Cyril on Swedish rock

Université de Genève Section des Sciences de la Terre et de l'Environnement Département de Minéralogie Rue des Maraîchers, 13 1205 Genève - Suisse phone: + 41(0)223796821

PhD project (started 2010) - Supervised by Dr. Massimo Chiaradia

Geochronological and petrologic evolution of the Coroccohuayco magmatic system and its role in the formation of the associated Cu-Au skarn and porphyry mineralization, Tintaya cluster, southern Peru. SNF funded project.

I’m currently investigating the apparent link that many porphyry related deposits have with the adakite-like signature of their intrusive rocks. I’m focussing on a detailed study of the intrusive suite at the Coroccohuayco Cu-skarn deposit located in the Eocene-Oligocene Andahuaylas-Yauri belt of southern Peru (Tintaya Cluster). In order to carry out this project I’m using a wide range of analytical techniques including U-Pb dating of zircons and titanites by LA-ICP-MS and TIMS, ⁴⁰Ar/³⁹Ar dating, Re-Os dating, geochemistry and isotopes (Sr, Nd, Pb) of rocks and minerals (XRF, LA-ICP-MS, TIMS, microprobe). In detail I'm focussing on:

• The longevity of the magmatic cycle and of the associated hydrothermal system through U-Pb dating of zircons (LA-ICP-MS and ID-TIMS), and magmatic and hydrothermal titanites (ID-TIMS) and Re-Os dating of molybdenites.
• The petrologic evolution of the magmatic system using whole rock geochemistry (XRF and LA-ICP-MS) combined with petrography and mineral geochemistry (Microprobe and LA-ICP-MS).
• Insight into petrologic evolution from zircons and titanites chemitry, texture and Hf isotopes.

• The "specialization" of high Sr/Y magmas in term of metals, volatiles and oxidation state.

• The use of zircon chemistry as a proxy to infer the relative oxidation state of magmas.

Bienvenidos a Coroccohuayco

(+)

Assistantship

My duties involve an assistant role for the “Ore Deposits” 3^rd year course and well assisting field trip dedicated to undergraduate students.

Publications

Peer review conference abstracts

C. Chelle-Michou, M. Chiaradia, G.E. Villón Durand (2011) Temporal evolution of magmatic rocks at the Coroccohuayco Cu-skarn deposit, Tintaya cluster, Peru. In F. Barra, M. Reich, E. Campos, F. Tornos (eds) Let's Talk Ore Deposits. Proccedings of the Eleventh Biennial SGA Meeting: 26-29^th Septembre 2011, Antofagasta, Chile. pp 369-371

Background

Education

2008 – Master of Science with major in exploration geosciences at Luleå University of Technology, Sweden. Masters Topic: Geology and Mineralization of the Bellviksberg Sandstone-Hosted Pb(-Zn) Deposit, Dorotea Area, Sweden. available here.

2008 – Geological engineer of the National School of Geology (ENSG) of Nancy, France

Industry Experience

2009 – Vice manager at the Monéo-Cap Bocage Mines. Oxidized Ni laterites of New-Caledonia.
Daily management of the exploitation and the 60-person staff of the centre.

Summer 2008 – Summer graduate exploration geologist at Boliden Mineral AB. Sandstone-hosted Pb-Zn and VHMS deposits exploration, Dorotea Area, Sweden.
Outcrop mapping, core logging, soil sampling, drillhole positioning and boulder tracing.

Summer 2007 – Internship at ANKERPOORT (SIBELCO Group). Prospecting for economic quartz and albitite bodies in northern Greece.