TGDG members and non members are encouraged to attend. Geosoft is the technology sponsor for the online portion of this event.
The Wolverine volcanogenic massive sulfide (VMS) deposit, Yukon, is a unique natural laboratory to study the interrelationships of magma evolution, tectonics, and basin redox in the genesis of VMS deposits in volcanic- and sediment-rich extensional basins. Pre-VMS (~352 Ma) quartz-feldspar porphyries (QFP) have continental crust-like Nb/Ta ~12, eNdt = -7.1 to -11.5 (average = -10.6), and eHft = -12.2 to -20.8 (average = -16.5). The syn-VMS (~347 Ma) feldspar porphyries have higher high field strength element (HFSE) and rare earth element (REE) concnetration, and higher Nb/Ta (~17), eNdt = -7.8 to -8.1 (average = -8.0), and eHft = -13.6 to -18.0 (average = -14.8). Both suites have and Proterozoic (to Archean) depleted mantle model ages (1.59-2.58 Ga). In situ U-Pb on zircons illustrate that while some ages are close to previously reported concordant TIMS ages, most samples have evidence of inheritance with ages ranging from 348-381.7 Ma for the QFP suite and 368.9-370.5 Ma for the FP suite. In situ eHft values for the zircons range from -11.5 to -21.0 (average -15.3) and -11.6 to -26.0 (average = -18.7) for the QFP and FP, respectively.
Evaluating the interplay of magmatism, tectonics, and basin redox in the genesis of the Wolverine volcanogenic massive sulfide (VMS) deposit, Yukon, Canada
Tuesday, January 17, 2017
4:00 PM - 5:00 PM, Toronto EST || Show in my time zone
Stephen J. Piercey completed BSc(Hons)(96) and MSc(98) degrees at Memorial University of Newfoundland and a PhD from the University of British Columbia (2001). From 2001-2008 he was Assistant and Associate Professor at Laurentian University...Read More