Les filons métallifères hercyniens; origine de l'anhydrite et mécanisme de la pseudomorphose subséquente. Proposition d'un modèle  [Hercynian metalliferous veins; origin of anhydrite and mechanism of subsequent pseudomorphism; proposition of a model]

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Alternate Title:Hercynian metalliferous veins; origin of anhydrite and mechanism of subsequent pseudomorphism; proposition of a model
Authors:Arnold, Michel; Guillou, Jean-Jacques
Author Affiliations:Primary:
Cent. rech. pétrogr. géochim., Vanduvre-lès-Nancy 54500, France
Volume Title:Les réunions de la R.C.P. no 459 "Nature et genèse des faciès confinés"; Apports de la géochimie à l'étude des évaporites
Volume Authors:Busson, G., editor
Source:Sciences de la Terre, 24(2), p.173-195; Apports de la géochimie à l'étude des évaporites; réunion de la R.C.P. No. 459 "Nature et genèse des faciès confinés", Paris, France, April 1980, edited by G. Busson. Publisher: Foundation Scientifique de la Geologie et de ses Applications, Nancy, France. ISSN: 0371-3431
Publication Date:1981
Note:In French with English summary. 2 p. refs.; illus.
Summary:A genetic model is proposed based on a study of 30 veins of lamellar aggregates of quartz from European Hercynian massifs. Anhydrite, and not baryte, is pseudomorphosed (silicified) contemporaneously or subcontemporaneously with anhydrite deposition and crystallization of primary euhedral quartz. The molar concentrations necessary need a silica-oversaturated aqueous solution which is slightly undersaturated in anhydrite component. The mixing of marine or lagoonal brines and continental waters in the open fissures of the basement, as is well known in hot and dry climates, is suggested. The model is supported by observations from veins, pseudomorphic habits, and spatial and temporal considerations. [Z.A.]
Subjects:Anhydrite; Economic geology; Framework silicates; Metal ores; Mineral deposits, genesis; Minerals; Pseudomorphism; Quartz; Silica minerals; Silicates; Sulfates; Variscan Orogeny; Veins; Armorican Massif; Central Massif; Europe; France; Vosges Mountains; Western Europe
Abstract Numbers:83M/1576
Record ID:1985017221
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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