Criteria for the detection of hydrothermal ecosystem faunas in ores of massive sulfide deposits in the Urals
| Autor: | Leonid V. Danyushevsky, S. P. Maslennikova, A. S. Tseluiko, Valeriy V. Maslennikov, Ross R. Large, N. R. Ayupova, A. Yu. Lein, Vladimir A Simonov |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
010504 meteorology & atmospheric sciences Sulfide Chalcopyrite Volcanogenic massive sulfide ore deposit Geochemistry Mineralogy engineering.material 010502 geochemistry & geophysics 01 natural sciences Sphalerite chemistry Seafloor massive sulfide deposits Geochemistry and Petrology visual_art engineering visual_art.visual_art_medium Marcasite Economic Geology Pyrite Pyrrhotite Geology 0105 earth and related environmental sciences |
| Zdroj: | Lithology and Mineral Resources. 52:173-191 |
| ISSN: | 1608-3229 0024-4902 |
| DOI: | 10.1134/s002449021703004x |
| Popis: | The ore-formational, ore-facies, lithological, and mineralogical-geochemical criteria are defined for the detection of hydrothermal ecosystem fauna in ores of the volcanic-hosted massive sulfide deposits in the Urals. Abundant mineralized microfauna is found mainly in massive sulfide mounds formed in the jasperous basalt (Buribai, Priorsk, Yubileinoe, Sultanov), rhyolite–basalt (Yaman-Kasy, Blyava, Komosomol’sk, Sibai, Molodezhnoe, Valentorsk), and the less common serpentinite (Dergamysh) formations of the Urals (O-D2). In the ore-formational series of the massive sulfide deposits, probability of the detection of mineralized fauna correlates inversely with the relative abundance of felsic volcanic rocks underlying the ores. This series is also marked by a gradual disappearance of colloform pyrite, marcasite, isocubanite, pyrrhotite, and pyrite pseudomorphoses after pyrrhotite; increase of the amount of bornite, fahlores, and barite; decrease of contents of Se, Te, Co, and Sn in chalcopyrite and sphalerite; and decrease of Tl, As, Sb, and Pb in the colloform pyrite. Probability of the detection of mineralized fauna in the morphogenetic series of massive sulfide deposits decreases from the weakly degraded sulfide mounds to the clastic stratiform deposits. The degradation degree of sulfide mounds and fauna preservation correlates with the attenuation of volcanic intensity, which is reflected in the abundance of sedimentary and volcanosedimentary rocks and the depletion of effusive rocks in the geological sections. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|