Geoscience BC Map 2010-14-1
Relative Drift Thickness Map, North-Central BC (93G, 93H/w & 93J/s)
Geoscience BC Map 2010-14-1 shows relative drift thickness in north-central BC, covering NTS mapsheets 93G, 93H/w and 93J/s. Constructed from previous mapping and recent field-checking, the map is intended as an aid to mineral exploration, providing information on the distribution and relative thickness of surficial sediments and generalized ice flow history. This will help to determine areas that are more suited for drift prospecting and bedrock prospecting, as well as provide guidance as to the dominant transport direction when interpreting the results of geochemical surveys.
The map in PDF format, the ESRI ArcGIS map document and data used to produce the map are included in this release. The datasets include ice flow indicators, drift thickness and outcrop locations, along with base map features providing background context. The report is by D.M. Maynard, B.C. Ward, M. Geertsema, N. Roberts and D. Sacco.
Geoscience BC Report 2013-08
Ice Flow Patterns in NTS 93G, H (west half), & J, and Detailed Ice Flow History for NTS 093J/05, /06, /11, /12, /13 & /14
The maps contained within this report show ice flow patterns for NTS 093G, H (west) and J, and detailed ice flow history for parts of NTS 093J (near Prince George, BC). The report also contains a regional ice flow model for the northern Interior Plateau region. Constructed from previous mapping and recent field studies, the report is intended as an aid to mineral exploration in central BC. The report consists of one PDF sheet, and the ESRI ArcGIS shapefiles of striations, regional ice flow and detailed ice flow data.
Geoscience BC Report 2013-10
New Terrain Maps in the McLeod Lake Map area (NTS 093J), British Columbia
Geoscience BC Report 2013-10 comprises six 1:50,000 terrain maps in the McLeod Lake map sheet (NTS 093J), as well as a digital data package. The maps are hybrid surficial geology / terrain maps that were produced using standardized terrain mapping methods. Surficial material, surface expression and geomorphological processes were used to delineate terrain polygons on 1:40,000 black-and-white aerial photographs. The map legend is a closed, surficial geology format based on the dominant surficial material and is used to assign polygon colours. Individual polygon labels can contain more detailed terrain information based on the terrain classification system. Where applicable, additional polygon information such as sediment descriptions and minor surficial materials and surface expressions are recorded in the terrain database.
The maps will be useful to the resource industry by indicating areas that contain till and therefore can be used in drift prospecting. The maps can also be used to identify various types of granular resources, such as aggregate for road building, fine grained (clay) material for lining tailings ponds, and bulk fill.
Geoscience BC Report 2013-15
Drift Prospecting for Porphyry Copper-Gold, Volcanogenic Massive Sulphide Mineralization and Precious and Base Metal Veins within the QUEST Project Area, Central British Columbia (NTS 093J)
Geoscience BC Report 2013-15 presents a large dataset and summarizes the results of regional till surveys and Quaternary studies conducted in the heart of the QUEST Project area. Regional-scale till sampling followed by detailed surveys around samples with elevated or anomalous values were carried out to assess the mineral potential, specifically targeting Cu-Au porphyry and volcanogenic massive sulphide (VMS) mineralization. Till is the preferred sampling medium for geochemical and mineralogical surveys in glaciated terrain such as in the QUEST area, because it is considered a first derivative of bedrock and has been shown to aid in identifying potentially mineralized bedrock units covered by thick glacial deposits. Along with the analytical data, this report describes these till sampling surveys and graphically displays the results from detailed aqua-regia ICP-MS and INAA analyses to help vector exploration efforts.
M.Sc. Thesis – D.Sacco
Quaternary geology in part of the McLeod Lake map-area (NTS 093J), central British Columbia – Simon Fraser University, 2012 – Available digitally through Simon Fraser University (pdf, 9 MB)
Abstract: The Quaternary geology in part of the McLeod Lake map-area was studied through the production and analysis of 1:50 000-scale terrain maps and the examination of stratigraphic exposures and landforms. The surficial geology is dominated by thick, streamlined till that thins where relief is high. Glaciofluvial outwash and ice-contact deposits occur throughout the area and extensive glaciolacustrine deposits blanket low-lying regions. The glacial stratigraphic record spans the Fraser Glaciation and is represented by a sequence of advance glaciolacustrine sediments, till and retreat glaciolacustrine and glaciofluvial sediments. Ice initially flowed into the study area from the northwest and retreated before the arrival of ice from the west and south. Ice-flow during the glacial maximum was northeast and transitioned to the east during deglaciation. Ground penetrating radar suggests that post-glacial aeolian activity was brief. Optical dating on K-feldspar from aeolian material suggests this activity occurred around 9.35 ± 0.64, 9.94 ± 0.77 and 13.3 ± 1 ka and provides minimum ages for ice retreat.