Le gisement plombo-zincif�re de Salafossa (Alpes italiennes orientales): Remplissage d'un pal�okarst triasique par des s�diments sulfures

Lagny, Ph.

doi:10.1007/bf00207893

Cited by 14 publications

(4 citation statements)

References 5 publications

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“…To the category of internal sediments also belong the so-called vitriolic clays, named thus after effio resting iron sulfates (Kuzniar, 1929;Zwierzyeki, 1950). These black residual clays, regarded by some authors as normal sedimentary interca]ations in the Triassic sequence (Giirich, 1903;Zawislak, 1965) (Bogacz et al, 1970(Bogacz et al, , 1973bSass-Gustkiewicz, 1970, 1974, 1975a, 1975bDzulynski, 1976) occurred at the same time for Upper Silesian deposits as for other ore districts (Bernard, 1978;Hoagland et al, 1965;Lagny, 1975;Orgeva!, 1976)…”

Section: Internal Elastic Sedimentsmentioning

confidence: 88%

“…The first possibility, which has met with wide acceptance by geologists who oppose the hydrothermal genesis of sulfide ores (Rouvier, 1971;Bernard, 1978;Lagny, 1975), is unlikely with respect to Upper Silesian deposits in view of what has been said in the preceeding sections. The second possibility (e.g., Hill et al, 1971;McCormick et al, 1971) cannot be so summarily discarded.…”

Section: Hydrothermal Karst and Its Role In The Shaping Of Upper Silementioning

confidence: 99%

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The emplacement of zinc-lead sulfide ores in the Upper Silesian District; a contribution to the understanding of mississippi valley-type deposits

Sass-Gustkiewicz¹,

Dżułyński²,

RIDGE³

1982

Economic Geology

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This paper discusses the manner in which Upper Silesian zinc-lead ores of Mississippi Valley type were introduced into, and deposited within, the ore-bearing dolomite, the host rock of the ores. The ore-bearing dolomite is a neosome developed in Triassic carbonates through dolomitization of limestones and recrystallization of primary or early diagenetic dolomites. It contains three types of ore: (1) ore deposited in rock openings; (2) metasomatically emplaced ore; and ($) ore that crystallized in disaggregated, i.e., delithified, dolomite. The ores were emplaced by mineralizing solutions circulating through an aquifer(s) in lithified rocks. The action of these solutions, combined with that of mobilized ground waters, accounts for the formation of the ore-bearing dolomite. The sulfide ores definitely are epigenetic in relation to their host rocks, and there is no evidence that they were ever part of primary bottom sediments. Further, no evidence is known to us of lateral deposition within the Triassic strata. Mineralization worked outward from those rock volumes that contained the greatest abundance of solution voids. Ample geologic evidence, discussed in this paper, confirmed by measurements of temperature ranges for sulfide precipitation, clearly points to ascending hydrothermal solutions as the progenitors of the ore mineralization. These solutions are thought to be responsible for the formation of conspicuous mineralized karst structures (hydrothermal karsts) that are among the most important ore hosts in the Upper Silesian ore district. The geologic evidence (as detailed in this paper) also indicates that the hydrothermal orebearing solutions rose on a broad front along the northeastern margin of the Silesian basin and, after gaining access to the Triassic aquifer, spread laterally to the south and southwest. larska, 1972). Not until the last decade, however, has the direct relationship of a considerable part of the Upper Silesian ores to underground karst structures been recognized. This direct relationship implies that the eraplacement of ores and the formation of underground karst were parts of the same formative processes and were essentially simultaneous. Such an implication led to the interpretation of Upper Silesian ores in terms of hydrothermal karst processes (Bogacz et al.,

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Section: Internal Elastic Sedimentsmentioning

confidence: 88%

Section: Hydrothermal Karst and Its Role In The Shaping Of Upper Silementioning

confidence: 99%

The emplacement of zinc-lead sulfide ores in the Upper Silesian District; a contribution to the understanding of mississippi valley-type deposits

Sass-Gustkiewicz¹,

Dżułyński²,

RIDGE³

1982

Economic Geology

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“…The upright barite crystals are very similar to selenite gypsum megacrystals from marine evaporites, which also occur through free growth in brine above the water--sediment interface. Nearly all the geopetal structures described in this paper for barite have been mentioned for gypsum from the Messinian evaporites of the Mediterranean (Hardie & Eugster, 1971;Lo Cicero & Catalano, 1976;Rouchy, 1976Rouchy, , 1982Shearman & Orti Cabo, 1976).…”

Section: Discussionmentioning

confidence: 74%

“…It should be noted that most of the structures here described also loccur in environments other than lagoonal sedimentation on the sea floor. Most of them have been observed, for example, in internal sediments of palaeokarstic ore deposits (Bogacz, Dzulynski & Haranczyk, 1973 ;Lagny, 1975 ;Sass-Gustkiewicz, 1975;Orgeval, 1976;Boni & Amstutz, 1982;etc. ) In conclusion, the study of the sedimentary structures found in the Chaudfontaine ore deposit has permitted the deduction of the metallogenic constraints to which it was subjected.…”

Section: Discussionmentioning

confidence: 99%

The sedimentary structures of barite: examples from the Chaudfontaine ore deposit, Belgium

Dejonghe

1990

Sedimentology

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The Chaudfontaine ore deposit is composed mainly of barite and hosted in Frasnian shale and carbonate formations of Belgium. Thirteen sedimentary structures involving barite crystals are described and discussed. Many of these structures appear to have developed under gravity control. The role of mechanical and chemical ore apposition processes are detailed in each case. The study shows that two populations of barite were formed: (1) crystals which grew in brine above the water‐sediment interface and (2) crystals which developed in the sediment during early diagenesis. The two modes of formation have specific sizes, habits and structures. Both populations crystallized under the control of the prevailing physico‐chemical conditions, and the size and abundance of the barite crystals may be expressed as a function of the degree of barium supersaturation. High‐energy currents and unstable sediment caused previously deposited crystals to be reworked. Morphological similarities were found between Chaudfontaine barite and gypsum from evaporites.

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Comparative Reflections on Four Alpine Pb-Zn Deposits

Brigo

Kostelka²,

Omenetto³

et al. 1977

Time- And Strata-Bound Ore Deposits

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Le gisement plombo-zincif�re de Salafossa (Alpes italiennes orientales): Remplissage d'un pal�okarst triasique par des s�diments sulfures

Cited by 14 publications

References 5 publications

The emplacement of zinc-lead sulfide ores in the Upper Silesian District; a contribution to the understanding of mississippi valley-type deposits

The emplacement of zinc-lead sulfide ores in the Upper Silesian District; a contribution to the understanding of mississippi valley-type deposits

The sedimentary structures of barite: examples from the Chaudfontaine ore deposit, Belgium

Comparative Reflections on Four Alpine Pb-Zn Deposits

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