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Minerals and Allied Natural Resources and their Sustainable DevelopmentGeodynamic Context of Metallogeny

Minerals and Allied Natural Resources and their Sustainable Development: Geodynamic Context of... [Geodynamics is the dynamics of the Earth. Metallogeny is the genesis of metals, rather the metal-bearing mineral deposits. So, ‘Geodynamic context of metallogeny’ relates metallogeny to geodynamics. We generally refer to geodynamics in terms of plates and plumes, that ultimately control magmatism, sedimentation, and metamorphism and hence ore genesis in the crust-mantle system. The solid earth is made up of physically distinct layers (from surface downward) of lithosphere, asthenosphere, mesosphere, outer core, and an inner core. The lithosphere is presently divided in to seven large and a few small pieces (‘plates’). They underwent making, breaking, and remaking several times during much of the Earth’s history, giving rise to what we call supercontinents and supercycles today. Formation of mineral deposits, which are in fact products of petrogenesis of sorts, controlled by tectonics, therefore varied in time and space. Tectonic setting of mineralization are today accepted to be as follows: continental hot spot produce Cr, Ni–Pt–Cu deposits, diamonds, certain stratiform base metal deposits, and even granite-related mineralization of Sn. Constructive plate boundaries host Fe-, Mn-oxides along the rifted ridge, and also Alpine-typeTypealpine chromite deposits. Passive continental margins localize deposition of evaporitesEvaporite, phosphates, BIFsBanded Iron Formation (BIF), carbonate-hosted Pb–Zn deposits. Subduction zones produce porphyryPorphyry type Cu–Mo–(Au) deposits and may be also Cu + Au skarn deposits. Continental collision zones contain podiform chromitechromitepodiform, VMS, U and porphyry Cu deposits. Greenstone beltsGreenstone belts (ancient volcano-plutonic arcs?) are known for being the major localizer of orogenic goldGoldorogenic, komatiite-related Cu–Ni deposits and also Cu–Zn mineralizations. Intracratonic settings are credited with IOCGIOCG mineralization. Tectonically stable regions with plateau-like relief and located in tropical and sub-tropical regions are best suited for lateritization.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Minerals and Allied Natural Resources and their Sustainable DevelopmentGeodynamic Context of Metallogeny

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Publisher
Springer Singapore
Copyright
© Springer Nature Singapore Pte Ltd. 2017
ISBN
978-981-10-4563-9
Pages
293 –347
DOI
10.1007/978-981-10-4564-6_5
Publisher site
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Abstract

[Geodynamics is the dynamics of the Earth. Metallogeny is the genesis of metals, rather the metal-bearing mineral deposits. So, ‘Geodynamic context of metallogeny’ relates metallogeny to geodynamics. We generally refer to geodynamics in terms of plates and plumes, that ultimately control magmatism, sedimentation, and metamorphism and hence ore genesis in the crust-mantle system. The solid earth is made up of physically distinct layers (from surface downward) of lithosphere, asthenosphere, mesosphere, outer core, and an inner core. The lithosphere is presently divided in to seven large and a few small pieces (‘plates’). They underwent making, breaking, and remaking several times during much of the Earth’s history, giving rise to what we call supercontinents and supercycles today. Formation of mineral deposits, which are in fact products of petrogenesis of sorts, controlled by tectonics, therefore varied in time and space. Tectonic setting of mineralization are today accepted to be as follows: continental hot spot produce Cr, Ni–Pt–Cu deposits, diamonds, certain stratiform base metal deposits, and even granite-related mineralization of Sn. Constructive plate boundaries host Fe-, Mn-oxides along the rifted ridge, and also Alpine-typeTypealpine chromite deposits. Passive continental margins localize deposition of evaporitesEvaporite, phosphates, BIFsBanded Iron Formation (BIF), carbonate-hosted Pb–Zn deposits. Subduction zones produce porphyryPorphyry type Cu–Mo–(Au) deposits and may be also Cu + Au skarn deposits. Continental collision zones contain podiform chromitechromitepodiform, VMS, U and porphyry Cu deposits. Greenstone beltsGreenstone belts (ancient volcano-plutonic arcs?) are known for being the major localizer of orogenic goldGoldorogenic, komatiite-related Cu–Ni deposits and also Cu–Zn mineralizations. Intracratonic settings are credited with IOCGIOCG mineralization. Tectonically stable regions with plateau-like relief and located in tropical and sub-tropical regions are best suited for lateritization.]

Published: Jun 21, 2017

Keywords: Geodynamics; Lithospheric plates; Plumes; Continental hot spots; Subduction; Greenstone belts; Supercontinents; Supercycles; Metallogenic provinces; Collision-type metallogeny; SEDEX-type mineralization; IOCG mineralization

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