stratiform and stratabound ore deposits
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- stratiform and stratabound ore deposits
The terms stratiform orebody and stratabound orebody are defined and it is suggested that stratiform orebodies are a particular form of stratabound orebodies. …
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Not to be confused with stratabound, which refers to those types of ore body which are concordant or discordant, Stratiform Gold Deposits:Rudaceous hosted (placer) and restricted to a particular part of the stratigraphic column such as some veins, pipes and flats. 2A. Sedimentary host rocks a.
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Passive margins and rift-related ore deposits include those known as Mississipi Valley-type (MVT), sedimentary exhalative polymetallic massive sulphides (SEDEX) and the Cu-rich stratabound and stratiform disseminated sulphides, all of which can be broadly grouped under the wider family of sedimentary-hydrothermal ore systems.
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Ore Deposit Types. The unifying characteristics of the volcanogenic massive sulfide deposit type are (1) association with volcanics, and (2) mineralization by hydrothermal solutions at or near the sea-floor. Early papers referred to these deposits as stratiform and stratabound deposits, or exhalative deposits. Deposits in vol-
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In mineral deposit: Stratiform deposits. A final class of hydrothermal deposit is called stratiform because the ore minerals are always confined within specific strata and are …
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The Neoproterozoic central African Copperbelt is one of the greatest sediment-hosted stratiform Cu–Co provinces in the world, totalling 140 Mt copper and 6. Mt cobalt and including several world-class deposits (⩾10 Mt copper).. The origin of Cu–Co mineralisation in this province remains speculative, with the debate centred around …
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Mississippi Valley-type deposits. MVT deposits are always in limestones and are generally located near the edges of sedimentary basins or around the edges of what were islands or high points in the seafloor when the …
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The mean 238 U/ 204 Pb ratios of the diagenetic- and orogenic-stage sulphides are 10.21 and 10.44, respectively, overlapping with those of the average Lufubu schist (10.38) and the Mufulira granodiorite (10.21), and …
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Reduced facies (Kupferschiefer) type deposits are hosted in shales or siltstones containing reduced carbon or sulfur minerals. They host sheet-like ore bodies of very large tonnage (sometimes 1 billion tonnes or more) and moderate grade (~1.4% Cu). In sandstone-type (Revett) deposits Cu minerals are hosted in sandstones containing …
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Introduction. Sediment-hosted stratiform copper deposits are tabular, bedding-parallel bodies of zonally-distributed, disseminated and veinlet-controlled copper and copper-iron sulfides occurring near and at oxidation-reduction boundaries of the host sedimentary rock sequence (Kirkham, 1989, Brown, 1992, Hitzman et al., 2005, Hitzman …
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The ore minerals in stratabound deposits are exclusively confined within a single-specific stratigraphic unit. The stratabound deposits will include various orientation of mineralization representing layers, rhythmic, stratiform, veinlets, stringers, disseminated, and …
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Among the first works emphasizing the role of stratabound ore deposits in the Andes are those by Amstutz (1959, 1961), Entwistle and Gouin (1955), Kobe (1960), Ljunggren and Meyer (1964), and Ruiz ...
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The stratiform-type ore bodies constitute a marginal to low Mn grade and are also characterized by lower Mn content (26.19–39.24%) along with the Mn/Fe ratio of 7.16–12.23, while the stratabound-type Mn ore bodies are rich in Mn (35.92–49.64%) along with the higher Mn/Fe ratio of 14.15–23.97.
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Handbook of Strata-bound and Stratiform Ore Deposits, Volume 5 Handbook of Strata-bound and Stratiform Ore Deposits, Karl H. Wolf Principles and general studies: Editor: Karl H. Wolf: Publisher: Elsevier Scientific Publishing Company, 1976: Original from: the University of Michigan: Digitized: Feb 20, 2010: ISBN: 0444414053, 9780444414052 ...
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deposits have a broad range of relationships with their host rocks that includes stratabound, and discordant ores; in some deposits, stratiform and vein ore are important. The most important characteristics of MVT ore deposits are that they are hosted mainly by dolostone and limestone in platform carbonate sequences and usually located …
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Associated deposit types (Cox and Singer, 1986) include bedded barite deposits (Model 31b), stratabound lead-zinc in clastic rocks (Model 30a), Mississippi Valley type lead-zinc (Models 32a,b), sedimentary manganese (Model 34b), ... of stratiform ore suggests that these deposits formed, in highly restricted basins, by syngenetic to early diagenetic
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The Xinqiao stratabound deposit was formed in a more oxidizing environment and have relatively lower ... There are two main occurrences of ore bodies: one is stratiform and lenticular and the other is lenticular. The former is the dominant deposit type, mainly composed of massive pyrite (greater than 90 %), and the secondary …
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The problem of time-and strata-bound formation of ore deposits has during the past decade become one of the most debated topics in cur rent international discussion. Due to the amazing results of modern mineral exploration and world-wide geophysical research, the mutual relationship between the complex geological history pf a crustal seg …
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The ore deposits under consideration include varieties of stratabound and stratiform ore types. The development of these deposits coincided well with the paleogeographic evolutional pattern of the ...
