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origin of ore deposits

The Origin of Cu/Au Ratios in Porphyry-Type Ore Deposits ...

Jun 07, 2002· Microanalysis of major and trace elements in sulfide and silicate melt inclusions by laser-ablation inductively coupled plasma mass spectrometry indicates a direct link between a magmatic sulfide liquid and the composition of porphyry-type ore deposits. Copper (Cu), gold (Au), and iron (Fe) are first concentrated in a sulfide melt during magmatic evolution and then released to an ore-forming ...

Ore Deposits: Origin, Exploration, and Exploitation ...

Ore Deposits: Origin, Exploration, and Exploitation is a compilation of diverse case studies in ore deposit geology including atypical examples of mineral deposits and new methods for ore exploration. Volume highlights include: Presentation of the latest research on a range of ore deposit types

(PDF) Economic Geology - Sedimentary ore deposits

The term Sedex implies syngenetic origin of ore and host rocks. The characteristic settin g of these deposits is submar ine rifting wit hin epicontinent al

Immiscible hydrous Fe–Ca–P melt and the origin of iron ...

Apr 12, 2018· The origin of iron oxide-apatite deposits is controversial. Silicate liquid immiscibility and separation of an iron-rich melt has been invoked, but Fe–Ca–P-rich and Si-poor melts similar in ...

New insight into the origin of manganese oxide ore ...

Manganese oxide deposits have long been observed in association with carbonates within the Appalachian Mountains, but their origin has remained enigmatic for well over a century. Ore deposits of Mn oxides from several productive sites located in eastern Tennessee and northern ia display morphologies that include botryoidal and branching forms, massive nodules, breccia matrix cements, …

Origin of the Ore Body — The Sterling Hill Mining Museum

Both deposits are quite large: the Sterling mine in Ogdensburg produced more than 11 million tons of zinc ore, and that at Franklin twice as much. More than 365 different mineral species have been found in these two mines, placing the Franklin-Ogdensburg area in the top five most mineralogically complex localities on Earth.

Classification of ore deposits - SlideShare

Oct 22, 2017· The significant criteria used in these classifications were: morphology or form of deposit (shape, size, attitude), origin or source of ore-bearing fluid (magmatic: plutonic/volcanic, meteoric, commodity content (Cu, Pb-Zn, Au-Ag, etc.), environment of formation or physical-chemical conditions (temperature, pressure, place of deposition: deep ...

Mineral Deposits: Meaning and Composition | Geology

1. Meaning of Mineral Deposits: Mineral deposits refer to occurrence of one or more minerals in concentration to constitute a deposit of economic value. An ore refers to a mineral aggregate from which one or more metals can be profitably extracted. A mineral deposit generally consist of one or more metallic ferrous minerals associated with ...

The origin of Cu/Au ratios in porphyry-type ore deposits.

Jun 07, 2002· The origin of Cu/Au ratios in porphyry-type ore deposits. Halter WE (1), Pettke T, Heinrich CA. Author information: (1)Isotope Geochemistry and Mineral Resources, Department of Earth Sciences, Swiss Federal Institute of Technology (ETH), ETH Zentrum NO, 8092 Zürich, Switzerland. [email protected] Microanalysis of major and trace elements in ...

9 Ore Deposits and Economic Minerals – Mineralogy

Ore deposits are highly variable in nature and origin. The most important kinds of ore deposits are magmatic, hydrothermal, or sedimentary. 9.1 Mineral Commodities 9.1.1 Mineral Resources. Earth gives us many mineralogical resources, also called mineral …

Geology of Mineral Deposits | USGS.gov

An understanding of the basic geologic characteristics of mineral deposits is crucial to evaluating known deposits and delineating prospective areas of mineralization. Studies on mineralogy, framework geology, geochronology, and ore deposit genesis can help to better define the characteristics of mineral deposits and can lead to new discoveries of minerals.

Origin of Ore Deposits - Engineering Geology Questions and ...

This set of Engineering Geology Multiple Choice Questions & Answers (MCQs) focuses on "Origin of Ore Deposits". 1. What is the mineral which contains a metallic element which can be economically exploited called? a) Ore mineral b) Metallic mineral c) Eco-ore d) Eco-mineral View Answer

History of the theory of ore deposits : with a chapter on ...

The item History of the theory of ore deposits : with a chapter on the rise of petrology, by Thomas Crook represents a specific, individual, material embodiment of a distinct intellectual or artistic creation found in University of Missouri Libraries. This item is available to borrow from 1 library branch.

Introduction to Mineral Deposit Models

An "ore deposit" is a mineral deposit that has been tested and is known to be of sufficient size, grade, and accessibility to be producible to yield a profit. (In these days of controlled economies and integrated industries, the "profit" decision may be based on considerations that extend far beyond the mine itself, in some instances relating ...

