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May 18 - 21, 2020

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Eocene Tectonics, Magmatism, and Metallogeny: From Squeeze to Ease

Chairs

Curtis Johnson – curtisj@nevada.unr.edu

Mike Ressel – mressel@unr.edu

The Eocene time period in the Great Basin marks a dramatic shift from compressional to extensional tectonics, coupled with the onset of voluminous subduction-related magmatism. These geologic changes are intimately and complexly linked with the regions world-class metal endowment. In this session, we review the key geologic aspects of the Great Basin in the Eocene and highlight recent work helping us understand the important relationship between tectonics, magmatism, and metallogeny.

Carlin-type & Carlin-like Deposits

Chairs

Marcus Johnston – apexmineralresources.com

Mike Ressel – mressel@unr.edu

Intrusion-related Deposits

Chairs

Eric Seedorf – seedorff@email.arizona.edu

New Technologies for Exploration

Chairs

Advanced Projects: From Drillhole To Blasthole, New Mine Development In The Western US

Chairs

Chad Peters – cpeters@ridgelineminerals.com

Mike Harp – m.harp@goldstandardv.com

The Western US is the largest metal producing region in the United States and remains one of the most prospective jurisdictions for continued discovery in North America. Despite difficult market conditions between 2012-2018, many companies have successfully advanced their projects from discovery through development, emphasizing robust economics and margin instead of growth. Here we showcase a selection of successful development stories, focusing on the evolution of the geologic model through drilling and the subsequent hurdles faced as each project transitioned from advanced exploration to mine development.

Strategic & Critical Minerals

Chairs

Patricia Capistrant – plcapistrant@gmail.com

Molly Hunsaker – mollymariehunsaker@gmail.com

Environment & Exploration

Chairs

Jeff Parshley – jparshley@srk.com

Exploration Geochemistry: Applications in Covered Settings

Chairs

Clark Smith –

Wade Hodges –

Epithermals II. Low Sulfidation – Odin Christensen

Chairs

Odie Christensen – rocksnpots@gmail.com

Exploration Geochemistry

Chairs

Mary Doherty – mary.doherty@newmont.com

High Sulfidation Precious Metal Deposits: Recent Global Discoveries and Great Basin Analogs

Chairs

Carlin on the Edge: Off-trend Deposits and Concepts

Chairs

Moira Smith – msmith@libertygold.ca

Rumors from the Bush

Chairs

Pete Dilles – padilles56@gmail.com

My intent here is to have presenters talk about how at least three significant H.S. deposits, two of which are well on their way to being mined, were found and formed. Hopefully the speakers can be persuaded to talk about the unique exploration challenges each deposit presented. In the second half of the session I would like to bring on the Great Basin analog H.S. deposit presenters to include GORO on the Isabella-Pearl deposit/mine.

Mineral Textures as Ore Vectors

Chairs

Anthony Gesualdo – anthony.gesualdo@gmail.com

Mike Ressel – mressel@unr.edu

Best Practices and Innovations in Geological Modeling and Mineral Resource Estimation

Chairs

Doug Reid – douglas.reid@woodplc.com

Abani Samal – arsamal@gmail.com

The session invites presentations on drill hole data interpretation and geological modeling, using geological modeling in resource estimation. The speakers are encouraged to discuss advantages of various techniques used in resource estimation. Presentations on reporting mineral resources using NI-43-101 or similar guidelines will also be considered. Examples from Nevada and basin and range provinces should be used.

Exploration Geophysics

Chairs

Jim Wright – wrightgeophysics@frontiernet.net

Chet Lide – chet.lide@zonge.com

Metal deposits of the Walker Lane: new developments in old districts

Chairs

pvikre@usgs.gov

Influence of Mesozoic Deformation on the Localization of Tertiary Precious-metal Deposits in the Northern Great Basin

Chairs

USGS/State Surveys

Sandra Wyld – swyld2@gmail.com

Dave Rhys – panterra@shaw.ca

Doug Prihar – dprihar@pershinggold.com

As a continuation of concepts from talks in Part 1 of this session, Part 2 aims to convey the inherited structural controls which Mesozoic fold-thrust patterns impart on the location, architecture and structural style of younger Carlin and epithermal deposits in the northern Great Basin. The talks will benefit from the new exposures and exploration data that have been acquired during recent exploitation and exploration of these deposits.

Advances in Understanding Mesozoic Tectonism and Structural Relations Across the Northern Great Basin

Chairs

USGS/State Surveys

Sandra Wyld – swyld2@gmail.com

Dave Rhys – panterra@shaw.ca

Doug Prihar – dprihar@pershinggold.com

The timing, distribution, and extent of Mesozoic (Jurassic-Cretaceous) deformation in the northern Great Basin is a matter of dispute and uncertainty in many areas. In particular, recent studies have documented that Jurassic shortening structures are more widespread than previously recognized in north-central and northeast Nevada. Establishing a more defined history of Mesozoic deformation across this region has implications both for the tectonic history and the localization of younger Carlin and epithermal deposits (see part 2 of this session).

Basin & Range Roundup I

Chairs

USGS/State Surveys

dfrank@usgs.gov

andrewrupke@utah.gov

Basin & Range Roundup II

Chairs

Cordilleran Geology & Tectonics

Chairs

Andrew Zuza – azuza@unr.edu