Szczegóły publikacji
Opis bibliograficzny
Geochemistry and mineralogy of ferromanganese crusts from the Western Cocos-Nazca Spreading Centre, Pacific / Dominik Zawadzki, Łukasz Maciąg, Iker Blasco, Francisco Javier González, Benjamin Wernette, Egidio Marino, Gabriela A. KOZUB-BUDZYŃ, Adam PIESTRZYŃSKI, Rafał J. Wróbel, Kevin McCartney // Minerals [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2075-163X. — 2022 — vol. 12 iss. 5 art. no. 538, s. 1–30. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 26–30, Abstr. — Publikacja dostępna online od: 2022-04-26
Autorzy (10)
- Zawadzki Dominik
- Maciąg Łukasz
- Blasco Iker
- González Francisco Javier
- Wernette Benjamin
- Marino Egidio
- AGHKozub-Budzyń Gabriela A.
- AGHPiestrzyński Adam
- Wróbel Rafał J.
- McCartney Kevin
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 140108 |
|---|---|
| Data dodania do BaDAP | 2022-05-12 |
| Tekst źródłowy | URL |
| DOI | 10.3390/min12050538 |
| Rok publikacji | 2022 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Minerals |
Abstract
Late Pleistocene–Holocene rocks from the western part of Cocos-Nazca Spreading Centre (C-NSC) include ferromanganese crusts that elucidate the geochemistry and mineralogy of a deep-sea geological setting. Six representative Fe-Mn crust samples were studied using petrological methods, such as optical transmitted light microscopy, energy dispersive X-ray fluorescence spectrometry, inductively coupled plasma mass spectrometry, bulk X-ray diffraction, scanning electron microscopy and electron probe microanalysis. Geochemical, mineralogical and petrological signatures indicate complex formation influenced by mild hydrothermal processes. These crusts consist mostly of mixed birnessite, todorokite-buserite, and Mn-(Fe) vernadite with traces of diagenetic manganates (asbolane), Fe-oxides and oxyhydroxides or hydrothermally associated and relatively pure Mn-oxyhydroxides (manganite). The average Mn/Fe ratio is 2.7, which suggests predominant mixed hydrogenous-early diagenetic crusts with hydrothermal influences. The mean concentrations of three prospective metals (Ni, Cu and Co) are low: 0.17, 0.08 and 0.025 wt %, respectively. The total content of ΣREY is also low, and ranges from 81 to 741 mg/kg (mean 339 mg/kg). We interpret the complex geochemical and mineralogical data to reflect mixed origin of the crusts, initially related with formation of hydrothermal plume over the region. This process occurred during further interactions with seawater from which additional diagenetic and hydrogenetic elemental signatures were acquired.