Antimonian mineralization and sequence of the mineral formation in nonsulfide endogeneous Pb–Zn–Sb ores of the Pelagonian massif, Republic of North Macedonia

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Resumo

The mineralogy and behavior of antimony in sulfide-free ore-bearing metasomatites of the Pelagonian massif (the so-called Nežilovo-type ores) were studied. Based on the data on the morphological features of ore minerals (primarily Sb-containing) and the zoning of their individuals, as well as using data obtained by the authors earlier, four stages of mineral formation were identified for the first time within the metasomatic stage of ore formation, during which mineral associations with oxygen compounds of chalcophile elements (Sb, As, Zn, Pb, Cu) sequentially formed.

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Sobre autores

V. Ermolaeva

Institute of Experimental Mineralogy RAS

Autor responsável pela correspondência
Email: cvera@mail.ru
Rússia, Chernogolovka, Moscow obl.

N. Chukanov

Federal Research Center of Problems of Chemical Physics and Medicinal RAS; Moscow State University

Email: cvera@mail.ru

Faculty of Geology

Rússia, Chernogolovka, Moscow obl.; Moscow

D. Varlamov

Institute of Experimental Mineralogy RAS

Email: cvera@mail.ru
Rússia, Chernogolovka, Moscow obl.

S. Jančev

Saints Cyril and Methodius University

Email: cvera@mail.ru

Faculty of Technology and Metallurgy

Macedônia, Skopje

Bibliografia

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2. Fig. 1. Correlations between contents (apfu) of some elements in pyrochlore-supergroup minerals from ores of the Nežilovo area.

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3. Fig. 2. Correlations between contents (apfu) of some elements in minerals of the rutile–tripuhyite series from ores of the Nežilovo area.

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4. Fig. 3. Correlations between contents (apfu) of some elements in nežilovite from ores of the Nežilovo area.

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5. Fig. 4. Correlation between contents (apfu) of Sb and Ti in zincorinmanite-(Zn) from ores of the Nežilovo area.

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6. Fig. 5. Correlations between contents of some components (wt %) in högbomite-supergroup minerals from ores of the Nežilovo area.

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7. Fig. 6. Typical individuals of pyrochlore-supergroup minerals from ores of the Nežilovo area. Light zones are enriched in Pb. The associated minerals are: (a) phlogopite; (б) 1 — braunite, 2 — phlogopite, 3 — Ba-bearing phlogopite, 4 — dolomite of early generation; (в) 1 — baryte, 2 — dolomite; (г) 1 — tilasite, 2 — barite; (д) phlogopite of late generation; (е) phlogopite of an early generation. Polished sections. SEM (BSE) images.

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8. Fig. 7. Typical individuals of minerals of the rutile–tripuhyite series from ores of the Nežilovo area: crystal of early generation (a) and individual of late generation with the outer zone enriched in Sb and Fe. The associated minerals are: (a) 1 — tilasite and 2 — calcite; (б) phlogopite (grey). Polished sections. SEM (BSE) images.

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9. Fig. 8. Typical individuals of almeidaite from ores of the Nežilovo area and associated minerals: (a) 1 –almeidaite (lenticular crystal, light trey), 2 — pyrochlore-supergroup minerals, 3 — tilasite, 4 — calcite, 5 — dolomite, 6 — quartz, 7 — phlogopite, 8 — hematite and (б) 1 — almeidaite anhedral individual (dark grey at the center), 2 — gahnite, 3 — barite of early generation. Polished sections. SEM (BSE) images.

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10. Fig. 9. Typical individuals and aggregates of nežilovite from ores of the Nežilovo area and associated minerals: (a) 1 — nežilovite-2 (sections of thin platelets), 2 — quartz, 3 — baryte, 4 — hematite, 5 — Zn-bearing magnesioriebeckite; (б) 1 — nežilovite-2 (sections of platelets), 2 — quartz, 3 — calcite, 4 — dolomite, 5 — piemontite; (в) 1 — nežilovite-1, 2 — phlogopite of late generation, 3 — fluorapatite, 4 — hematite; (г) 1 — nežilovite-1 (sections of thin platelets), 2 — baryte, 3 — aggregate of högbomite-supergroup minerals and nežilovite, 4 — Zn-bearing magnesioriebrckite. Polished sections. SEM (BSE) images.

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11. Fig. 10. Associations of 1 — sintaxic intergrowths of zincorinmanite-(Zn) (light zones) and a Fe3+-dominant högbomite-supergroup mineral (dark zones) with 2 — baryte, 3 — quartz (а) and the same minerals and 4 — Zn-bearing amphibole (б). Polished sections. SEM (BSE) images.

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12. Fig. 11. Typical individuals and aggregates of högbomite-supergroup minerals (HSM) from ores of the Nežilovo area and associated minerals: (a) 1 — split crystal of an Al- and Ti-dominant HSM (dark grey) in the graphic aggregate of gahnite (2) and barite (3); (б) HSM with low contents of Ti and Sb (presumably, Mn4+-dominant) in graphical aggregate of Mn-, Zn- and Pb-bearing epidote (2) and barite (3), with zoned piemontite-(Pb)–ferripiemontite-(Pb) (4), piemontite (5) and albite (6); (в) Al-dominant HSM with Ti- and Sb-dominant zones (1) in quartz (2); (г) Fe3+- and Sb-dominant HSM (1) in aggregate of baryte (2), hydroxyplumboroméite (3) and quartz (4); (д) Fe3+- and Ti-dominant HSM (1) in the aggregate of braunite (2), phlogopite (3) and ferricoronadite (4); (е) epitaxy of zincovelrsite-(6N6S) (1) on gahnite-1 (2) in the aggregate of gahnite-2 (3). Polished sections. BSE images.

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13. Table 6. Sequence of crystallization of minerals in the ores of the Pelagonian massif

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