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SUMMARY:Direct Dating of Hydrothermal Cu-Au Systems Using Calcite U-Pb Dat
 ing - Dr Catherine Mottram - University of Portsmouth
DTSTART:20201123T180000Z
DTEND:20201123T190000Z
UID:TALK151996@talks.cam.ac.uk
CONTACT:James Craig
DESCRIPTION:Metals concentrate in fluids and magmas within the Earth’s c
 rust. For example\, interaction between magmatic intrusions\, fluids and t
 he surrounding rocks causes enrichment of metals such as copper\, gold and
  molybdenum in porphyry style deposits. In these settings\, the metals are
  intimately associated with veins containing minerals such as quartz and c
 alcite. In order to develop predictive models for mineralised systems it i
 s imperative to understand the timing of emplacement of these veins. Datin
 g of hydrothermal veins\, however\, has proved challenging due to lack of 
 suitable ‘datable’ material.\nHere we use the newly-developed U-Pb cal
 cite dating technique to test the capabilities of calcite dating for provi
 ding robust and critical timing constraints for ore-deposit models using t
 he Yukon in NW Canada as an example. The results represent a significant c
 ontribution to tectonic and mineralisation models for the region and explo
 re the role of major strike-slip faults for hosting and facilitating depos
 ition of economic Cu-Au deposits. Furthermore\, our results demonstrate th
 e potential for calcite U-Pb dating to provide timing constraints for hydr
 othermal mineralisation processes in a variety of deposit-type settings.\n
 \nPlease contact James at jac293@cam.ac.uk for Zoom details
LOCATION:The talk will be held virtually over zoom. The link will be circu
 lated to members via email\, while non-members may contact jac293@cam.ac.u
 k for details
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