KEGS/BCGS Roundup Breakfast – Tuesday, January 24, 2017

SPEAKER: Dr. Martyn Unsworth, Professor of Geophysics, University of Alberta

TITLE: A geophysical view of mountain building: perspectives from the Andes, Himalaya and Antarctica

DATE/TIME: Tuesday, January 24, 2017

LOCATION: Fairmont Waterfront Hotel, Princess Louisa Room, Vancouver

REGISTRATION: Online at www.kegsonline.org (Deadline Jan 20, 2017)

ABSTRACT:

Geophysical imaging has proven to be a valuable tool in understanding the geological processes that occur within plate boundaries. Magnetotelluric (MT) exploration is especially useful in these studies since it can measure electrical resistivity, a rock parameter which is sensitive to the presence of fluids such as water or partial melt. In this presentation I will describe how MT has been used to study mountain building. In subduction zones, MT has defined the pathways taken by molten rock from the mantle to the surface where it is erupted by volcanoes. It has also detected some of the largest magma bodies on Earth and shown that the melt can have a high water content. The Himalaya and Tibetan Plateau were formed by the collision of the Indian and Asian plates and MT studies have imaged regions of molten rock that are sufficiently weak to flow. A final example will focus on Mount Erebus in Antarctica, where MT data are being used to image the magma system of a volcano which is not located on a plate boundary.

BCGS Technical Talk – December 15, 2016

Speaker: Gary Tipper, Skytem

Title: New generation of helicopter time domain electromagnetic systems for mineral exploration in rough terrain

Date/Time: Thursday December 15, 2016 @ 4:30pm

Location: 4th Floor Conference Room, Room 451, 409 Granville St. (UK Building at Granville and Hastings), Vancouver

Abstract:
Advances in technology for helicopter borne Time Domain Electro-Magnetic survey systems in the last 10 years has allowed the Mining industry the ability to acquire high resolution data in areas historically very difficult to access.

This presentation will focus on some of the past and ongoing technical challenges associated with survey design, drape mode versus contour mode flying, helicopter and pilot performance, technical limitations of past helicopter AEM systems and data quality issues of previous public domain BC AEM surveys.

It will show examples of past system geometry and design, claimed system dipole moments and calculations of Effective Dipole Moments (EDM), based on the wave forms of the different commercial AEM systems, and realistic depth of investigation.

It concludes with details of the new SkyTEM AEM systems for providing high resolution data in these challenging areas and recent case study of a new generation system flying in British Columbia.