scholarly journals Geochemical data from stream silts and surface waters in the Pine Point Mining District, Northwest Territories (NTS 85-B)

2014 ◽  
Author(s):  
M W McCurdy ◽  
R J McNeil
Keyword(s):  
Northwest Territories ◽  
Surface Waters ◽  
Geochemical Data ◽  
Mining District ◽  
Pine Point

scholarly journals Geochemical data for lake sediments and surface waters, Abitau Lake area, Northwest Territories (NTS 75-B)

2016 ◽  
Author(s):  
M W McCurdy ◽  
S J Pehrsson ◽  
H Falck ◽  
S J A Day ◽  
J E Campbell
Keyword(s):  
Lake Sediments ◽  
Northwest Territories ◽  
Surface Waters ◽  
Geochemical Data ◽  
Lake Area

scholarly journals Micromorphological descriptions of till from pit K-62, Pine Point mining district, Northwest Territories

2014 ◽  
Author(s):  
J M Rice ◽  
R C Paulen ◽  
J Menzies ◽  
M B McClenaghan
Keyword(s):  
Northwest Territories ◽  
Mining District ◽  
Pine Point

Microsedimentological evidence of vertical fluctuations in subglacial stress from the northwest sector of the Laurentide Ice Sheet, Northwest Territories, Canada

2019 ◽  
Vol 56 (4) ◽  
pp. 363-379
Author(s):  
Jessey M. Rice ◽  
John Menzies ◽  
Roger C. Paulen ◽  
M. Beth McClenaghan
Keyword(s):  
Northwest Territories ◽  
Ice Sheet ◽  
Open Pit ◽  
Laurentide Ice Sheet ◽  
Mining District ◽  
Thin Sections ◽  
Glacial Dynamics ◽  
Lead Zinc ◽  
Pine Point

The past-producing Pine Point lead–zinc mining district, Northwest Territories, Canada, provides a unique opportunity to study the role of glacial dynamics in a thick, continuous till succession that has not been influenced by the underlying bedrock topography. Parts of the Pine Point mining district are covered by >20 m of subglacial Quaternary sediments (till) associated with the former Laurentide Ice Sheet. Till facies exposed in unreclaimed open-pit K-62 have been classified into four separate units. Micro- and macrosedimentological analyses were undertaken to identify the change in subglacial stress during sediment deposition and across till unit boundaries. An analysis of high- and low-angle microshears (lineations) in thin sections produced from these till units indicate that there is a noticeable decrease in the abundance of low-angle shear features immediately below till unit boundaries. The deformation of low-angle shears in the underlying tills was likely caused by remobilization of the overlying till unit. This remobilization is consistent with aggradation-constant entrainment decay mechanisms for subglacial till emplacement and accretion and subglacial dispersion models.

Characterization and dispersal of indicator minerals associated with the Pine Point Mississippi Valley-type (MVT) district, Northwest Territories, Canada

2015 ◽  
Vol 52 (9) ◽  
pp. 776-794 ◽  
Author(s):  
N.M. Oviatt ◽  
S.A. Gleeson ◽  
R.C. Paulen ◽  
M.B. McClenaghan ◽  
S. Paradis
Keyword(s):  
Northwest Territories ◽  
Major Element ◽  
Bimodal Distribution ◽  
Mississippi Valley ◽  
Element Geochemistry ◽  
Element Concentrations ◽  
Pine Point ◽  
Indicator Minerals ◽  
Mississippi Valley Type ◽  
Valley Type

