Reza Tafti - EOS / UBC

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Reza Tafti
PhD-GEOL
Mineral Deposits
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EDUCATION :

2005-2011 PhD. Economic geology and geochronology. (Metallogeny, Geochronology and Tectonic Setting of the Gangdese Arc, Southern Tibet, China) University of British Columbia, Vancouver, BC, Canada

2002-2005 MSc. Economic geology and geochronology. (Nature, Age and Origin of Cu-Au mineralization at the Minto and Williams Creek Deposits, Yukon, Canada) University of British Columbia, Vancouver, BC, Canada

1999-2002 BSc. Earth and Ocean Sciences. University of British Columbia, Vancouver, BC, Canada

1986-1991 BSc. Geology. University of Isfahan, Isfahan, Iran

SCHOLARSHIPS AND OTHER AWARDS:

EOS Outstanding Teaching Assisstant Award 2004

Egil H Lorntzsen Scholarship 2002

The CIM Book Prize 2002

UBC Scholarship 2001-2002

UBC Entrance Scholarship 2000-2001

THE DR. AARO E. AHO Foundation Scholarship 2000

Dr. Philip Popove award 1999

Douglas College Dean of Science-List 3 Semesters 1999

Publications:

Papers

Tafti, R., Mortensen, J.K., Lang, J.R., Rebagliati, M., Oliver, J., 2009. Jurassic U-Pb and Re-Os ages for the newly discovered Xietongmen Cu-Au phorphyry district, Tibet: Implications for the metallogenic epochs in the southern Gangdese belt. Economic Geology 104, 127–135.

Tafti, R., and Mortensen, J.K. 2004. Early Jurassic porphyry(?) copper (-gold) deposits at Minto and Williams Creek, Carmacks Copper Belt, western Yukon. In: Yukon Exploration and Geology 2003. Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 289-303.

Mortensen, J.K. and Tafti, R., 2003. Nature and origin of copper-gold mineralization at the Minto and Williams Creek deposits, west-central Yukon: Preliminary investigations. In: Yukon Exploration and Geology 2002, D.S. Emond and L.L. Lewis (eds.), Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 175-182.

Conference Abstracts and Posters

Lang, J., Rebagliati, C.M., Oliver, J., Tafti, R., and Jonker, P., 2006. The Xietongmen Copper-Gold Deposit: A Major New Porphyry-Style Discovery in Tibet, People’s Republic of China. Extended abstract presented at the CIM Mining Conference & Exhibition - Vancouver 2006.

Tafti, R., Lang, J.R., Mortensen, J.K. and Rebagliati, C.M., 2006. Metallogeny, Geochronology and Tectonic Setting of the Gangdese Arc, Southern Tibet, China: Discovery of the Xietongmen Porphyry Copper-Gold Deposit. Poster Presentation at Exploration Roundup,Vancouver, BC, 2006.

Tafti, R. and Mortensen, J.K., 2004. Deformed Early Jurassic Porphyry Cu(-Au) Deposits at Minto and Williams Creek, Carmacks Copper Belt, Yukon. Poster Presentation at Yukon Geoscience Forum, Whitehorse, 2004.

Tafti, R. and Mortensen, J.K., 2004. Deformed Early Jurassic Porphyry Cu(-Au) Deposits at Minto and Williams Creek, Carmacks Copper Belt, Western Yukon Territory. Geological Society of America, Abstracts with Programs, Vol. 36, No. 5, p. 516.

Tafti, R. and Mortensen, J.K., 2004. Early Jurassic Intrusion-Related Cu(-Au) Mineralization at Minto and Williams Creek, Carmacks Copper Belt, Western Yukon Territory. Poster Presentation at Exploration Roundup,Vancouver, BC, 2004. (Winner of the third prize)

Tafti, R. and Mortensen, J.K., 2004. Early Jurassic Intrusion-Related Cu(-Au) Mineralization at Minto and Williams Creek, Carmacks Copper Belt, Western Yukon Territory. Poster Presentation at Western Inter-University Geology Conference, Vancouver, 2004. (Winner of the first prize)

Tafti, R. and Mortensen, J.K., 2003. Early Jurassic Intrusion-Related Cu(-Au) Mineralization at Minto and Williams Creek, Carmacks Copper Belt, Western Yukon Territory. Poster Presentation at Yukon Geoscience Forum, Whitehorse, 2003.

Tafti, R. and Mortensen, J.K., 2003. Nature, Age and Origin of Cu-Au Mineralization at the Minto and Williams Creek Deposits, Yukon: GAC-MAC-SEG Joint Annual Meeting, Vancouver 2003, Abstract with Programs, Vol. 28, Abstract number 418.

