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Major Gold Deposit Types and Exploration process
gold exploration, important geophysical advances include airborne gravity, routine 3D inversions of potential field data, and 3D modeling of electrical data. ... infrared spectroscopy has significantly improved alteration mapping around gold systems, extending the dimensions of the footprints and enhancing vectoring capabilities. Conventional ...
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Orogenic gold and the mineral systems approach
The role of systems in metallogenic debates—orogenic gold deposits. 3.1. Orogenic gold—a single class of epigenetic precious metal deposit. As our understanding of tectonic settings improves and new techniques allow us to dissect cratons and orogens, there has been an increase in the number of models of mineralization.
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Geochemistry of hydrothermal gold deposits: A review
Hydrothermal alteration provides a significant guide to mineral exploration, as many deposits are characterized by wide alteration haloes and zonations, such as those observed in porphyry systems (Fig. 1) and chlorite–sericite alterations in the basement of volcanogenic massive sulfide deposits.These deposits are characterized by well …
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Gold in porphyry copper deposits: its abundance and fate
1.. IntroductionPorphyry copper deposits contain up to 100 t of gold and are among the largest reservoirs of gold in the upper crust (Kerrich et al., 2000).They are commonly surrounded by deposits and country rock containing gold that is thought to have been derived from them (Jones, 1992).Gold can be removed from porphyry copper …
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Models and Exploration Methods for Major Gold Deposit Types
For gold exploration, important geophysical advances include airborne gravity, routine 3D inversions of potential field data, and 3D modeling of electrical data. Improved satellite-, airborne - and field-based infrared spectroscopy has significantly improved alteration mapping around gold systems, extending the dimensions of the footprints
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Mineral potential modelling of orogenic gold systems in the …
A two-phase FIS was utilized in this study (Fig. 5), capable of combining the various exploration predictor maps representing the mappable processes of orogenic gold systems in the GTO (Table 1). During the first phase, individual FIS were developed for each of the pivotal components, including metallogenic trends, lower crustal pathways, …
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Global gold exploration: Eight companies on the move
Westhaven Gold (TSXV: WHN) is exploring for gold at its 176.2-sq.-km road-accessible Shovelnose project at the southern edge of the Spences Bridge gold belt in British Columbia, 30 km south of Merritt. The company sees potential for a low-sulphidation epithermal system at the site. Drilling completed …
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The geological characteristics, geochemical signature and …
3 Adjunct Research Fellow, Centre of Exploration Targeting, School of Earth Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia [email protected] ... (gold) systems are discussed in this extended abstract. The first of these systems is characterized by early, high-temperature magnetite and ...
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Geophysical exploration for epithermal gold deposits
This book describes the history of mineral exploration and discovery in Indonesia over the past 25 years (1993-2017). During this period ('Period II') porphyry copper-gold, high- to low-sulfidation epithermal gold-silver, nickel laterite, and bauxite were the main deposit types targeted. Several other styles of mineralisation were found ...
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Major Gold Deposit Types and Exploration process
the discovery of new gold deposits. The objectives of this paper are to provide an update on gold deposit models, and what new approaches and techniques can now be used to …
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Geophysical signatures of the gold rich porphyry copper deposits: A
Automatic identification of responses from porphyry intrusive systems within magnetic data using image analysis. Journal of Applied Geophysics, 74(4): 255–262. Hoschke, T.G., 2011. Geophysical Signatures of Copper-gold Porphyry and Epithermal Gold Deposits, and Implications for Exploration.
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REDUCED INTRUSION-RELATED GOLD SYSTEMS …
These gold systems have only been recognized as a new deposit class since 1999 and, as such, are in a juvenile state ... exploration and Au deposit discoveries in the 1990s in Alaska (USA) and ...
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A scale-integrated exploration model for orogenic gold deposits …
This orogenic gold mineral system can be applied to conceptual exploration by first identifying the required settings at geodynamic to deposit scales. Within these settings, it is then possible to define the critical gold mineralization processes in the system: fertility, architecture, and preservation.
