grouped into four categories: vegetation, water, industrial/coastal (includes buildings, parking lots, gravel roads etc), and tailings. Note the identification of sites of interest to the east and west of Seal
Image
Generalized geology of the Meguma terrane, Nova Scotia, Canada, showing the location of Meguma gold deposits sampled for Re-Os dating: The Ovens, Dufferin, and Touquoy. Circled numbers denote location of other gold deposits referred to in the text, including (1) West Gore, (2) Caribou, (3) Beaver Dam, (4) Tangier, (5) Fifteen Mile Stream, (6) Upper Seal Harbour, as well as the East Kemptville tin deposit (7). Inset shows relative position of the Meguma terrane to other Appalachian terranes: the Avalon terrane (AT), and the Gander (GZ), Dunnage (DZ), and Humber (HZ) zones.

Generalized geology of the Meguma terrane, Nova Scotia, Canada, showing the...

Published: 01 September 2005
, (3) Beaver Dam, (4) Tangier, (5) Fifteen Mile Stream, (6) Upper Seal Harbour, as well as the East Kemptville tin deposit (7). Inset shows relative position of the Meguma terrane to other Appalachian terranes: the Avalon terrane (AT), and the Gander (GZ), Dunnage (DZ), and Humber (HZ) zones.
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(A) Scanning electron (back-scattered) photomicrograph of tailings sample showing typical texture and grain size distribution from a Lower Seal Harbour surface sample (0–20 cm) with a yellowish-brown coarse fraction and a reddish-brown fine-grained fraction. Contains 56 % mica/illite, 18 % chlorite, 15 % quartz, 11 % plagioclase, and trace amounts of Fe-oxides, arsenopyrite, galena and thorite. Mica/illite includes both muscovitic and biotitic varieties (sample PNA03-07A, bar scale = 50 μm); (B) Close-up view (scale bar = 10 μm) (Apy, arsenopyrite; Chl, Chlorite; Fe-O, Fe-Oxides; Ill, Mica or Illite; Pl, Plagioclase Feldspar).

( A ) Scanning electron (back-scattered) photomicrograph of tailings sample...

Published: 22 August 2013
Fig. 5. ( A ) Scanning electron (back-scattered) photomicrograph of tailings sample showing typical texture and grain size distribution from a Lower Seal Harbour surface sample (0–20 cm) with a yellowish-brown coarse fraction and a reddish-brown fine-grained fraction. Contains 56 % mica/illite
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Simplified geological map of the eastern Meguma terrane modified after Barr et al. (2022a) showing the location of Devonian plutonic units and the locations of dated samples. Coordinates given using NAD83 map projection and UTM coordinate system (UTM zone 20). Abbreviations: BR, Bull Ridge pluton; CA, Canso plutonic suite; CL, Cranberry Lake pluton; FH, Forest Hills and Garry Lakes plutons; HC, Halfway Cove pluton; KB, Kelly Brook pluton; LR, Larrys River pluton; MB, Musquodoboit Batholith; ML, Mulgrave Lake pluton; MQ, Musquodoboit Batholith; RL, River Lake pluton; SA, Sangsters Lake pluton; SE, Seloam Lake pluton; SH, Seal Harbour pluton; SB, Sherbrooke pluton; SMB, South Mountain Batholith; TPS, Trafalgar plutonic suite; QP, Queensport pluton.

Simplified geological map of the eastern Meguma terrane modified after Bar...

Published: 05 July 2024
Lake pluton; SE, Seloam Lake pluton; SH, Seal Harbour pluton; SB, Sherbrooke pluton; SMB, South Mountain Batholith; TPS, Trafalgar plutonic suite; QP, Queensport pluton.
Journal Article

Redefinition of the Wild Bight Group, Newfoundland: implications for models of island-arc evolution in the Exploits Subzone

Kate MacLachlan, Brian H. O’Brien, Greg R. Dunning
Published: 11 June 2001
Canadian Journal of Earth Sciences (2001) 38 (6): 889–907.
DOI: https://doi.org/10.1139/e01-006
..., and the Side Harbour Formation is included as part of the Seal Bay Brook Formation. The upper Wild Bight Group is interpreted to represent a second and distinct arc sequence that formed on the Gondwanan continental margin. There is a ca. 10 million-year hiatus in volcanic activity between the Glovers Harbour...
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View PDF for article title, Redefinition of the Wild Bight Group, Newfoundland: implications for models of island-arc evolution in the Exploits Subzone
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