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  1.  25
    Inversion of Airborne Geophysics Over the DO-27/DO-18 Kimberlites — Part 3: Induced Polarization.Seogi Kang, Dominique Fournier & Douglas W. Oldenburg - 2017 - Interpretation: SEG 5 (3):T327-T340.
    The geologically distinct DO-27 and DO-18 kimberlites, often called the Tli Kwi Cho kimberlites, have been used as a testbed for airborne geophysical methods applied to kimberlite exploration. This paper focuses on extracting chargeability information from time-domain electromagnetic data. Three different TEM surveys, having similar coincident-loop geometry, have been carried out over TKC. Each records negative transients over the main kimberlite units and this is a signature of induced polarization effects. By applying a TEM-IP inversion workflow to a versatile time (...)
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  2.  16
    Inversion of Airborne Geophysics Over the DO-27/DO-18 Kimberlites — Part 2: Electromagnetics.Dominique Fournier, Seogi Kang, Michael S. McMillan & Douglas W. Oldenburg - 2017 - Interpretation: SEG 5 (3):T313-T325.
    We focus on the task of finding a 3D conductivity structure for the DO-18 and DO-27 kimberlites, historically known as the Tli Kwi Cho kimberlite complex in the Northwest Territories, Canada. Two airborne electromagnetic surveys are analyzed: a frequency-domain DIGHEM and a time-domain VTEM survey. Airborne time-domain data at TKC are particularly challenging because of the negative values that exist even at the earliest time channels. Heretofore, such data have not been inverted in three dimensions. In our analysis, we start (...)
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  3.  22
    Inversion of Airborne Geophysics Over the DO-27/18 Kimberlites, Part III: Induced Polarization.Seogi Kang, Dominique Fournier & Douglas W. Oldenburg - forthcoming - Interpretation: SEG:1-48.
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  4.  2
    Inversion of Airborne Geophysics Over the DO-27/DO-18 Kimberlites — Part 1: Potential Fields.Sarah G. R. Devriese, Kristofer Davis & Douglas W. Oldenburg - 2017 - Interpretation: SEG 5 (3):T299-T311.
    The Tli Kwi Cho kimberlite complex contains two pipes, called DO-27 and DO-18, which were discovered during the Canadian diamond exploration rush in the 1990s. The complex has been used as a testbed for ground and airborne geophysics, and an abundance of data currently exist over the area. We have evaluated the historical and geologic background of the complex, the physical properties of interest for kimberlite exploration, and the geophysical surveys. We have carried out 3D inversion and joint interpretation of (...)
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  5.  42
    To: “Inversion of Airborne Geophysics Over the DO-27/DO-18 Kimberlites — Part 3: Induced Polarization,” Seogi Kang, Dominique Fournier, and Douglas W. Oldenburg, Interpretation, 5, No. 3, T327–T340, Doi: 10.1190/INT-2016-0141.1. [REVIEW]Seogi Kang, Dominique Fournier & Douglas W. Oldenburg - 2017 - Interpretation: SEG 5 (4):Y1-Y1.
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    Joint Inversion of Potential-Fields Data Over the DO-27 Kimberlite Pipe Using a Gaussian Mixture Model Prior.Thibaut Astic, Dominique Fournier & Douglas W. Oldenburg - 2020 - Interpretation 8 (4):SS47-SS62.
    We have carried out petrophysically and geologically guided inversions to jointly invert airborne and ground-based gravity data and airborne magnetic data to recover a quasi-geology model of the DO-27 kimberlite pipe in the Tli Kwi Cho cluster. DO-27 is composed of three main kimberlite rock types in contact with each other and embedded in a granitic host rock covered by a thin layer of glacial till. The pyroclastic kimberlite, which is diamondiferous, and the volcanoclastic kimberlite have anomalously low density, due (...)
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