Composition and origin of fluids associated with lode …

2006-11-19 · Composition and origin of fluids associated with lode gold deposits in a Mesoarchean greenstone belt (Warrawoona Syncline, Pilbara Craton, Western Australia) using synchrotron radiation X-ray fluorescence Nicolas The´baud Æ Pascal Philippot Æ Patrice Rey Æ Jean Cauzid Received: 25 November 2005/Accepted: 6 June 2006/Published online: 18 ...

Archaean lode gold deposits in Africa: Crustal setting ...

1993-7-1 · Smaller lode gold deposits are also present in the greenstone belts of the central and northern Kaapvaal craton, the more important being the stibnite-gold mineralization that accompanied late brittle deformation of carbonatized high-Mg basalts in the Murchison greenstone belt.

U-Pb evidence for Abitibi gold mineralization postdating ...

1990-8-30 · Abstract. Two widely held theories for the origin of Archaean lode gold ... Jemielita, R., Davis, D. & Krogh, T. U-Pb evidence for Abitibi gold mineralization postdating greenstone magmatism and ...

Stratigraphy, Structure and Geochronology of Archean …

The Central Manitoba mine trend is one of the most important lode gold camps in the Rice Lake greenstone-granitoid belt of the western Uchi Subprovince within the western Superior Province, Manitoba, Canada. Neoarchean host rocks consist of a south-facing volcano-sedimentary succession (2.75–2.73 Ga) intruded by voluminous gabbroic sills and ...

Origin of an unusual fluid composition in Early ...

2021-2-20 · Palaeoproterozoic gold-bearing veins of lode-gold deposits as well as palaeoplacers, both in Ghana and Burkina Faso, pre­ dominantly contain COrN2-rich fluid inclusions often displaying a very high-density (up to 1.15 g/cm3), which is in con­ trast to most other lode-gold deposits of greenstone affiliation.

Archaean lode gold deposits: the solute source problem ...

Abstract. On a regional scale lode gold deposits typically occur throughout the entire spectrum of greenstone belt stratigraphy. In the Abitibi Belt lode deposits are sited at the base of the volcanic cycle (Noranda), at the boundary of two volcanic cycles (Timmins) and in the stratigraphically highest groups at Kirkland Lake and Bousquet.

Understanding Archean greenstone-hosted lode gold ...

2019-12-3 · belts (Thurston, 2015 & Goldfarb et al. 2005). Archean lode gold is a very important part of global gold resources and the 3.1-2.6 Ga Superior province is second only to the Witwatersrand basin in terms of historic gold production. These greenstone-hosted lode disseminated gold deposits are

Constraints on the timing of lode‐gold mineralisation in ...

2007-5-9 · 40 Ar‐ 39 Ar ages of hydrothermal muscovites constrain the age of gold mineralisation in the Wiluna greenstone belt, Western Australia. A single muscovite sample from the Matilda M1 deposit, hosted in the greenschist‐amphibolite facies Matilda domain, has a 40 Ar‐ 39 Ar plateau‐like segment corresponding to an age of 2623 ± 12 Ma (2 σ). This is interpreted as the …

Operations & Projects

The deposit is an Archean greenstone-hosted orogenic lode gold deposit. Gold is found within quartz-tourmaline-carbonate veins, which are hosted within a series of sub-parallel sub-vertical shear zones centered around a steeply plunging cylinder-shaped porphyritic diorite ("The Triangle Plug"), which intrudes the mafic volcanic stratigraphy ...

The Geology of Gold Deposits: The ...

Lode gold deposits formed during late ductile-brittle stages of deformation are related to major fault systems and to zones of rock alteration within greenstone-granite subprovinces. Granulite metamorphism at depth, involving dehydration and formation of HO 2 − and CO 2 -rich fluids, was synchronous with brittle deformation, rock alteration ...

GEOBAROMETRY

1999-11-2 · Available geobarometric data for lode-gold deposits from the Superior Province greenstone belts in Canada, in contrast, display a distinct clustering of pressure and depths of formation at the mesozonal level (1.5 to 3.0 kbar at >6 km to 12 km depth).

Archaean lode gold mineralisation in banded iron …

2006-7-12 · The study of hydrothermal alteration in lode-gold deposits based on the relative chemical variation in major and trace elements has been widely used (Ludden et al. 1984; Kishida and Kerrich 1987; Love and Roberts 1991; MacLean and Hoy 1991; Fleet et al. 1997; Eilu et al. 2001) in Archaean greenstone belts to determine the chemical composition ...

Gold Deposits and Their Geological Classification

2016-11-20 · A rational geological classification of the commonly recognized lode gold deposits is feasible if it is based on the geological settings of the deposits, host rocks, nature of mineralization and geoche m-ical signature. Sixteen common types of bedrock gold deposits are distinguished from one another and their main geological attributes are ...

Data driven predictive modelling for Archean lode gold ...

2006-7-3 · Predictive models for Archean lode gold potential in the Bubi greenstone belt were developed using probabilistic spatial data analysis and integration. Data-sets used include gold deposits records, geological maps, structural maps, aero-magnetic and ASTER imagery. Geological features indicative of Archean lode

"Geochemical Constraints of the Gold Mineralization ...

