supergene oxidation of copper deposits zoning and

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Supergene features and evolution of gossans capping …

Supergene oxidation of copper deposits: zoning and distribution of copper oxide minerals SEG Newsl. (2000) C. Nuñez et al. Aprovechamiento integral del mineral de gossan. ...

Atacamite in the oxide zone of copper deposits in northern …

 · Abstract. Atacamite, a copper hydroxychloride, is an important constituent of supergene oxide zones of copper deposits in northern Chile, whereas in similar deposits elsewhere, it is rare. In Chile, it has generally been assumed to be a primary constituent of the supergene zones. There are two difficulties with this supposition.

Porphyry copper deposit

Porphyry copper deposits are copper ore bodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. Predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its …

Supergene Alteration of Norwegian Sulphide deposits — a …

Supergene Alteration of Norwegian Sulphide deposits — a query. by F. M. Vokes. In the previous NGU year book H. Bjørlykke (1960) gave some interesting facts regarding the diminution of copper content with depth in certain Norwegian Caledonian massive sulphide

Topic 9 supergene enrichment

 · 22 November 2015 Prof. Dr. H.Z. Harraz Presentation Supergene Enrichment 2 Outline of Topic 9: We will explore all of the above in Topic 9. Definition Weathering Processes and Supergene ore Deposits Conditions that Influence Supergene Enrichment

Atacamite in the oxide zone of copper deposits in …

Atacamite, a copper hydroxychloride, is an important constituent of supergene oxide zones of copper deposits in northern Chile, whereas in similar deposits elsewhere, it is rare. In Chile, it has generally been assumed to be a primary constituent of the supergene zones. There are two difficulties with this supposition. The first is that atacamite requires saline water for its formation ...

Ore Deposits Formed by Oxidation and Supergene …

Start studying Ore Deposits Formed by Oxidation and Supergene Enrichment (BE) (Met Non Met). Learn vocabulary, terms, and more with flashcards, games, and other study tools. The _____ are therefore: 1) To render barren the upper parts of many ore deposits.

(PDF) Supergene Enrichment

 · identifiable stained gossans. Zone of secondary or supergene sulfide enrichment: Immediately below the oxidised zone is sometimes a zone known as the supergene zone where metals are deposited by ...

Ore deposits formed by oxidation and supergene enrichment

Ore Deposits Formed by Oxidation and Supergene Enrichment. When ore deposits are exposed to the oxidation zone they are weathered and altered with the country rocks. The surface waters oxidize many ore minerals and yield solvents that dissolve other minerals. An orebody thus becomes oxidized and generally leached of many of its valuable ...

Age of Supergene Oxidation and Enrichment in the Chilean Porphyry Copper …

copper deposits and prospects between latitudes 20 ø and 27 ø S in northern Chile yield K/Ar ages ranging from about 34 to 14 Ma. Therefore supergene oxidation and enrichment processes were active from the early Oligocene to the middle Miocene, a minimum

Supergene (geology)

 · In ore deposit geology, supergene processes or enrichment are those that occur relatively near the surface as opposed to deep hypogene processes. Supergene processes include the predominance of meteoric water circulation with concomitant oxidation and chemical weathering. The descending meteoric waters oxidize the primary ( hypogene) sulfide ore ...

(PDF) Supergene enrichment of copper deposits since the …

In the Atacama Desert of northern Chile, large amounts of the copper hydroxy-chloride mineral atacamite (Cu2Cl(OH)3) are formed in the supergene oxidation zone of Cu deposits.

Copper Deposits in Sedimentary and Volcanogenic Rocks

Copper deposits occur in sedimentary and volcanogenic rocks within a wide variety of geologic environments where there may be little or no evidence of hydrothermal alteration. Some deposits may be hypogene and have a deep-seated source for the ore fluids, but because of rapid cooling and dilution during syngenetic deposition on the ocean floor, the resulting deposits are not associated with ...

