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- W2049545361 abstract "Research Article| July 01, 2006 A Physical Volcanological, Chemostratigraphic, and Petrogenetic Analysis of the Little Falls Member, Tetagouche Group, Bathurst Mining Camp, New Brunswick W.S. DOWNEY; W.S. DOWNEY 1Department of Geology, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, E3B 5A3. Search for other works by this author on: GSW Google Scholar S.R. McCUTCHEON; S.R. McCUTCHEON 2New Brunswick Department of Natural Resources, Geological Surveys Branch, P.O. Box 50, Bathurst, New Brunswick, E2A 3Z1. Search for other works by this author on: GSW Google Scholar D.R. LENTZ D.R. LENTZ 1Department of Geology, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, E3B 5A3. Search for other works by this author on: GSW Google Scholar Exploration and Mining Geology (2006) 15 (3-4): 77–98. https://doi.org/10.2113/gsemg.15.3-4.77 Article history received: 27 Oct 2004 accepted: 12 Oct 2006 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation W.S. DOWNEY, S.R. McCUTCHEON, D.R. LENTZ; A Physical Volcanological, Chemostratigraphic, and Petrogenetic Analysis of the Little Falls Member, Tetagouche Group, Bathurst Mining Camp, New Brunswick. Exploration and Mining Geology 2006;; 15 (3-4): 77–98. doi: https://doi.org/10.2113/gsemg.15.3-4.77 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyExploration and Mining Geology Search Advanced Search Abstract The Little Falls member of the Nepisiguit Falls Formation is situated in the northern part of the Brunswick Belt of the Bathurst Mining Camp and has been interpreted as the distal equivalent of proximal tuffaceous rocks that host the stratiform Brunswick No. 12 and No. 6 Pb-Zn massive sulfide deposits. It comprises fine-grained, greenish-gray tuffaceous sandstone in the lower part, and coarse-grained, crystal-rich tuffaceous sandstone in the upper part. Petrographic evidence suggests that these rocks have a turbiditic origin. The Little Falls member is underlain by the Vallée Lourdes member, mainly composed of relatively shallow-water calcareous rocks, and is conformably overlain by Mn-rich sedimentary rocks, mainly red argillites that host the Tetagouche Falls Mn-(Fe) deposit. All these rocks are considered to belong to the Nepisiguit Falls Formation, part of the Ordovician Tetagouche Group.Whole-rock geochemical data from the fine-grained tuffaceous sandstone and coarse-grained tuffaceous sandstone indicate that the two units of the Little Falls member are distinct. Zr and TiO2 contents, and total rare earth element (REE) values are higher in the coarse-grained unit (average Zr/TiO2 = 0.040, average ∑REE = 247 ppm, n = 6) than in the fine-grained unit (average Zr/TiO2 = 0.048, average ∑REE = 158 ppm, n = 17), which can be attributed to the variation in crystal content between the two units. Both units are HREE-enriched and have elevated La/Yb relative to the typical Nepisiguit Falls Formation. Overall, the geochemical data combined with evidence from the bounding units suggest that the Little Falls member was deposited in relatively shallow water, possibly in a near-arc environment. The relationship of volcanic facies within the Nepisiguit Falls Formation and the geochemistry of these facies indicate strongly that fine grained, reworked tuffaceous rocks, regardless of whether they are the distal equivalents of proximal tuffaceous rocks, are not associated with the major ore-bearing horizons of the Bathurst Mining Camp. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2049545361 title "A Physical Volcanological, Chemostratigraphic, and Petrogenetic Analysis of the Little Falls Member, Tetagouche Group, Bathurst Mining Camp, New Brunswick" @default.
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