Results 21 to 30 of about 151 (127)

Petromagnetism and paleomagnetism of the Tarkhanian sediments in Kop-Takyl section (the Kerch Peninsula)

Russian Journal of Earth Sciences, 2020
A petromagnetic and paleomagnetic study of the Tarkhanian sediments of the Kop-Takyl section was carried out in order to obtain data on magnetostratigraphy of the Miocene sedimentary succession of Eastern Paratethys.
Pilipenko O V, Filina E V, Rostovtseva Yu V, Novruzov Z   +3 more
doaj   +1 more source

Thermoremanence in monoclinic pyrrhotite particles containing few domains

Geophysical Research Letters, 1998
The intensity and stability of thermoremanent magnetization (TRM) acquired by synthetic Fe7S8 particles in the size range 1‐29 µm has been determined. The intensity falls with increasing particle size. The unblocking temperature increases with increasing particle size.
A. Menyeh, W. O'Reilly
openaire   +1 more source

Magnetic Hysteresis Properties of Fine Particles of Monoclinic Pyrrhotite Fe7S8.

Journal of geomagnetism and geoelectricity, 1997
The magnetic hysteresis properties have been studied of synthetic Fe7S8 separated into a suite of 8 particle size fractions in the range 1 to 30μm. Between-196°C to about 260°C, both saturation isothermal remanence (Mrs) and coercive force (Hc) can be represented as analytical functions of particle size (L) of the form (Mrs, Hc) ∝ L-n or (Mrs, Hc ...
Menyeh, A., O'Reilly, W.
openaire   +2 more sources

High-purity monoclinic pyrrhotite derived-from natural pyrite with excellent removal performance for Cr (VI) and its mechanism

Environmental Science and Pollution Research, 2023
Abstract Pyrrhotite, especially the monoclinic type, is a promising material for removing Cr (VI) from wastewater and groundwater due to its high reactivity. However, the purity of the preparation monoclinic pyrrhotite from heated natural pyrite is not high enough and the role of possible sulfur vacancies in pyrrhotite’s crystal structure has ...
Hao, Liu, Yuxin, Li, Guocheng, Lv, Xin, Liu, Libing, Liao   +4 more
openaire   +2 more sources

Sulfide mineralogy of igneous basic rocks (ophites) from the external zone of the Betic Cordillera [PDF]

European Journal of Mineralogy
The Triassic sedimentary rocks of the external zone of the Betic Cordillera in southern Spain host abundant igneous basic rocks (“ophites”) metamorphosed in the greenschist facies.
J. M. González-Jiménez, I. F. Blanco-Quintero, L. Yesares, C. Marchesi, A. R. Ferreira, I. González-Pérez, E. Schettino, F. A. Jiménez Cantizano, F. Gervilla   +8 more
doaj   +1 more source

Andreybulakhite, Ni(C₂O₄)  ⋅  2H₂O, the first natural nickel oxalate [PDF]

European Journal of Mineralogy
Andreybulakhite, ideally Ni(C2O4) ⋅ 2H2O, is a new member of the humboldtine group, named in honour of Andrey Glebovich Bulakh of Saint Petersburg State University.
O. S. Vereshchagin, S. N. Britvin, S. N. Britvin, D. V. Pankin, M. S. Zelenskaya, M. G. Krzhizhanovskaya, M. A. Kuz'mina, N. S. Vlasenko, O. V. Frank-Kamenetskaya   +8 more
doaj   +1 more source

Mineralogical Characteristics and Beneficiation Experimental Study on Polytype Pyrrhotite in Kafang Deposit, Yunnan Province

Kuangchan zonghe liyong
With the increase of pyrrhotite content in Kafang copper-tungsten deposit, how to reduce the effects of pyrrhotite on the beneficiation process of copper and tungsten has become a difficult problem.
Rong ZHAO, Baoxu SONG, Jiuran PU, Jie WU, Mingbo CHEN, Xiaoyan SUN   +5 more
doaj   +1 more source

The Magnetic Mineralogy of Carbonaceous Chondrites: A Microscopy and Machine Learning Study of Meteorite WIS 91600

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract A central challenge in the paleomagnetic study of meteorites is to characterize their diverse remanence carriers. Here, we develop a machine‐learning assisted workflow that combines multi‐scale (mm to nm) and multi‐dimensional (2D‐3D) microscopy to build a comprehensive picture of ferromagnetic mineralogy in the C2 ungrouped carbonaceous ...
Richard J. Harrison, Po‐Yen Tung, Thomas Ginnis, Farhang Nabiei, Ursula Shaw, Elias N. Mansbach, James Bryson   +6 more
wiley   +1 more source

Tectonic Controls on Volcanism and Associated Hydrothermal Activity in a Sediment‐Dominated Mid‐Ocean Ridge; Escanaba Trough

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.
Abstract Mid‐ocean ridges, the Earth's most extensive volcanic system, exhibit unique characteristics in sediment‐dominant environments. Thick sediment cover insulates the crust and channels fluid along pathways that can lead to the formation of distinct crustal alteration patterns, exceptionally large mineral deposits, and specialized chemosynthetic ...
Christopher Galley, John Jamieson, Amy Gartman, Isobel Yeo, Masako Tominaga, Maurice Tivey, Carlos Braga, Laura Moore, Sharon L. Walker   +8 more
wiley   +1 more source

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