Volcanic stratigraphy, structural geology, and gold mineralization in the Wolverine-Doris corridor, northern Hope Bay volcanic belt, Nunavut
Ross Sherlock, R L Carpenter, C Quang
Abstract
Ross Sherlock, R L Carpenter, C Quang
Abstract
The northern part of the Hope Bay volcanic belt is a mainly bimodal volcanic assemblage. The mafic suite includes intercalated Mg- and Fe-tholeiitic basalts with textural variations. The felsic suite includes dacitic volcaniclastic rocks and coherent flows or sills, with subvolcanic intrusions. The Windy lake felsic rocks show a gradation to more proximal phases to the north. There is good evidence for a synvolcanic structure that juxtaposed different volcanic suites and is capped by a sedimentary package without any obvious offset. Gold mineralization in the area is variable in terms of alteration and morphology, but all types originated during a progressiveD2 event. Synvolcanic mineralization is also recognized at lithological contacts, mainly within the felsic volcanic suites.
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The northern part of the Hope Bay volcanic belt is a mainly bimodal volcanic assemblage. The mafic suite includes intercalated Mg- and Fe-tholeiitic basalts with textural variations. The felsic suite includes dacitic volcaniclastic rocks and coherent flows or sills, with subvolcanic intrusions. The Windy lake felsic rocks show a gradation to more proximal phases to the north. There is good evidence for a synvolcanic structure that juxtaposed different volcanic suites and is capped by a sedimentary package without any obvious offset. Gold mineralization in the area is variable in terms of alteration and morphology, but all types originated during a progressiveD2 event. Synvolcanic mineralization is also recognized at lithological contacts, mainly within the felsic volcanic suites.
Key concepts: Volcano, Geology, Bay, Geochemistry, Mineralization (soil science), Doris (gastropod), Stratigraphy, Volcanic belt