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TitleRegional Scale Till Geochemistry over the Acadian Plutonic Complex and the Sisson Brook W-Mo-Cu Deposit Indicator Mineral Case Study, central New Brunswick
AuthorParkhill, M A; Pronk, A G; McClenaghan, M B; Seaman, A A; Desrosiers, M; Boldon, G R; Richards, M; Phillips, S; Rice, J M
SourceIn Abstracts 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. 37-38
Alt SeriesEarth Sciences Sector, Contribution Series 20120485
MeetingExploration, Mining and Petroleum New Brunswick; Fredericton; CA; November 2011
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 scale till geochemical sampling was conducted in the Juniper (21J/11) and Tuadook Lake (21J/15) areas of the Acadian Plutonic Complex as a provincial component of the Intrusion Related Ore System Project of the Geological Survey of Canada’s Targeted Geoscience Initiative (TGI-4). A total of 475-500 basal till samples were collected on a 2 km grid to assess the potential of the areas to host Sn, W, Mo, base metals, and rare earth elements mineralization. These areas are covered by glacial deposits of variable thickness, genesis, and composition that largely reflect the variability in the underlying bedrock and glacial history. The most common surface deposit is a veneer to blanket (up to 2 m thick) of basal till that reflects local bedrock sources. Locally this is capped by a surface boulder lag.
A second TGI-4 drift prospecting project carried out by the Geological Survey of Canada and the New Brunswick Department of Natural Resources was a till sampling program around the Sisson Brook W-Mo-Cu deposit in collaboration with Northcliff Resources Ltd. The purpose of the case study is to document indicator mineral and matrix geochemical signatures in till at varying distances down-ice of the deposit. This case study will be the first to document glacial dispersal of W-bearing minerals around a significant W deposit. Approximately 60-70 till samples were collected up-ice, overlying, and up to 14 km down-ice (southeast) of the Sisson Brook deposit. In addition, 11 bedrock samples were collected from outcrops or diamond drill holes that intersected mineralization or surrounding host rock lithologies. These bedrock samples will be processed to produce heavy mineral concentrates and examined to recover minerals indicative of the W-Mo-Cu mineralization as well as document background host rock mineral assemblages. On-site analysis of subsamples of till with a portable XRF (PXRF) helped to focus subsequent till sampling. Anomalous concentrations of W, Mo, and Cu determined by PXRF match previously known DNR anomalous concentrations in the Sisson Brook dispersal train extending 14 km to the south to southeast.