Results 31 to 40 of about 1,324 (171)

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

Draa Sfar, Morocco: A Visean (331 Ma) pyrrhotite-rich, polymetallic volcanogenic massive sulphide deposit in a Hercynian sediment-dominant terrane [PDF]

, 2008
International audienceDraa Sfar is a Visean, stratabound, volcanogenic massive sulphide ore deposit hosted by a Hercynian carbonaceous, black shale-rich succession of the Jebilet terrane, Morocco. The ore deposit contains 10 Mt grading 5.3 wt.% Zn, 2 wt.%
Belkabir, Abdelhay, Gibson, Harold L., Lentz, David, Marcoux, Eric, Ruffet, Gilles   +4 more
core   +6 more sources

Sclerite formation in the hydrothermal-vent “scaly-foot” gastropod — possible control of iron sulfide biomineralization by the animal [PDF]

, 2006
A gastropod from a deep-sea hydrothermal field at the Rodriguez triple junction, Indian Ocean, has scale-shaped structures, called sclerites, mineralized with iron sulfides on its foot.
Chiba, Hitoshi, Endo, Kazuyoshi, Hashimoto, Jun, Hirata, Takafumi, Horikoshi, Koki, Kato, Yasuhiro, Kirschvink, Joseph L., Kogure, Toshihiro, Kopp, Robert E., Mizota, Chitoshi, Nealson, Kenneth H., Ozaki, Noriaki, Suga, Akinobu, Suzuki, Yohey, Takai, Ken, Tsuchida, Shinji   +15 more
core   +2 more sources

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

Long-term evolution of an Oligocene/Miocene maar lake from Otago, New Zealand [PDF]

, 2015
Foulden Maar is a highly resolved maar lake deposit from the South Island of New Zealand comprising laminated diatomite punctuated by numerous diatomaceous turbidites.
Adams, Anderson, B. R. S. Fox, Bahadori, Bannister, Berner, Blanchet, Canfield, Clark, Coombs, Coombs, Craw, Crusius, D. E. Lee, Dekkers, Egli, Evans, F. E. Nelson, Forsyth, G. S. Wilson, Graham, Gunsinger, Hay, Heslop, Heslop, Hoernle, Horng, J. Wartho, Jiang, Kruiver, Larrasoaña, LeMasurier, Lindqvist, Liu, Lorenz, Lowrie, Mildenhall, Miller, Peters, Peters, Pirrung, Reichgelt, Reynolds, Roberts, Roberts, Roberts, Robertson, Snowball, Steiger, Sutherland, Symons, Thompson, Torii, Turrin, Turrin, Turrin, Turrin, Tuttle, U. Kaulfuss, Urbat, Vaughan, Weaver, Weeks, White, Wilkin, Williams, Wilson, Zachos   +67 more
core   +2 more sources

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

A spatially continuous magnetization model for Mars [PDF]

, 2005
[1] Using a three-component magnetic field data set at over 100,000 satellite points previously compiled for spherical harmonic analysis, we have produced a continuously varying magnetization model for Mars.
Acuña, Acuña, Albee, Arkani-Hamed, Arkani-Hamed, Arkani-Hamed, Arkani-Hamed, Arkani-Hamed, Arkani-Hamed, Arkani-Hamed, Cain, Christensen, Christensen, Connerney, Connerney, Dunlop, Elkins-Tanton, Greeley, Hood, Hynek, Jackson, Johnson, K. A. Whaler, Kiefer, Klingelhöfer, Langlais, Langlais, Lemoine, Maus, Maus, McEnroe, McEnroe, Neumann, Nimmo, Nimmo, Parker, Parker, Parker, Parker, Press, Purucker, Purucker, Purucker, Ravat, Rieder, Robinson, Rochette, Rochette, Runcorn, Schultz, Shure, Smith, Stevenson, Walker, Wessel, Whaler, Whaler, Whaler, Whaler, Yoder, Zuber   +60 more
core   +2 more sources

Pseudobinary Fe4Ti3S8 compound with a NiAs-type structure: Effect of Ti for Fe substitution [PDF]

, 2013
The transition metal sulfide Fe4Ti3S8 with 7:8 composition has been synthesized and studied by using X-ray diffraction, magnetization and electrical resistivity measurements. This compound exhibits a monoclinic crystal lattice (space group I12/m1).
Baranov, N. V., Gubkin, A. F., Ibrahim, P. N. G., Selezneva, N. V.   +3 more
core   +1 more source

Kinematics of Burial Remagnetizations in Fold‐and‐Thrust Belts: A Case Study From the South Pyrenean Foreland Basin (NE Spain)

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract This study investigates two burial‐related remagnetizations in the Jaca–Pamplona foreland basin (Southern Pyrenees): one with dual polarity and a positive reversals test, and another with only reverse polarity. These components, labeled C3 and C4 based on their mean unblocking temperatures, were identified from a paleomagnetic analysis of 142 ...
P. Calvín, E. Izquierdo‐Llavall, P. Sierra‐Campos, E. Beamud, M. J. Dekkers, R. Egli, A. Rodríguez‐Pintó, J. C. Larrasoaña, E. L. Pueyo   +8 more
wiley   +1 more source