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TitleTill Geochemistry over the Acadian Plutonic Complex, Central New Brunswick
AuthorParkhill, M A; Pronk, A G; Desrosiers, M; Boldon, G R; Richards, M; Phillips, S
SourceAbstracts 2011: Exploration, Mining and Petroleum New Brunswick / Résumés 2011: Exploration et exploitation minière et pétrolière au Nouveau-Brunswick; by Smith, E A (ed.); 2011 p. 39-40
Alt SeriesEarth Sciences Sector, Contribution Series 20120486
MeetingExploration, Mining and Petroleum New Brunswick; Fredericton; CA; November 2011
Lang.English; French
Mediapaper; on-line; digital
File formatpdf
ProvinceNew Brunswick
NTS21J/06; 21J/07
Lat/Long WENS-67.2500 -66.7500 46.5000 46.2500
Subjectstills; till geochemistry; tungsten; molybdenum; igneous rocks; granites; bedrock geology; dispersal patterns; ice movement directions; Sisson deposit; Cambrian; Ordovician; Silurian; Devonian
ProgramIntrusion/Porphyry Ore Systems, Targeted Geoscience Initiative (TGI-4)
LinksOnline - En ligne
AbstractRegional till geochemical sampling was conducted in the Juniper (21J/11) and Tuadook Lake (21J/15) areas of the Miramichi Highlands. This was a provincial component of a project under the Targeted Geoscience Initiative (TGI-4), focusing on intrusion related mineral deposits in the Acadian Plutonic Complex. Approximately 475-500 basal till samples were collected from this underexplored area of central New Brunswick that has potential for Sn, W, Mo, base metals, and rare earth elements. This project is a continuation of the Geological Surveys Branch 2-km interval till sampling program that started in the mid-80s and will almost complete coverage of the province on a regional scale. The McKendrick Lake (21J/16) area, one of the few not yet covered, will be sampled in 2012.
The glacial history of the area is relatively well-known through work by A.A. Seaman to the south and A.G. Pronk, M.A. Parkhill, and A. Doiron to the north. The study areas are covered by glacial deposits of variable thickness, genesis, and composition that largely reflect the variability in the underlying bedrock and the glacial history. Thick sections of in-situ weathered granite with core stones, outwash gravels in the Juniper area, and 15 m till sections in drill holes in the Sisson Brook W-Mo deposit area to the south are an indication of some of the stratigraphy that will have to be taken into consideration in interpreting the geochemical results. The most common surface deposit is a veneer to blanket of basal till that reflects local bedrock sources. Locally this is capped by a surface boulder lag. Access is largely through forest roads (crown, Irving, and Acadian Timber) and old trails and is generally good, except for the Kennedy Lakes Protected Area that straddles the eastern edge of the Tuadook Lake map area. Even though mineral exploration is prohibited in Protected Areas, it is important to obtain a few samples within these areas to complete the regional geochemical picture.