Geology Seminar Series - 2017-2018 Howard Street Robinson Lecturer - Dr. Peter Hollings

Event Date: 
Monday, February 26, 2018 - 10:30am
Event Location: 
CB 3031
Event Contact Name: 
Dr. Shannon Zurevinski
Event Contact Phone: 
(807) 343-8015
Event Contact E-mail: 
shay@lakeheadu.ca

Geology Department Seminar Series Presents
Geological Association of Canada
2017-2018 Howard Street Robinson Medal Winner
and Lecturer

DR. PETER HOLLINGS
Professor and Chair, Department of Geology
Director, Centre of Excellence for Sustainable Mining and Exploration
Lakehead University

 "Using igneous petrology to unravel the tectonic triggers for porphyry mineralization" 

Monday, February 26, 2018
10:30am in CB 3031

Abstract:
Recent studies of the magmatic rocks associated with porphyry systems in both continental and island arc environments has shown that the geochemistry of the pre-and syn-mineralization rocks shows systematic variations that can be attributed in some cases to the subduction of aseismic ridges. The role of ridge subduction, either as a source of metals or simply as a cause of flattening and compression, remains to be determined but the fact that ridge subduction is linked to the majority of recent giant porphyry Cu-Mo-Au systems suggests they play a critical role. This talk will examine the evidence for the effects and impact of ridge subduction in Chile and the Philippines.

The Cretaceous to middle Miocene volcanic rocks of Central Chile, host to some of the world’s largest Cu-porphyry deposits, are characterized by enriched LREE and negative Nb anomalies, consistent with an arc setting. The geochemical signature of these rocks remains more or less constant until the Late Miocene when a rapid change in the geochemical signature between the end of the eruption of the Farellones Formation and the eruption of the high La/Yb La Copa Rhyolite Complex implies a more abrupt change in the tectonic environment. The subduction of the Juan Fernández Ridge may have been the key geodynamic process responsible for the genesis of the three middle Miocene to lower Pliocene giant porphyry copper deposits in central Chile, possibly by promoting crustal-scale faulting and even acting as a source of metals. 

The Baguio district of the Philippines is one of the world’s premier mineral provinces, containing >35 million ounces (Moz) of gold and 2.7 million metric tons (Mt) of copper in epithermal, porphyry, and skarn deposits that formed in the last 3.5 m.y. The geochemical and isotopic characteristics of the Pliocene and Pleistocene magmatic rocks of the Baguio district are characteristic of primitive mantle-derived melts that underwent minimal crustal contamination prior to emplacement. In contrast, the intermediate to felsic suite has been contaminated by young arc crust, suggesting ponding and fractionation within shallow-crustal magma chambers. The early mafic suite is broadly coeval with the onset of subduction of the Scarborough Ridge and slab flattening. The young aseismic ridge would have been more susceptible to melting than the downgoing plate and those melts may explain the isotopic recharge of the Pliocene subarc mantle as well as the generation of the primitive melts and adakitic rocks found within the Baguio district. The interaction between primitive mafic melts and the more felsic calc-alkaline rocks has generated fertile melts that were highly productive for porphyry copper and epithermal gold mineralization. Evidence for this interaction is preserved in hornblendes from the Black Mountain Southeast Cu-Au-(Mo) porphyry deposit. The hornblendes can be divided into two groups: one formed at depth in a mafic magma and the other at shallower levels in a felsic magma. The presence of both groups within a single sample suggests mixing of mafic and felsic magma, consistent with the recharge indicated by the district scale whole rock geochemistry. Porphyry mineralization in the Black Mountain area is interpreted to have formed as a result of underplating of a felsic magma chamber by a mafic magma that formed as a result of mantle recharge related to the subduction of the aseismic Scarborough Ridge.

BIO:  Dr. Hollings completed his Ph.D. at the University of Saskatchewan in 1998 where he investigated the geochemistry of the 2.7-3.0 Ga Uchi Subprovince from Red Lake to Pickle Lake. During a two-year NSERC funded postdoctoral fellowship at CODES Dr. Hollings participated in a multi-disciplinary research project investigating the genesis of giant copper-porphyry deposits in Chile. As a faculty member at Lakehead University since 2001, Dr. Hollings is continuing his research into the relationship between igneous petrogenesis and mineralisation in Northwestern Ontario, the Philippines and S America. He has published more than 75 peer-reviewed papers on these topics. Hollings is currently the Chair of the Department of Geology and Director of the Centre of Excellence for Sustainable Mining and Exploration, both at Lakehead University. He was appointed an Associate Editor of Mineralium Deposita in 2017.

Campus: 

Geology Thesis Seminars 2018 - Progress Reports Presented by E. Gorner and N. Derome

Event Date: 
Monday, February 12, 2018 - 10:30am
Event Location: 
CB 3031
Event Contact Name: 
Dr. Shannon Zurevinski
Event Contact E-mail: 
shay@lakeheadu.ca

THE DEPARTMENT OF GEOLOGY GRADUATE THESIS SEMINARS 2018
Progress Reports Presented By:

EMILY GORNER
"Alteration mineral chemistry of the Hemlo Au deposit"

NICOLAS DEROME
"Alteration mineral chemistry of the Red Lake Au deposit"

click here for poster  

MONDAY, FEBRUARY 12th
10:30 am
CB 3031

Campus: 

Geology Thesis Seminar 2018 Progress Report presented by V. Smith

Event Date: 
Monday, February 5, 2018 - 10:30am
Event Location: 
CB 3031
Event Contact Name: 
Dr. S. Zurevinski
Event Contact E-mail: 
shay@lakeheadu.ca

THE DEPARTMENT OF GEOLOGY GRADUATE THESIS SEMINARS 2018
Progress Report Presented By:

