Wed 24th May @ noon, Rm 312.222 

Abstract:

Although the source of metals for porphyry deposit systems is still debated, large magma chambers are commonly assumed to develop underneath the porphyry deposits. Systematic investigations of mineral texture and chemistry, generally focused on plagioclase, have been widely used to describe the processes occurring in the magma chamber of volcanic systems; however, similar studies of porphyry Cu deposits have been limited due to significant high temperature hydrothermal alteration. The intrusive rocks at Baguio district, Philippine, provides an excellent natural laboratory due to: 1) the young formation ages of the porphyry (Late Miocene to Pliocene); 2) a wide range of rocks (mafic to felsic) with well-defined geochemistry and geochronology; and 3) the well-preserved reversely, normally and oscillatory zoned minerals in most rock types.

Short bio:

Mingjian Cao obtained his Ph.D degree in September 2013 at Institute of Geology and Geophysics, Chinese Academy of Sciences (IGGCAS), and conducted two years post-doctor research at IGGCAS from September 2013 to December 2015. Since January 2016, he became a senior research fellow at IGGCAS. His research interest is mainly focus on using in situ microanalysis to constrain the detailed petrogenesis and metallogenesis of porphyry Cu deposits from Central Asian Orogenic Belts, Tibet, and Baguio district (Philippine).