A glacial dispersal study was conducted around a subcropping Pb–Zn deposit (O28) in the Pine Point Mississippi Valley-type (MVT) district, Northwest Territories, Canada, with the intent of characterizing and documenting the indicator minerals and their dispersal from a known orebody. Mapping of striations adjacent to deposit O28, and throughout the Pine Point district, along with observed glacial stratigraphy, indicate that there are three phases of ice flow that have affected the Pine Point district. Sphalerite, galena, and pyrite were identified in mineralized bedrock samples at deposit O28, and sphalerite and galena were recovered from the sand fraction of till samples up to 500 m from the mineralized subcrop. The majority of sphalerite and galena grains recovered from till samples down-ice of deposit O28 were 0.25–0.5 mm in size. Size and morphology of sphalerite grains in till demonstrate relative proximity to their bedrock source, with the largest and more angular grains being closer to the ore zone (<50 m) whereas smaller and more rounded grains occur further down-ice (∼250 m). The paragenesis, textures, major-element concentrations, and S and Pb isotopic compositions of bedrock samples from deposit O28 and from newly drilled core from four other deposits were characterized. Concentrations of Zn in bedrock sphalerite grains range from 43.95 to 67.48 wt.%, concentrations of S range from 32.03 to 34.01 wt.%, and concentrations of Fe range from 0.02 to 16.94 wt.%. The Fe concentration in bedrock sphalerite decreases from east to west across the district. Concentrations of S in galena grains in bedrock range from 12.50 to 14.00 wt.% and have a bimodal distribution. Generally, the geochemistry of sphalerite grains recovered from till were statistically similar to bedrock grains recovered from deposits O28 and L65. Major-element concentrations were statistically the same between the sphalerite grains recovered from till and the honey-brown and cleiophane varieties in the bedrock samples. Galena grains recovered from till samples were similar to the cubic and fracture-fill varieties of grains recovered from bedrock in the R190 and M67 deposits. Sulphur isotopic values for sphalerite grains from bedrock range from 20.6‰ to 24.2‰, while those from till samples range from −5.3‰ to 24.4‰. Lead isotopic ratios for galena grains from bedrock and till samples had very little variation, which is a characteristic of the Pine Point district. The S and Pb isotopic studies as well as major-element geochemistry suggest that indicator minerals derived from Pine Point-type mineralization can be distinguished from those sourced from other types of carbonate-hosted mineralized systems (e.g., Cordilleran zinc–lead deposits) and that the methods here can be used as exploration tools for identifying MVT deposit provenance or potential. The results of this study present criteria and highlights additional methods for exploration of MVT deposits in glaciated terrain.

scholarly journals The unique Abramovka REE-rich mineralization is a potential source of REE for the Pavlovsk coals deposit (Primorsky Krai, Russia)

2019 ◽  
Vol 98 ◽  
pp. 01007
Author(s):  
Igor Chekryzhov ◽  
Irina Tarasenko ◽  
Elena Vakh ◽  
Sergey Vysotsky
Keyword(s):  
Surface Waters ◽  
Volcanic Rocks ◽  
Geochemical Data ◽  
Similar Distribution ◽  
Humic Matter ◽  
Primorsky Krai ◽  
Peat Accumulation ◽  
Near Surface ◽  
Ree Mineralization ◽  
Potential Source

The unique REE mineralization of the Abramovka ore occurrence, associated near-surface waters, and REE-rich coals of the Pavlovka basin were studied. The authors, on the base of new isotope-geochemical data and K-Ar dating, suggest that the Abramovka REE minerals (hydrocarbonates, hydrophosphates and hydroxides) formed as a result of interaction of the Palaeozoic metasedimentary and Mesozoic volcanic rocks with near-surface waters. In the Pavlovka metalliferous coals, REE are concentrated predominantly in a humic matter that sorbed REE from water solutions during the peat accumulation stage. A similar distribution of REE in the Abramovka ores, associated near-surface waters, and metalliferous coals of the Pavlovka basin suggest that the Abramovka-type mineralization might be a major source of REE enrichment in the Pavlovka coals.

scholarly journals Mercury Speciation and Microbial Transformations in Mine Wastes, Stream Sediments, and Surface Waters at the Almadén Mining District, Spain

2004 ◽  
Vol 38 (16) ◽  
pp. 4285-4292 ◽  
Author(s):  
John E. Gray ◽  
Mark E. Hines ◽  
Pablo L. Higueras ◽  
Isaac Adatto ◽  
Brenda K. Lasorsa
Keyword(s):  
Surface Waters ◽  
Stream Sediments ◽  
Mercury Speciation ◽  
Mining District ◽  
Mine Wastes ◽  
Microbial Transformations

Migration of natural radionuclides in surface waters in the El’kon uranium mining district, southern Yakutia

2015 ◽  
Vol 53 (11) ◽  
pp. 1002-1011 ◽  
Author(s):  
P. I. Sobakin ◽  
A. P. Chevychelov ◽  
Ya. R. Gerasimov
Keyword(s):  
Surface Waters ◽  
Natural Radionuclides ◽  
Uranium Mining ◽  
Mining District ◽  
Southern Yakutia
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