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THE STRATABOUND ORE DEPOSITS IN THE EASTERN ALPS . 1: Sulfide Kies deposits with copper contents . 15: Stibnite deposits . 22: Manganese deposits . 29: ... Handbook of Strata-bound and Stratiform Ore Deposits, Karl H. Wolf Principles and general studies: Editor: Karl H. Wolf: Publisher: Elsevier Scientific Publishing Company, 1976:
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This report contains a descriptive model of sediment-hosted stratabound copper (SSC) deposits that supersedes the model of Cox and others (2003). This model is for use in assessments of mineral resource potential. SSC deposits are the second most important sources of copper in the world behind porphyry copper deposits. Around 20 percent of …
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The term sediment-hosted stratiform copper (SSC) deposits is considered to be the best compromise as it emphasizes, in addition to the sedimentary host rocks, two other characteristics — the stratiform nature of mineralization and the dominance of copper — that separate this class of deposits from other classes of sediment-hosted deposits.
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Chapter 3 – CLASSIFICATIONS OF STRATA-BOUND ORE DEPOSITS | Semantic Scholar. DOI: 10.1016/B978-0-444-41401-4.50007-1. Corpus ID: 132810634.
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These stratabound to stratiform copper deposits are described in several provinces over the world, e.g., the central Africa copper belt in Zambia and Zaire, central Europe copper belt, Dongchuang ...
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Handbook of Strata-Bound and Stratiform Ore Deposits, Volume 7: Au, U, Fe, Mn, Hg, Sb, W, and P Deposits focuses on the characteristics, properties, origins, and structures …
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Hannak WW (1981) Genesis of the Rammelsberg ore deposit near Goslar/Upper Harz, FRG. In: Wolf KH (ed) Handbook of strata-bound and stratiform ore deposits, vol 9. Elsevier, Amsterdam, pp 551–642. Google Scholar Hu M (1988) A preliminary study of the organic geochemistry of the stratabound deposits.
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Evaluation of Critical Elements in "Bathtub Rim Deposits" of the Midcontinent: We have identified previously unrecognized (or forgotten) ore-grade concentrations of REE and Mn, Co and equally critical elements, including U, Ni, PO 4, Sc, Sr, and F, in specific stratigraphic intervals that host "bathtub rim" deposits in the midcontinent. We will ...
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Two groups of Cenozoic stratabound and stratiform ore deposits of different paleo-geographic positions, stratigraphic setups, and paleo-environments are …
به خواندن ادامه دهید•Stratiform, Stratabound and Tabular deposits of irregular habit •Lenticular bodies of all dimensions, including bodies occurring en echelon, silicified linear zones of composite veins •Lenses veins and pockets, stock-works, irregular shaped, modest to small sized bodies •Gemstones and rare metal pegmatite's, reefs and veins •Placers ...
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stratiform ore deposits part iv edited by k.h. wolf volume 14 regional studies and specific deposits indexes volumes 11-14 elsevier science publishers b.v.
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The term can refer to a stratiform deposit, to variously oriented orebodies contained within the unit, or to a deposit containing veinlets and alteration zones that may or may not be strictly conformable with bedding. Ref: AGI. References. Click here to see list of references, authorities, sources and geographical terms as used in this glossary
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The major stratiform Zn-Pb-Ag deposits exhibit many similar geological and geochemical features that include: (1) location close to regionally extensive normal and …
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Stratiform and stratabound Zn-Pb-Ag sulfide deposits hosted in siliciclastic sedimentary rocks constitute some of the world's largest accumulations of base metals. ... The search for metamorphosed ore deposits uses a variety of geological, geochemical, and geophysical exploration techniques, including field evaluations that involve the ...
به خواندن ادامه دهیدThis report contains a descriptive model of sediment-hosted stratabound copper (SSC) deposits that supersedes the model of Cox and others (2003). This model is for use in assessments of mineral resource potential. SSC deposits are the second most important sources of copper in the world behind porphyry copper deposits. Around 20 …
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Pb-Zn-Ag stratiform deposits occur in ancient continental rift sediments (Sawkins, 1990 ). These deposits, which are not associated with igneous rocks, occur in marine carbonates and are probably deposited from brines, which migrate to the edge of rift basins. REE, Nb, U, Th, Ba, P, Sr, and halogens are concentrated in carbonatites and other ...
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The average grade of an ore deposit is calculated, often employing very sophisticated statistical procedures, as an average of the grades of a very large number of samples collected from throughout the deposit. ...
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2.3.7.6 Mississippi Valley Type. The "Mississippi valley type" (MVT) deposits are epigenetic, stratabound, rhythmically banded ore with replacement of primary sedimentary features predominantly carbonate (limestone, marl, dolomite and rarely sandstone) host rocks. The mineralization is hosted in open space filling, collapse breccias, faults ...
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The age and genesis of many deposits cannot be attributed to only one cycle of formation but at least two stages must be considered. The total time of formation for kies ore deposits lies between 50 and 250 my. The examples of Karatau and Sardinia prove a theory according th which the formation of Pb/Zn deposits in carbonate rocks cannot only ...
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The stratiform-type ore bodies constitute a marginal to low Mn grade and are also characterized by lower Mn content (26.19–39.24%) along with the Mn/Fe ratio of 7.16–12.23, while the ...
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Two main hypogene Cu–Co sulfide mineralization stages and associated gangue minerals (dolomite and quartz) are distinguished. The first is an early diagenetic, typical stratiform mineralization with fine-grained minerals, whereas the second is a multistage syn-orogenic stratiform to stratabound mineralization with coarse-grained minerals.
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