Structural framework and geodynamic evolution of the Au-rich El Indio Belt, Chile-Argentina: a Mineral System case study

Constanza Jara Barra

doi:10.26182/jn0k-8a26

Structural framework and geodynamic evolution of the Au-rich El Indio Belt, Chile-Argentina: a Mineral System case study

Constanza Jara Barra

School of Earth Sciences

Research output: Thesis › Doctoral Thesis

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Abstract

The El Indio Belt (EIB) is a gold-rich province in the Andes Cordillera (Chile-Argentina), hosting >50 Moz Au in Upper Miocene phreatomagmatic and vein-type HS to LS epithermal deposits. This investigation focuses on the determination of the regional controls on the location of large Au deposits. By means of the integration of regional and detailed structural mapping, zircon Hf-O isotopes and geophysical interpretation, this study demonstrates that large Au concentrations result from the interaction of a favorable tectonostratigraphic architecture, geodynamic trigger, and fertile magmas. It confirms that the Mineral Systems hypothesis is applicable to this Au-endowed segment of the Andes.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Fiorentini, Marco, Supervisor Miller, John, Supervisor Winocur, Diego , Supervisor, External person
Award date	18 Oct 2021
DOIs	https://doi.org/10.26182/jn0k-8a26
Publication status	Unpublished - 2021

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Embargoed from 01/12/2021 to 20/10/2023. Made publicly available on 20/10/2023.

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10.26182/jn0k-8a26

THESIS - DOCTOR OF PHILOSOPHY - JARRA BARRA, Constanza Helena - 2021 - Part 1
THESIS - DOCTOR OF PHILOSOPHY - JARRA BARRA, Constanza Helena - 2021 - Part 2
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Cite this

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title = "Structural framework and geodynamic evolution of the Au-rich El Indio Belt, Chile-Argentina: a Mineral System case study",

abstract = "The El Indio Belt (EIB) is a gold-rich province in the Andes Cordillera (Chile-Argentina), hosting >50 Moz Au in Upper Miocene phreatomagmatic and vein-type HS to LS epithermal deposits. This investigation focuses on the determination of the regional controls on the location of large Au deposits. By means of the integration of regional and detailed structural mapping, zircon Hf-O isotopes and geophysical interpretation, this study demonstrates that large Au concentrations result from the interaction of a favorable tectonostratigraphic architecture, geodynamic trigger, and fertile magmas. It confirms that the Mineral Systems hypothesis is applicable to this Au-endowed segment of the Andes.",

keywords = "El Indio Belt, High Sulphidation, Mineral systems, Gold, Geodynamic, Structural Architecture",

author = "{Jara Barra}, Constanza",

year = "2021",

doi = "10.26182/jn0k-8a26",

language = "English",

school = "The University of Western Australia",

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AU - Jara Barra, Constanza

PY - 2021

Y1 - 2021

N2 - The El Indio Belt (EIB) is a gold-rich province in the Andes Cordillera (Chile-Argentina), hosting >50 Moz Au in Upper Miocene phreatomagmatic and vein-type HS to LS epithermal deposits. This investigation focuses on the determination of the regional controls on the location of large Au deposits. By means of the integration of regional and detailed structural mapping, zircon Hf-O isotopes and geophysical interpretation, this study demonstrates that large Au concentrations result from the interaction of a favorable tectonostratigraphic architecture, geodynamic trigger, and fertile magmas. It confirms that the Mineral Systems hypothesis is applicable to this Au-endowed segment of the Andes.

AB - The El Indio Belt (EIB) is a gold-rich province in the Andes Cordillera (Chile-Argentina), hosting >50 Moz Au in Upper Miocene phreatomagmatic and vein-type HS to LS epithermal deposits. This investigation focuses on the determination of the regional controls on the location of large Au deposits. By means of the integration of regional and detailed structural mapping, zircon Hf-O isotopes and geophysical interpretation, this study demonstrates that large Au concentrations result from the interaction of a favorable tectonostratigraphic architecture, geodynamic trigger, and fertile magmas. It confirms that the Mineral Systems hypothesis is applicable to this Au-endowed segment of the Andes.

KW - El Indio Belt

KW - High Sulphidation

KW - Mineral systems

KW - Gold

KW - Geodynamic

KW - Structural Architecture

U2 - 10.26182/jn0k-8a26

DO - 10.26182/jn0k-8a26

M3 - Doctoral Thesis

ER -

Structural framework and geodynamic evolution of the Au-rich El Indio Belt, Chile-Argentina: a Mineral System case study

Abstract

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