Macrotextures, microtextures, and carbonate-sulfide relationships in stratiform, carbonate-hosted Zn-Pb orebodies of Silvermines, Ireland

Saved in:
Authors:Kucha, H.
Author Affiliations:Primary:
Afedlin Fys.-Chem. Geol., B-3030 Heverlee, Belgium
Volume Title:Mineralium Deposita
Source:Mineralium Deposita, 24(1), p.48-55. Publisher: Springer-Verlag, Berlin, Federal Republic of Germany. ISSN: 0026-4598
Publication Date:1989
Note:In English. 14 refs.; illus. incl. 3 tables, geol. sketch map
Summary:Ore-stage carbonates of the Silvermines stratiform orebodies have increased Zn and Pb and high Fe and Mn content. A major microtexture observed is produced by the replacement of carbonate allochems by dolomite, Fe-dolomite, and siderite followed by the replacement of carbonates by sulphides. Generally, the process of replacement took place while the former fabric of the host carbonates was preserved. The reactivity of metal carbonates with S favoured the concentration of Pb and Zn in the sulphide and of Fe and Mn in the carbonate form. Sulphide-carbonate reactions probably maintained a high permeability in the ore zone over an extended period of time eventually producing a high-grade ore from solutions rich in Fe and Mn but poor in Zn and Pb. Initial porosity and permeability created by gravity flows controlled the mineralizing process at the beginning, but later stages were probably controlled by replacements i.e. sulphide-carbonate reactions. [L.G.L.]
Subjects:Carbonates; Economic geology; Fabric; Host rocks; Lead-zinc deposits; Metal ores; Metasomatism; Stratiform deposits; Sulfides; Textures; Europe; Ireland; Western Europe; Silvermines
Abstract Numbers:90M/0388
Record ID:1990008011
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe
Tags: Add Tag
No Tags, Be the first to tag this record!
LEADER 02987naaaa2200433zu 4500
001 1990008011
003 ViAlAGI
005 20190221170532.0
008 190110s1989 gw a 0 0 eng d
040 |a ViAlAGI  |c ViAlAGI 
072 7 |a 27A  |2 georeft 
100 1 |a Kucha, H.  |e analytic author  |u Afedlin Fys.-Chem. Geol., B-3030 Heverlee 
245 1 0 |a Macrotextures, microtextures, and carbonate-sulfide relationships in stratiform, carbonate-hosted Zn-Pb orebodies of Silvermines, Ireland 
300 |a p. 48-55 
500 |a In English. 14 refs. 
500 |a Abstract number: 90M/0388 
500 |a Abstractor: L.G.L. 
500 |a Affiliation: Afedlin Fys.-Chem. Geol.; B-3030 Heverlee; BEL; Belgium 
500 |a Key title: Mineralium Deposita 
500 |a Source note: Mineralium Deposita, 24(1), p.48-55. Publisher: Springer-Verlag, Berlin, Federal Republic of Germany. ISSN: 0026-4598 
500 |a Publication type: journal article 
504 |b 14 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe 
520 |a Ore-stage carbonates of the Silvermines stratiform orebodies have increased Zn and Pb and high Fe and Mn content. A major microtexture observed is produced by the replacement of carbonate allochems by dolomite, Fe-dolomite, and siderite followed by the replacement of carbonates by sulphides. Generally, the process of replacement took place while the former fabric of the host carbonates was preserved. The reactivity of metal carbonates with S favoured the concentration of Pb and Zn in the sulphide and of Fe and Mn in the carbonate form. Sulphide-carbonate reactions probably maintained a high permeability in the ore zone over an extended period of time eventually producing a high-grade ore from solutions rich in Fe and Mn but poor in Zn and Pb. Initial porosity and permeability created by gravity flows controlled the mineralizing process at the beginning, but later stages were probably controlled by replacements i.e. sulphide-carbonate reactions. 
650 7 |a Carbonates  |2 georeft 
650 7 |a Economic geology  |2 georeft 
650 7 |a Fabric  |2 georeft 
650 7 |a Host rocks  |2 georeft 
650 7 |a Lead-zinc deposits  |2 georeft 
650 7 |a Metal ores  |2 georeft 
650 7 |a Metasomatism  |2 georeft 
650 7 |a Stratiform deposits  |2 georeft 
650 7 |a Sulfides  |2 georeft 
650 7 |a Textures  |2 georeft 
651 7 |a Europe  |2 georeft 
651 7 |a Ireland  |2 georeft 
651 7 |a Western Europe  |2 georeft 
653 |a Silvermines 
773 0 |t Mineralium Deposita  |d Berlin : Springer-Verlag, 1989  |x 0026-4598  |y MIDEBE  |n Mineralium Deposita, 24(1), p.48-55. Publisher: Springer-Verlag, Berlin, Federal Republic of Germany. ISSN: 0026-4598 Publication type: journal article  |g Vol. 24, no. 1  |h illus. incl. 3 tables, geol. sketch map