Tafti, R. and Mortensen, J.K., 2003. Investigation into the age and Origin of the Minto and Williams Creek Deposits (Carmacks Copper) Cu-Au Deposit, west-central Yukon Territory: Progress Report. Poster Presentation at Cordilleran Exploration Roundup,Vancouver, BC, 2003.

Tafti, R. and Mortensen, J.K., 2002. Nature and Origin of Cu-Au mineralization at the Minto and Williams Creek Deposits, Yukon: Progress Report. Poster Presentation at Yukon Geoscience Forum, Whitehorse, 2002

Memberships:

Student member of Society of Economic Geologists.

Member of Golden Key International Honour Society. Golden Key is an academic honour society which recognizes scholastic achievement and excellence among college and university students and grants membership to the best 15% students of each faculty.

Research Interests

My PhD thesis Description: Title: Metallogeny, Geochronology and Tectonic Setting of the Gangdese Arc, Southern Tibet, China

Abstract

The Gangdese continental arc includes both volcanic and intrusive rock types of intermediate to felsic, calc-alkalic composition, which formed during northward subduction of Neo-Tethys oceanic crust beneath the Lhasa terrane. Regional metallogeny of the Gangdese continental magmatic arc is poorly constrained due to a lack of thorough studies of ore deposits in the area. Reported dates on Gangdese plutonic activity range from 120 Ma to 30 Ma. Limited tectonic studies on the Gangdese belt indicate that known mineralization styles are typical of magmatic arc settings similar to the Andes and southwestern North America. Recent discovery of Xietongmen, a major porphyry Cu-Au deposit in the Gangdese belt, suggests that a thorough study of regional metallogeny is critical for future exploration in the Gangdese belt. The Xietongmen deposit is located about 350 km by road west-southwest of the Tibetan capital of Lhasa. The 2005 drilling program by Continental Minerals Corporation has verified excellent lateral and vertical continuity of Cu-Au mineralization over a large areal extent. This major, high-grade Cu-Au deposit is provisionally interpreted to be a porphyry-style deposit that formed during a period of syn-hydrothermal brittle-ductile deformation. Ar-Ar dating of hydrothermal sericite from volcanic host rock to Xietongmen gave an age of 47.1 (+/-0.3) Ma for alteration.

My MSc. thesis Description: Title: Nature, Age and Origin of Cu-Au mineralization at the Minto and Williams Creek Deposits, Yukon

Abstract

The Minto (tonnage and grade) and Williams Creek (Carmacks Copper; tonnage and grade) deposits represent the most significant Cu(-Au) deposits discovered thus far within the Carmacks Copper Belt of western Yukon. Mineralization consists of disseminations and stringers of chalcopyrite and bornite hosted by variably deformed Early Jurassic plutonic rocks and to a lesser extent strongly metamorphosed supracrustal rocks (“siliceous ore” and “biotite schist/amphibolite”) that are interpreted to represent mineralized and deformed metasedimentary wall rocks to the mineralized intrusive phases. Mineralization occurred prior to the ductile deformation that has affected the ore hosts, which now occur as rafts and screens of variable size within slightly younger, undeformed phases of the Granite Batholith. Previously proposed genetic models for the deposits include metamorphosed VMS, metamorphosed redbed copper, or deformed porphyry-style mineralization. Mineralized granodioritic gneiss from both deposits and post-mineralization granodiorite at Williams Creek yield U-Pb zircon ages of about 197-198 Ma and massive, post-mineralization intrusive phases yield essentially the same age. Ar-Ar dates for muscovite from selvages developed along late quartz-feldspar-epidote veins at Minto are 182-183 Ma. Al-in-hornblende geobarometry on post-mineralization intrusive phases at Minto and Williams Creek indicate that they were emplaced at a depth of >9 km. Lithogeochemical studies of both pre- and post-mineralization intrusive phases at Minto and Williams Creek indicate that they are weakly peraluminous, sub-alkaline, and formed in a continental magmatic arc setting. Pb and S isotopic studies of both deposits indicate a magmatic source for the contained metals and sulphur. Our results indicate that the two deposits are Cu(-Au) porphyry deposits that formed during the final stages of Early Jurassic arc activity and were tectonically buried and subsequently deformed and metamorphosed during the last stages the mineralization process. Cu/Au ratios and field observations show extensive supergene mobility of Cu especially at Williams Creek that has complicated earlier interpretations of the deposits.

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