Kirkland Lake Gold''s Macassa Mine is a lode gold deposit in the Abitibi Greenstone. It has two systems of mineralization: the Main/''04 Breaks, and the South Mine Complex (SMC). The objective of this work was to constrain mineralization sources between these systems using geochemical signatures. The SMC has different structure, mineralogy, alteration, trace- and …

Greenstone-hosted lode-gold mineralization at Dungash …

The systematic evolution towards lighter δ 34 S values may be attributed to recrystallization, or to ore fluid buffering under variable physicochemical conditions. The shear zone-related setting, mineralogy and isotopic characteristics of gold mineralization in Dungash mine are comparable with other orogenic gold deposits in the region (e.g ...

Low-Sulfide Quartz Gold Model

2003-2-27 · Low-Sulfide Quartz Gold Deposit Model By Lawrence J. Drew U.S. Geological Survey Reston, VA 20192 Deposits in this class have been widely described and given many names: • Mesothermal gold • Mother lode type • Homestake type • Low-sulfide quartz gold • Gold-only deposits • Quartz-carbonate lode gold

Late-Archean granitoid-hosted lode-gold deposits, …

greenstone terranes e.g. Groves, 1993; Groves et al., 1995 . Their origin, however, has been contentious. for over a century and there remain polarised views on both the timing and mode of their formation. Although all lithologies in the granitoid–greenstone terranes host lode-gold mineralisation, deposits

Stratigraphy, structure and lode gold system at the ...

2016-8-1 · 1. Introduction. The Superior Province hosts numerous world class gold deposits (>8500 t) in Archean greenstone–granitoid belts (Goldfarb et al., 2001).Four main types of gold deposits have been documented in the Province (e.g., Robert et al., 2005, Robert et al., 2007): orogenic gold deposits (e.g., Kirkland Lake, Rice Lake), gold-rich volcanogenic massive sulfide …

Archaean lode gold deposits | SpringerLink

Abstract. Lode gold deposits are one of the most characteristic features of Archaean greenstone belts within granitoid-greenstone terranes, with major deposits situated in most major cratonic areas (e.g. Australia, Brazil, Canada, India, South Africa, Zimbabwe: Foster, 1984; Macdonald, 1986; Ho and Groves, 1987).

Detour West Gold – Gambier Gold Corp.

Gold mineralization at the Detour Lake Gold Mine is characteristic of greenstone-hosted orogenic lode gold style deposits. The Detour Lake Gold Mine produced 601,566 ounces of gold in 2019 and has proven and probable mineral reserves of 447,450 Kt at an average grade of 0.97 g/t Au for 14,847,000 contained gold ounces as of December 31, 2019.

(PDF) Understanding Archean greenstone-hosted lode …

2020-3-23 · Archean lode gold is a very important part of global gold resources and the 3.1-2.6 Ga Superior province is second only to the Witwatersrand basin in term s of historic gold

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Paleoproterozoic Hydrothermal Reactivation in Neoarchean Orogenic Lode-gold Deposits of the Abitibi Greenstone Belt: U-Pb Monazite Geochronological Evidence from the Young-Davidson Mine, Ontario. Precambrian Research, 249, p. 263-272.

Mesothermal and Greenstone Gold Deposits AKA …

2016-11-23 · Mesothermal and Greenstone Gold Deposits AKA Orogenic Geology Formation. Mesothermal gold deposits form half way up through the rise of the …

Opawica Explorations Inc. Working on Lode Gold Targets ...

2021-4-29 · Vancouver, B.C. – TheNewswire – April 29, 2021 – Opawica Explorations Inc. ("Opawica" or the "Company") (TSXV:OPW) is pleased to announce that it is in process of evaluating its data on its structurally controlled lode gold targets in the Abitibi greenstone belt in Québec and central Newfoundland Appalachians, Rogerson structural corridor in …

The Metallogeny Of Lode Gold Deposits | Pdf Books …

 · The Metallogeny of Lode Gold Deposits: A Syngenetic Perspective is a synthesis of lode gold vein forming processes, addressing the commonality in similar worldwide deposits. The book''s empirical model incorporates widely known and accepted principles of ore deposition and shows how it applies in the volcanic-sedimentary greenstone belt ...

Gold-Quartz Veins I01

2010-10-19 · SYNONYMS: Mother Lode veins, greenstone gold, Archean lode gold, mesothermal gold-quartz veins, shear-hosted lode gold, low-sulphide gold-quartz veins, lode gold. COMMODITIES ( BYPRODUCTS ): Au (Ag, Cu, Sb).

(PDF) Reverse shear, horizontal shortening and lode-gold ...

Exploration for lode-gold deposits in the Archaean Yalgoo-Singleton greenstone belt of Western Australia is difficult, due to widespread, thick transported cover blanketing the bedrock from the ...

Greenstone-hosted lode-gold mineralization at Dungash …

2014-11-1 · Orogenic lode-gold deposit at Dungash is hosted by Neoproterozoic greenstone. Auriferous quartz veins in are confined to ∼E-trending shear/dilation zones. Vein morphology and structures demonstrate formation concurrent with dextral shear. Gold was formed at ∼365 and 280 °C in association with late Fe–Cu–Sb sulfides.

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