Results 41 to 50 of about 1,324 (171)

Bismuth tellurides and sulphosalts from the Larga hydrothermal system, Metaliferi Mts., Romania: Paragenesis and genetic significance [PDF]

, 2004
© 2004 Mineralogical Society of Great Britain and IrelandIntermediate levels of the Larga-Fata Baii field, Metaliferi Mts., Romania, are host to epithermal vein mineralization, small skarn-like bodies and ‘geode’-like replacement ores, that together form
N. J. Cook, C. L. Ciobanu, Borcoş, Ioan, Damian, Kase, Popescu, Borcoş, Borcoş, Ghiţulescu, Şimon, Şimon, Bayliss, Shimizu, Berbeleac, Udubaşa, Yusa, Alderton, Douglas, Barton, Borcoş, Borcoş, Ciobanu, Cioflica, Cioflica, Cioflica, Cook, Cook, Lupulescu, Damian, Drew, Drew, Karup-Møller, Popescu, Koch, Cook, Popescu, Roşu, Elliott   +38 more
core   +2 more sources

Geochemical and mineralogical heterogeneity of the Cantung mine tailings: implications for remediation and reprocessing

Frontiers in Geochemistry
Reprocessing tailings to recover minerals of economic interest and environmental concern can add value to a project and decrease environmental risk, but dealing with heterogeneity within tailings facilities is a challenge.
A. Surrette, A. Dobosz, G. Lambiv Dzemua, H. Falck, H. E. Jamieson   +4 more
doaj   +1 more source

Discharge of hydrothermal fluids through sediment at the Escanaba Trough, Gorda Ridge (ODP Leg 169): assessing the effects on the rock magnetic signal [PDF]

, 2000
An integrated rock-magnetic and multivariate statistical analysis of a suite of sediment samples recovered from ODP Sites 1037 and 1038 (Leg 169, Escanaba Trough, Gorda Ridge spreading center, NE Pacific Ocean) has been carried out to assess the use of
Dekkers, M.J., Krumsiek, Klaus, Urbat, Michael   +2 more
core   +1 more source

Occurrence and characterization of nanosulfide‐rich regions on asteroid Ryugu: Insights from mackinawite and pyrrhotite

Meteoritics &Planetary Science, Volume 61, Issue 1, Page 168-181, January 2026.
Abstract Samples returned from asteroid Ryugu by the Hayabusa2 mission are dominated by fine‐grained matrix material made of phyllosilicates and nanosulfides. Here, we report the mineralogical, textural, and chemical characteristics of nanosulfide‐rich regions identified in Ryugu particles.
Roberto Conconi, Hugues Leroux, Maya Marinova, Sylvain Laforet, Damien Jacob, Léna Jossé, Alice Aléon‐Toppani, Zélia Dionnet, Rosario Brunetto, Corentin Le Guillou   +9 more
wiley   +1 more source

FIB-TEM Investigations of Fe-NI-Sulfides in the CI Chondrites Alais and Orgueil [PDF]

, 2013
The CI chondrites are primitive meteorites with bulk compositions matching the solar photosphere for all but the lightest elements. They have been extensively aqueously altered, and are composed primarily of fine-grained phyllosilicate matrix material ...
Berger, Eve L., Keller, L. P., Lauretta, D. S., Zega, T. J.   +3 more
core   +1 more source

Identifying Framboidal Pyrrhotite: A Proxy for Hydrothermal Alteration of Organic‐Rich Sediments

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract Framboidal pyrrhotite, in sharp contrast to framboidal pyrite, has been rarely reported, and its formation remains poorly understood. Here we report its clear identification in a shale‐gas well core and explore its potential as a proxy for diagenesis or low‐grade metamorphism of organic‐rich sediments.
Y. Wang, D. Jia, A. R. Muxworthy, Y. Zhang, L. Qi, C. Z. Jia, L. Liu, N. Jiang   +7 more
wiley   +1 more source

Low‐Frequency Raman Spectra of Natural Pyrrhotites: Polarization Dependence for Its Lattice Modes

Journal of Raman Spectroscopy, Volume 56, Issue 12, Page 1529-1536, December 2025.
The present study found low‐wavenumber Raman modes of pyrrhotite Fe1‐xS at ~68, ~87, ~117, and ~230 cm−1 for the first time, thanks to a lab‐built Raman spectrometer, in which the optical path of the incident laser was purged by Ar gas. The sufficiently high signal‐to‐noise and signal‐to‐base ratios enabled us to obtain the polarization dependence of ...
Shu‐hei Urashima, Mana Kito, Shiori Nakajima, Kenichi Oguchi, Aruto Kashima, Hiroharu Yui   +5 more
wiley   +1 more source

Domain-wall dynamics in 4C pyrrhotite at low temperature [PDF]

, 2017
Monoclinic 4C pyrrhotite (Fe7S8) is ferrimagnetic due to an ordered defect structure with alternating vacancy and vacancy-free sublattices. Its low-temperature magnetic transition near 35 K is characterized by the distinct increase in coercivity and ...
Charilaou, M., García-Rubio, I., Gehring, A. U., Kind, J., Löffler, J. F., Nowaczyk, N. R.   +5 more
core  

The Magnetization Process In Monoclinic Pyrrhotite (Fe₇S₈) Particles Containing Few Domains [PDF]

Geophysical Journal International, 1991
SUMMARY Monoclinic pyrrhotite was prepared by the silica tube technique. All characteristic properties (X-ray, magnetic) point to the successful synthesis of Fe7S8. the material was separated into seven size fractions in the particle size range 1–30 μm, in which the particles are believed to contain only few domains.
A. Menyeh, W. O'reilly
openaire   +1 more source

Trace Element Transport and Deposition During Magmatic Degassing: The Effect on Martian Rocks and Fines

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract Martian magmas compositionally resemble those from terrestrial continental hotspot magmatic suites, characterized by low OH and high Cl and S contents. The magmatic gases exsolved from such magmas transport a variety of metal complexes and, upon cooling, precipitate vapor‐deposits into vugs and fractures within rocks and on the surfaces of ...
N. Zimmermann, M. Safari, H. Nekvasil
wiley   +1 more source