VITTORIA SMITH
“Isotopic systematics of the Ghost Lake Batholith, ON"

click here for poster 

MONDAY, FEBRUARY 5th
10:30 am
CB 3031

Campus: 

Geology Thesis Seminar 2018 Progress Reports presented by J. Vrzovski and K. Arnold

Event Date: 
Monday, January 29, 2018 - 10:30am
Event Location: 
CB 3031
Event Contact Name: 
Dr. Shannon Hay
Event Contact E-mail: 
shay@lakeheadu.ca

THE DEPARTMENT OF GEOLOGY GRADUATE THESIS SEMINARS 2018
Progress Reports Presented By:

JOSEPH VRZOVSKI
"Alteration mineral chemistry of the Hemlo Au district"

KIRA ARNOLD
"Geology and geochemistry of Terrace Bay Batholith, N. Ontario"
click here for poster 
MONDAY, JANUARY 29th
10:30 am
CB 3031

Campus: 

Geology Seminar Series 2018 - Guest Speaker Victoria Stinson presents "Kenorland: The Finale"

Event Date: 
Monday, January 22, 2018 - 10:30am
Event Location: 
CB 3031
Event Contact Name: 
Dr. Shannon Zurevinski
Event Contact E-mail: 
shay@lakeheadu.ca

GEOLOGY DEPARTMENT 2017-2018 SEMINAR SERIES 

Guest Speaker:

VICTORIA STINSON
PhD Candidate, University of Saskatchewan
Contract Lecturer, Lakehead University

"Kenorland:  The Finale"

Monday, January 22nd
10:30 a.m.
CB 3031

Campus: 

Geology Department Graduate Seminars 2018 - Thesis Proposal Presentations by C. Boucher and S. Kurucz

Event Date: 
Monday, January 15, 2018 - 10:30am
Event Location: 
CB 3031
Event Contact Name: 
Dr. S. Hay
Event Contact E-mail: 
shay@lakeheadu.ca

THE DEPARTMENT OF GEOLOGY GRADUATE THESIS SEMINARS 2018
Thesis Proposal Presentations By:

CHANELLE BOUCHER
"Geochemistry of komatiites in the Lake of the Woods greenstone belt"

SOPHIE KURUCZ
"The Quirk Lake Group:  A Huronian Paleoproterozoic Possible
Snowball Earth Event"

click here for poster 

MONDAY, JANUARY 15th
10:30 am
CB 3031

Campus: 

Geology Department Thesis Defense by D. Nikkila - December 11, 2017 at 11:00am

Event Date: 
Monday, December 11, 2017 - 11:00am
Event Location: 
CB 3031
Event Contact Name: 
Dr. S. Zurevinski
Event Contact E-mail: 
shay@lakeheadu.ca

DEPARTMENT OF GEOLOGY
Thesis defense presented by:

DOUGLAS NIKKILA
Master of Science in Geology Candidate

The mineralogy and petrology of layered series nepheline syenite within Centre II of the Coldwell Complex

Monday, December 11, 2017
11:00 am
CB 3031

Campus: 

GEOLOGY GRADUATE THESIS SEMINARS 2017 - MSc Thesis Proposal Presentations by M. Afroz and J. J. Savard

Event Date: 
Thursday, November 23, 2017 - 12:00pm
Event Location: 
CB 3031
Event Contact Name: 
Dr. S. Zurevinski
Event Contact E-mail: 
shay@lakeheadu.ca

THE DEPARTMENT OF GEOLOGY GRADUATE THESIS SEMINARS 2017
MSc Thesis Proposal Presentations By:

MUNIRA AFROZ
"Sedimentology and geochemistry of basinal facies of 2.94Ga Red Lake Carbonate Platform"

JOHNATHON JAMES SAVARD
"Petrology of ijolites from the Prairie Lake Carbonatite Complex"

 click here for poster 

 THURSDAY, NOVEMBER 23rd, 2017 
12:00 noon
 
CB 3031

Campus: 

Geology Seminar Series 2017 - Report on sponsored educational field trips SIFT and SIMEW

Event Date: 
Wednesday, October 18, 2017 - 3:00pm
Event Location: 
CB 3031
Event Contact Name: 
Dr. S. Hay
Event Contact E-mail: 
shay@lakeheadu.ca

GEOLOGY DEPARTMENT 2017-2018 SEMINAR SERIES
Report on sponsored educational field trips by:

SPENCER KILLINS
 Canadian Society of Petroleum Geologists Student Industry Field Trip
(SIFT)

CHANELLE BOUCHER
Prospectors & Developers Association of Canada Student-Industry
Mineral Exploration Workshop
(SIMEW)

WEDNESDAY, OCTOBER 18, 2017
at 3:00 p.m. in CB 3031

click here for poster link

Campus: 

Geology 2017 Honours Thesis Presentations by: A. Graba and I. Arungwa

Event Date: 
Wednesday, April 5, 2017 - 10:00am
Event Location: 
CB 3031
Event Contact Phone: 
(807) 343-8461
Event Contact E-mail: 
shay@lakeheadu.ca

THE DEPARTMENT OF GEOLOGY SEMINAR SERIES
2017 HONOURS THESIS PRESENTATIONS BY:

ANDREW GRABA
"A mineralogical study of the Chipman Lake Carbonatite dykes" 

IKECHUKWU ARUNGWA
"Sedimentology and Geochemistry of a Conglomerate Carbonate Succession (2.94 Ga), Red Lake area"

click here for poster 

WEDNESDAY, APRIL 5th, 2017  
10:00 am to 11:00 am
CB 3031

GEOLOGY STUDENT GROUP PHOTO TO FOLLOW - SAME
LOCATION AS LAST YEAR - OUTSIDE OF CB DOWN
THE STEPS BY LAKE TAMBLYN

Campus: 

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