Gold distrubution in glacial sediments and soils at Spyder Lake, Hope Bay greenstone belt, NWT and the effects of a permafrost environment
department or school: Science, Faculty of
department or school: Earth, Ocean and Atmospheric Sciences, Department of
data provider: DSpace
degree campus: UBCV
creator: Laurus, Kathryn Anne
issued: 2009-01-16T18:18:14Z
issued: 1995
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: There is a high potential for economic gold deposits in the Slave Structural Province, NWT. Gold exploration, however, is hampered by a complex cover of Quaternary sediments and limited bedrock outcrops. Furthermore, there is a lack of information on the glacial dispersion of gold and the effects, if any, of postglacial redistribution of gold under prevailing periglacial conditions. Therefore, the partitioning of gold among size and density fractions was determined for the various surficial materials in the vicinity of, and down-ice from, known gold mineralization in the southeastern portion of the Hope Bay Greenstone Belt, 650 km northeast of Yellowknife, NWT. Terrain mapping by Ryder (1992) identified several types of surficial materials consisting of weathered rock, till, marine sediments and mixtures of the different types. Soil and humus samples were collected from thirty-seven pits along five lines on the Wally Grid. The lowermost horizons from each pit, and A and B horizons from selected soil pits, were wet sieved into four size fractions between 2000 um and 212 um; the resulting -212 um fraction was analyzed for gold by fire assay-atomic absorption spectroscopy (FA-AAS). Samples from one grid line were further sieved to obtain the -53 um fraction which was analyzed for gold by FA-AAS. LFH horizons and bog samples were milled to -1000 um and organic-rich soils (Ah and O lenses) were dry sieved to -70 um, and were analyzed for gold by neutron activation analysis. Regional till samples down-ice from known mineralization were wet sieved into six size fractions. The -53 um fraction and light and heavy mineral separates of the - 212+106 um and -106+53 um fractions were analyzed for gold by FA-AAS. The -53 um fraction was analyzed for gold by aqua regia column-inductively coupled plasma spectrometry (AR column-ICP). Two distinct types of geochemical anomalies were identified in the study area: (i) an older gold anomaly in regional till, and (ii) a younger gold anom…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/3704
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note: GOLD DISTRIBUTION IN GLACIAL SEDIMENTS AND SOILS AT SPYDER LAKE, HOPE BAY GREENSTONE BELT, NWT; AND THE EFFECTS OF A PERMAFROST ENVIRONMENT by Kathryn Anne Laurus B.Sc. Hon. Carleton University, 1991 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in THE FACULTY OF GRADUATE STUDIES Department of Geological Sciences We accept this thesis as conforming to the required standard THE UNIVERSITY OF BRITISH COLUMBIA April 1995 © Kathryn Anne Laurus In presenting this thesis in partial fulfilment of the requirements f o r an advanced degree at the University of British Columbia, I agree that the Library shall make it freely available f o r reference and study. I further agree that permission for extensive copying of this thesis f o r scholarly purposes may be granted by the head of my department or by his or her representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. The University of British Columbia Vancouver, Canada DE-6 (2/88) 11 ABSTRACT There is a high potential for economic gold deposits in the Slave Structural Province, NWT. Gold exploration, however, is hampered by a complex cover of Quaternary sediments and limited bedrock outcrops. Furthermore, there is a lack of information on the glacial dispersion of gold and the effects, if any, of postglacial redistribution of gold under prevailing periglacial conditions. Therefore, the partitioning of gold among size and density fractions was determined for the various surficial materials in the vicinity of, and down-ice from, known gold mineralization in the southeastern portion of the Hope Bay Greenstone Belt, 650 km northeast of Yellowknife, NWT. Terrain mapping by Ryder (1992) identified several types of surficial materials consisting of weathered rock, till, marine sediments and mixtures of the different types. Soil and humus samples were collected from thirty-seven pits along fi…
has type: Thesis/Dissertation
date issued: 1995-05
is shown at: 10.14288/1.0052612
language: eng
degree discipline: Geological Sciences
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/3704