none 10.1190/tle42040237.1 Society of Exploration Geophysicists Society of Exploration Geophysicists 186 146687437 5980 2025120911241291700 10.1190 2025-12-09T16:24:24Z 2023-04-03T14:58:25Z 2 The Leading Edge 1070-485X 04 2023 04 01 2023 42 4 Blake Cross 1 Condor Consulting Inc., Lakewood, Colorado, USA. E-mail: blake@condorconsult.com; hannah@condorconsult.com. http://orcid.org/0000-0002-1726-6433 Hannah Peterson 1 Condor Consulting Inc., Lakewood, Colorado, USA. E-mail: blake@condorconsult.com; hannah@condorconsult.com. Abstract Historical exploration for economic nickel (Ni) mineralization has often targeted magmatic sulfide deposits in extensional settings. However, convergent-margin-hosted Alaskan-type complexes represent a potentially underexplored source of Ni. Case studies of the geophysical responses associated with two magmatic Ni deposits (one is typical, and one is associated with an Alaskan-type complex) are presented, and the results are compared. Data were assessed from historical and newly acquired airborne geophysical surveys that were collected over the Mayville property in southeast Manitoba and the Turnagain property in northern British Columbia. The properties were explored by Mustang Minerals Corporation and Giga Metals Corporation, respectively. Airborne electromagnetic (EM) and magnetic data were utilized to compare the two properties and the mineralized zones. The review showed that the Mayville magmatic sulfide deposit was directly detectible with EM methods, and the passive and active-source methods were complementary to one another. The EM data did not directly detect the Turnagain Alaskan-type deposit, but the magnetics data proved to be successful in defining the geologic framework. Implications for future targeting and exploration for economic Ni mineralization are considered. 04 2023 04 01 2023 237 244 1 10.1190/crossmark-policy library.seg.org true 2023-04-03 10.1190/tle42040237.1 https://pubs.geoscienceworld.org/tle/article/42/4/237/621584/A-comparison-of-airborne-geophysical-data-over-two https://pubs.geoscienceworld.org/seg/tle/article-pdf/42/4/237/5812672/tle42040237.1.pdf https://pubs.geoscienceworld.org/seg/tle/article-pdf/42/4/237/5812672/tle42040237.1.pdf https://pubs.geoscienceworld.org/tle/article/42/4/237/621584/a-comparison-of-airborne-geophysical-data-over-two 9178 report on airborne geophysical ZTEM and magnetic survey for Mustang Minerals Corporation 2010 Report on an airborne geophysical survey for Mustang Minerals Corporation, project 536 2005 Chromite occurrences of the E-Ext stripped outcrop, Mayville intrusion, Bird River Greenstone Belt, southeastern Manitoba 2015 Nickel — Mineral profile 2008 U.S. Geological Survey releases 2022 list of critical minerals 2022 Report on the 2004 exploration program including revised estimates of indicated and inferred mineral resources: Turnagain nickel property: Province of British Columbia 2005 Geology of an ultramafic complex on the Turnagain River, northwestern BC 1975 Technical report on the preliminary economic assessment of the combined Mayville-Makwa project, Manitoba, Canada, Ni 43-101 report 2014 Geophysics for the mineral exploration geoscientist 2014 10177 report on airborne geophysical survey for Mustang Minerals Corporation 2010 Geological Survey of Canada, map 1907A 1998 Geology, Cry Lake, British Columbia Preview 195 36 2018 Minerals geophysics Origin of Cu-PGE-rich sulphide mineralization in the DJ/DB zone of the Turnagain Alaskan-type intrusion, British Columbia 2017 Review of geophysical technology for Ni-Cu-PGE deposits 2007 Geophysics 61 2 394 1996 10.1190/1.1443968 3-D inversion of magnetic data Geological fieldwork 1997: A summary of field activities and current research 18-1 1998 Ni-Cu sulfide mineralization in the Turnagain Alaskan-type complex: A unique magmatic environment Geological fieldwork 1987: A summary of field activities and current research 281 1988 Alaskan-type ultramafic rocks in British Columbia — New concepts of the structure of the Tulameen complex Geology and geochronology of the Turnagain ultramafic-mafic intrusion 2017 Geophysics for nickel-copper deposits: Where are we at and where are we going? 2016 The challenge of finding new mineral resources: Global metallogeny, innovative exploration, and new discoveries 437 2010 A new perspective on exploration for magmatic sulfide-rich Ni-Cu-(PGE) deposits Report on a helicopter-borne AeroTEM II electromagnetic and magnetometer survey, aeroquest job # 04023 Turnagain project for Hard Creek Nickel Corporation 2005 Age and origin of the Turnagain Alaskan-type intrusion and associated Ni-sulphide mineralization, north-central British Columbia, Canada 2007 Geological fieldwork 2004: A summary of field activities and current research 167 2005 New observations on the geology of the Turnagain Alaskan-type ultramafic intrusive suite and associated Ni-Cu-PGE mineralization, British Columbia Magmatic sulfide-rich nickel-copper deposits related to picrite and (or) tholeiitic basalt dike-sill complexes 2010 Geochemistry, Geophysics, Geosystems 9 7 2008 Geochemical constraints on the origin of sulfide mineralization in the Duke Island complex, southeastern Alaska 43-101 technical report and preliminary economic assessment for the Turnagain project - amended 2020 Exploring for nickel in the 90s, or ‘til depth us do part’ 1997 Geophysical interpretation report on magnetic and induced polarization/resistivity surveys, Turnagain project, Liard Mining Division, Dease Lake, BC for Canadian Metals Exploration Ltd., Geological Survey branch assessment report 2003 The Mayville mafic-ultramafic intrusion in the Neoarchean Bird River Greenstone Belt, southeastern Manitoba (part of NTS 52L12): Preliminary geochemical investigation and implication for PGE-Ni-Cu-(Cr) mineralization 2011