(PDF) Supergene Oxidation of Copper Deposits: Zoning …

Supergene Oxidation of Copper Deposits: Zoning and Distribution of Copper Oxide Minerals. APRIL 2000 SEG NEWSLETTER HSOCIETY OF ECONOMIC GEOLOGISTSH NUMBER 41 Supergene Oxidation of Copper Deposits: Zoning and Distribution of Copper Oxide Minerals WILLIAM X. CHÁVEZ, JR. (SEG 1990) MINERALS & ENVIRONMENTAL ENGINEERING DEPARTMENT • NEW …

Controls on Supergene Enrichment of Porphyry Copper …

 · TY - JOUR T1 - Controls on Supergene Enrichment of Porphyry Copper Deposits in the Central Andes: A Review and Reinterpretation. Mineralium Deposita AU - Hartley, Adrian John AU - Rice, Clive Maitland PY - 2005/12 Y1 - 2005/12 N2 - The Central Andes ...

Bam Bam Resources Corp.: Bam Bam Drill Holes Indicate …

 · Some recent and historic drill holes at Majuba bottomed in significant copper grades below the copper oxide zones, including: MMX-24 (1,100 ft deep hole): 370 …

Supergene Enrichment

Supergene Enrichment - How Natural Processes have Transformed Low-Grade Copper Mineralization into Economic Ores by David F. Briggs In "What is a Porphyry Copper Deposit?", I discussed the general relationships of the primary alteration and mineralization

Controls on Supergene Enrichment of Porphyry Copper …

TY - JOUR T1 - Controls on Supergene Enrichment of Porphyry Copper Deposits in the Central Andes: A Review and Reinterpretation. Mineralium Deposita AU - Hartley, Adrian John AU - Rice, Clive Maitland PY - 2005/12 Y1 - 2005/12 N2 - The Central Andes ...

Supergene (geology)

Supergene (geology) Last updated August 09, 2019In ore deposit geology, supergene processes or enrichment are those that occur relatively near the surface as opposed to deep hypogene processes. Supergene processes include the predominance of meteoric water circulation with concomitant oxidation and chemical weathering..

The Great Porphyry Copper Deposits of Arizona | …

 · Porphyry Copper deposits are the planet''s largest source of copper and those of Arizona are among the great mineral endowments of the world. Mining Camps like Bisbee, Ray, Globe-Miami (Morenci) have produced for over a century inspiring songwriters and explorationists alike, and deposits like San Manuel – Kalamazoo have proven critical to our understanding of how these deposits form.

Microbes and Supergene Deposits: From Formation to …

Oxidation of disulfide minerals (e.g., pyrite) by Fe 3+ produces intermediary thiosulfate (S 2 O 3 2−), which complexes with gold. In the enrichment zone of the supergene environment, a diversity of microbes may have served to form secondary copper sulfide

Supergene Oxidation of Copper Deposits: Zoning and Distribution …

deposits, with emphasis on minerals that occur in the supergene oxide zones of porphyry copper and skarn ore deposits."Copper oxides" are defined as those copper minerals containing oxidized anions, especially copper oxides, sensu strictu, sulfates

Supergene Oxidized and Enriched Porphyry Copper and …

Supergene leaching, oxidation, and chalcocite enrichment in porphyry and related Cu deposits take place in the weathering environment to depths of several hundred meters. The fundamental chemical principles of su-pergene processes were elucidated during the early decades of the twentieth century, mainly from studies in the western United States.

(PPT) Supergene Mineralisation in Porphyry Cu Deposit | …

A generalized but detailed description of the procedures for oxidation and supergene enrichment in porphyry copper deposit 37 Full PDFs related to this paper

12. Supergene Ore and Gangue Characteristics

186 12. Supergene Ore and Gangue Characteristics Table 12–1. Mineral assemblages of supergene environments in selected volcanogenic massive sulfide (VMS) deposits. Minerals in italics are present in minor or trace amounts. New South Wales, Australia 1

Bam Bam Drill Holes Indicate Supergene Copper …

 · MMX-24 (1,100 ft deep hole): 370 ft (112.8m) @0.45% Cu from 730-1100 ft (222.5-335.3m) in enrichment zone. MHB-6 (800 ft deep hole): bottom 50 feet …

Age of Supergene oxidation and enrichment in the …

Middle Miocene oxidation also affected the oldest epithermal gold-silver deposits in the Maricunga belt farther east. Supergene activity commenced no less than 11 m.y. after generation of each porphyry copper deposit because of the time required to unroof the

Supergene (geology)

In ore deposit geology, supergene processes or enrichment are those that occur relatively near the surface as opposed to deep hypogene processes. Supergene processes include the predominance of meteoric water circulation with concomitant oxidation and chemical weathering..