Details
Original language | English |
---|---|
Article number | 74 |
Pages (from-to) | 139-153 |
Number of pages | 15 |
Journal | Geologica Carpathica |
Volume | 74 |
Issue number | 2 |
Publication status | Published - 23 Apr 2023 |
Abstract
Keywords
- Dobšiná, geochemistry, hydrothermal processes, metal release, platinum-group elements, sulfarsenides, sulfides
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Geologica Carpathica, Vol. 74, No. 2, 74, 23.04.2023, p. 139-153.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - "Remobilization of Ni–Co–As and platinum-group elements by carbonate metasomatic alteration (listvenitization) of metaultramafic rocks from Dobšiná, Slovakia"
AU - Kiefer, Stefan
AU - Ivan, Peter
AU - Kaufmann, Andreas B.
AU - Vďačný, Marek
AU - Majzlan, Juraj
PY - 2023/4/23
Y1 - 2023/4/23
N2 - Hydrothermal processes are mainly responsible for the release and accumulation of metals and metalloids in rocks. In this work, we investigated the mineralogy and geochemistry of altered metaultramafic rocks (listvenites) that are spatially associated with Ni–Co ores near Dobšiná aiming to identify the sources of the elements in the hydrothermal Ni–Co-mineralization. Optical microscopy, electron microprobe analysis, and laser-ablation inductively coupled mass spectrometry were used to correlate the mineralogy with the degree of rock alteration. The sulfides and silicates in the meta-ultramafic rocks host rare, tiny inclusions of cooperite (nominally PtS), sperrylite (PtAs2), Pty–Pd–Ir–Te phase, and Pt–Au–Cr-alloy. The results show that the metaultramafic rocks were the source of Ni and Co and that platinum-group elements (PGE) were also leached and mobilized from the metaultramafic rocks. LA-ICP-MS scans show that the sulfarsenides in the metaultramafic rocks host submicrometer inclusions of PGE minerals but the hydrothermal Ni–Co sulfarsenides contain much less PGE’s. These observations document the limited mobility of the PGE‘s. Changes in the sulfide mineralogy as a function of degree of alteration suggest that the fluids brought Fe and S, and probably a substantial amount of As whereas the metaultramafic rocks supplied Ni, Co, PGE, and perhaps also some As
AB - Hydrothermal processes are mainly responsible for the release and accumulation of metals and metalloids in rocks. In this work, we investigated the mineralogy and geochemistry of altered metaultramafic rocks (listvenites) that are spatially associated with Ni–Co ores near Dobšiná aiming to identify the sources of the elements in the hydrothermal Ni–Co-mineralization. Optical microscopy, electron microprobe analysis, and laser-ablation inductively coupled mass spectrometry were used to correlate the mineralogy with the degree of rock alteration. The sulfides and silicates in the meta-ultramafic rocks host rare, tiny inclusions of cooperite (nominally PtS), sperrylite (PtAs2), Pty–Pd–Ir–Te phase, and Pt–Au–Cr-alloy. The results show that the metaultramafic rocks were the source of Ni and Co and that platinum-group elements (PGE) were also leached and mobilized from the metaultramafic rocks. LA-ICP-MS scans show that the sulfarsenides in the metaultramafic rocks host submicrometer inclusions of PGE minerals but the hydrothermal Ni–Co sulfarsenides contain much less PGE’s. These observations document the limited mobility of the PGE‘s. Changes in the sulfide mineralogy as a function of degree of alteration suggest that the fluids brought Fe and S, and probably a substantial amount of As whereas the metaultramafic rocks supplied Ni, Co, PGE, and perhaps also some As
KW - Dobšiná
KW - geochemistry
KW - hydrothermal processes
KW - metal release
KW - platinum-group elements
KW - sulfarsenides
KW - sulfides
UR - http://www.scopus.com/inward/record.url?scp=85164922652&partnerID=8YFLogxK
U2 - 10.31577/GeolCarp.2023.10
DO - 10.31577/GeolCarp.2023.10
M3 - Article
VL - 74
SP - 139
EP - 153
JO - Geologica Carpathica
JF - Geologica Carpathica
SN - 0016-7738
IS - 2
M1 - 74
ER -