Szczegóły publikacji
Opis bibliograficzny
Geochemistry and textural evolution of As-Tl-Sb-Hg-rich pyrite from a sediment-hosted $As-Sb-Tl-Pb \pm Hg \pm Au$ mineralization in Janjevo, Kosovo / Sławomir MEDERSKI, Jaroslav PRŠEK, Juraj Majzlan, Stefan Kiefer, Dimitrina Dimitrova, Rastislav Milovský, Christian Bender Koch, Dawid KOZIEŃ // Ore Geology Reviews ; ISSN 0169-1368. — 2022 — vol. 151 art. no. 105221, s. 1–26. — Bibliogr. s. 23–26, Abstr. — Publikacja dostępna online od: 2022-11-22
Autorzy (8)
- AGHMederski Sławomir
- AGHPršek Jaroslav
- Majzlan Juraj
- Kiefer Stefan
- Dimitrova Dimitrina
- Milovský Rastislav
- Koch Christian Bender
- AGHKozień Dawid
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 143910 |
|---|---|
| Data dodania do BaDAP | 2022-12-01 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.oregeorev.2022.105221 |
| Rok publikacji | 2022 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Ore Geology Reviews |
Abstract
The sediment-hosted As-Sb-Tl-Pb ± Hg ± Au Janjevo occurrence is located in the southern part of the Kizhnica-Hajvalia-Badovc ore field, in the Trepça (Trepča) Mineral Belt (TMB) in Kosovo. The As-Sb-Tl-Pb ± Hg ± Au mineralization is hosted by Upper Triassic marbles and occurs in the form of quartz-stibnite veins and dolomitized irregular pockets associated with jasperoid rocks. The main sulfide most widespread in the mineralization studied is pyrite which is the main carrier of thallium. A wide range of techniques was used to characterize the geochemistry and textural evolution of pyrite/marcasite from Janjevo: polarized reflected-light microscopy, electron microprobe (EPMA), laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), X-ray powder diffraction (XRPD), Mössbauer spectroscopy, and isotopic studies. The study of 42 thin and polished sections resulted in the identification of 4 generations of pyrite/marcasite. The first generation of pyrite related to the pre-ore stage occurs as framboidal pyrite with different degrees of evolution (Py1a), as well as recrystallized pyrite/marcasite (Py1b). Au-enriched pyrite (Py2) occurs as elongated fibrous aggregates and is genetically associated with the formation of stibnite veins (Sb stage). As-Tl-Sb-Hg pyrite (Py3) forms irregular colloform aggregates which fill the stylolites and also overgrow older generations of pyrite. The youngest generation is represented by marcasite (Py4), which forms euhedral crystals. Co/Ni ratio < 1 in all pyrite/marcasite generations implies a sedimentary fingerprint. On the other hand, δ34S isotopic studies confirm a magmatic sulfur source for As-Tl-Sb-Hg pyrite (Py3), as well as co-occurring stibnite and realgar. The most important minor and trace elements in pyrite/marcasite are As (up to 14.1 %), Tl (up to 3.94 %), Sb (up to 3.73 %), and Hg (up to 0.55 %), which are mainly hosted by Py3. In addition to arsenic, thallium, antimony, and mercury, other generations of pyrite show enrichment in Ni, Co, and Cu (framboidal pyrite Py1), Au, and Se (Au-enriched pyrite Py2), and Se (marcasite Py4). The highest gold content of up to 6.08 ppm was recorded at Py2. Studies on Py3 geochemistry confirm the presence of 2Fe2+ ↔ Tl+ + Sb3+ heterovalent substitution in pyrite. As-Tl-Sb-Hg pyrite (Py3) is the main thallium host mineral in the mineralization studied, with significantly less thallium present in the Pb-Sb ± Tl ± As sulfosalts. In addition, the high arsenic content of Py3 is due to the presence of arsenic in the form of As1− and As0 related to amorphous arsenic-rich nanoparticles. The reported Py3 is the best phenomenon of the crystallization of colloform As-Tl-Sb-Hg-rich pyrite under hydrothermal conditions. Pyrite-rich sediment-hosted As-Sb-Tl-Pb ± Hg ± Au mineralization from Janjevo is associated with the distal manifestation of a concealed porphyry system.