Origin Franklin ore deposit

The origin of the zinc deposits at Franklin and Sterling Hill, New Jersey, is a question of great interest to the student of mineralogy and ore deposits. Several excellent summaries of the geology, with its numerous problems of structure, petrology, and metamorphism, and of the mineralogy and paragenesis of the ores have appeared in recent years. 1

Origin of Sulfur in Some Magmatic-Hydrothermal Ore ...

Endogranitic ore sulfur of the Xihuashan and the Shizhuan deposits are consid- ered magmatic, derived from by ca.+2 ‰ δ34S granitic magma, but the carbonate-hosted ore sulfurs at the major part of the Shizhuan and Huashaping deposits are much higher than those expected from rock sulfur δ34S values of the Yanshanian granites of the South ...

Topic 1-Concepts of an ore deposit - SlideShare

Feb 02, 2016· Topic 1-Concepts of an ore deposit 1. Introduction to Mining Geology Hassan Z. Harraz [email protected] 2010- 2011 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.

Ore Deposits: Origin, Exploration, and Exploitation | Wiley

Ore Deposits: Origin, Exploration, and Exploitation is a compilation of diverse case studies on new prospects in ore deposit geology including atypical examples of mineral deposits and new methods for ore exploration. Volume highlights include: Presentation of the latest research on …

(PDF) Introduction to Sedimentary Ore Deposits

Sed. Ore Deposit Env. 10. Introduction. The process of sedimentation as disti nct from evaporation has resulted not only in the. formation of common sedimentary rocks but also in valuable mineral ...

CLASSIFICATION OF DEPOSITS

Hydrothermal solutions pass along the fault zone and deposit or precipitate the ore and gangue minerals within the open spaces. Thus, the vein is necessarily younger than the rocks that contain it. Since we are fairly certain which deposits are syngenetic and which are epigenetic (although there will always be some degree of uncertainty and ...

New Insight Into The Origin Of Manganese Oxide Ore ...

Manganese oxide deposits have long been observed in association with carbonates within the Appalachian Mountains, but their origin has remained enigmatic for well over a century. Ore deposits of Mn oxides from several productive sites located in eastern Tennessee and northern ia display morphologies that include botryoidal

Origin of the granites and related Sn and Pb-Zn ...

May 30, 2016· Origin of the granites and related Sn and Pb-Zn polymetallic ore deposits in the Pengshan district, Jiangxi Province, South China: constraints from geochronology, geochemistry, mineral chemistry, and Sr-Nd-Hf-Pb-S isotopes

ORE DEPOSIT TYPES AND THEIR PRIMARY EXPRESSIONS K.G ...

ORE DEPOSIT TYPES Ore deposits can be classified on the basis of: - • Composition of the deposit (contained elements). • Form of the deposit (size, shape, orientation and ore mineral distribution). • Associated host rocks or geological structures (ore associations). • Interpreted genesis of the deposit (processes, controls).

Magmatic origin of giant 'Kiruna-type' apatite-iron-oxide ...

Apr 10, 2013· Williams, P. J. et al. Iron oxide copper-gold deposits: geology, space-time distribution and possible modes of origin. Economic Geology 100, 371–405 (2005). Google Scholar

Classification of Ore Deposits

Feb 12, 2017· Classifications based on origin that were devised before 1900, except the outline by Vogt in 1893, implied that deep-seated deposits, other than magmatic segregations, were formed wholly or mainly by waters that had descended from the surface, and, after either short and direct or long and devious circulation, during which they dissolved metals and gangue material from country rocks, …

Geological features and origin of the chromite deposits of ...

In: Ore Deposits as Related Structural features, W.H. New House, Ed., 110–125 (1942) Snethlage, R., Von Gruenewaldt, G.: Oxygen fugacity and its bearing on …

SP-02 Geology and Origin of the Iron Ore Deposits of the ...

The Zenith mine, at Ely in the Vermilion iron district of Minnesota, yielded about 21 million tons of high grade iron ore before closing in 1962. The ore that was mined consisted of massive crystalline hematite, brecciated and cemented by a later generation of crystalline hematite. The deposits are steeply dipping tabular bodies enclosed within ...

Origin Franklin ore deposit

The origin of the zinc deposits at Franklin and Sterling Hill, New Jersey, is a question of great interest to the student of mineralogy and ore deposits. Several excellent summaries of the geology, with its numerous problems of structure, petrology, and …

Origin and evolution of ore fluids of the jinwozi gold ...

Jul 01, 2021· 1. Introduction. Groves et al., 1998, Goldfarb et al., 2001 systematically addressed the geological and geochemical characters of orogenic Au deposits that provide roughly one-third of the global gold production. Although with a long research history, there has been increased controversy over the sources of fluid, gold, sulfur, and other metals in these deposits, as well as the mechanism of ...

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