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Towards a universal model for orogenic gold systems: A …
Despite the common characteristics of orogenic gold systems, there has been ongoing controversy concerning their genesis, as summarized by Goldfarb and Groves (2015).Early syngenetic and shallow-level crustal models (Hutchinson and Burlington, 1984; Saager et al., 1982) were soon replaced by persistent crustal metamorphic models that …
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A Historical Overview of the Past Three Decades of Mineral Exploration
This paper provides an overview of the history of advances in mineral exploration technology over the past thirty years—the 1990s, the 2000s and the 2010s—divided into the following categories: (1) theoretical advances in economic geology, i.e., the target model itself; (2) breakthroughs in the methods or technologies for …
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2.7 Orogenic mineral system | Geoscience Australia
The orogenic mineral system (Figure 2.7.1) unites a diverse group of mineral deposits that form during orogenesis, and include lode gold and Cobar-type Cu-Au-Zn-Pb-Ag deposits. These deposits form in response to major orogenic events caused by accretion or changes in subduction direction or dip. In many cases, the deposit form during short ...
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Integration of Geological Datasets for Gold Exploration in Nova …
The GIS uses a quadtree structure, ideally suited to a mixture of polygonal-thematic (e.g., geological maps) and continuous "grey-scale" (e.g., remote sensing, airborne geophysics) raster images. The goal of the study was to create a map showing areas favorable for gold mineralization, based on the distribution of 70 known gold occurrences.
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(PDF) Gold Potential Mapping using Remote Sensing and GIS at …
Remote Sensing and Geographic Information System (GIS) have played an active role in mineral exploration by helping in the identification or discovery of new gold deposits in most part of the ...
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(PDF) Epithermal gold for explorationists
This paper is a work in progress based upon my experiences in the exploration for, and evaluation of, ... base metal gold systems (Leach and Corbett, 1994; Corbett and Leach, 1998) by the general ...
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An introduction to Recent Advances in Understanding …
Recent Advances in Understanding Gold Deposits: from Orogeny to Alluvium: the importance of multi-method approaches and developing a characterization. Authors: Taija Torvela, Rob Chapman, and James …
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Top Gold exploration companies | VentureRadar
Top Gold exploration Companies Top ranked companies for keyword search: Gold AND exploration Search exact phrase instead: "Gold exploration" Export PERPETUA …
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Learning and Expertise in Mineral Exploration Decision-Making: …
Traditionally, mineral exploration has followed a predominantly empirical approach, which initially entails searching for evidence of mineralisation upon the surface of the planet, then, with consideration of known deposit types, targeting drilling to define the extent of an ore body below the surface [].As outcropping deposits in well-explored areas …
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Frontiers | Identifying the source of gold geochemical anomalies …
However, it has been known little about the relationship between the occurrence of gold nanoparticles and their geochemical anomaly in multimedia accommodating to the detailed process of gold mineralization system and geochemical exploration. Micro- to nanoscale gold as nanoparticles are related to the hydrothermal …
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Exploration information systems
Section snippets Exploration information systems (EIS) Information systems help to organise, visualise and analyse data and to convert raw data into useful information with the overall goal of supporting and improving decision making (Grabowski et al., 2014, Laudon and Laudon, 2014) (Table 1). One such example most geoscientists would be …
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Satellite Imagery and Gold Exploration (Updated 2023)
May. 17, 2023 01:45PM PST Gold Investing Advancements in satellite imagery have made it easier for exploration companies to collect vast amounts of data …
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Exploration Geology Course on How are Mineral Deposits Formed
Here is a " how " series on ore mineral deposit formation acting as a FREE Online Exploration Geology Courses to help non-technical people understand ore deposits, how they form, how they are explode for, how they are evaluated and mined and how the metals and minerals are extracted from the ore. The talks highlights some of the features …
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Geophysical implications for the exploration of concealed orogenic gold
Exploration for concealed orogenic gold deposits using geophysical methods is challenging due to the presence of barren, but conductive, sulfides such as pyrrhotite in the overburden (Mir et al., 2019), and a subtle petrophysical contrast between the gold mineralization and its host rocks (Mitchinson, 2009).In many cases, the orogenic gold …
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EPITHERMAL GOLD-SILVER and PORPHYRY COPPER …
systems and vectors to buried porphyry source rocks. These are zoned in time and space from isochemical, to prograde and retrograde metasomatic skarns and later stage epithermal Au overprints. The exploration implications of the geological models presented herein include the ability to target blind ore systems from an understanding of features
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Exploration targeting for orogenic gold deposits in the Granites …
A three-pronged approach to gold prospectivity analysis is put into practice in the Western GTO, which comprises: (1) a "manual" analysis and delineation of exploration targets based on knowledge gained from a new 4D model of the orogen (Joly et al., 2010) complemented by a detailed review of orogenic gold mineral systems (Goldfarb et al ...
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Breakthrough technologies for mineral exploration | SpringerLink
In this paper, breakthrough technologies for mineral exploration are discussed from the following two perspectives: (a) requirements and expectations for …
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