Results 11 to 20 of about 1,324 (171)

Constraining the Relative Chronology of Repeated Large Earthquakes in the Longmen Shan Thrust Belt, Eastern Tibetan Plateau

Geophysical Research Letters
The Yingxiu–Beichuan Fault Zone (YBFZ), located in the Longmen Shan Thrust Belt (LSTB) on the eastern Tibetan Plateau, is highly seismically active. However, direct evidence of large earthquakes at depth is scarce.
Lei Zhang, Haibing Li, Zhiming Sun, Yong Cao, Chunrui Li, Huan Wang, Yong Zheng, Jialiang Si   +7 more
doaj   +2 more sources

Ferrimagnetic Structure of 3C Pyrrhotite (Fe7S8) From Neutron Diffraction

Geochemistry, Geophysics, Geosystems
Pyrrhotite is a paleomagnetically important magnetic mineral in many geological settings. It forms numerous polytypes with different stacking patterns of the NiAs structure along the crystallographic c axis to produce different vacancy‐ordered ...
Chin‐Wei Wang, Chorng‐Shern Horng, Andrew P. Roberts   +2 more
doaj   +2 more sources

Rock Magnetic Responses to Creep and Stick‐Slip Deformation Processes in the Xianshuihe Fault Zone, Eastern Tibetan Plateau

Geophysical Research Letters
The Xianshuihe fault zone (XSHF) in southwestern China accommodates both aseismic creep and seismic slip, yet geological evidence constraining these processes remains limited.
Lei Zhang, Haibing Li, Qiong Wu, Zhiming Sun, Yong Cao, Peng Xu, Jialiang Si   +6 more
doaj   +2 more sources

Micromagnetic Constraints on the Grain Size Dependence and Magnetic Stability of Sub‐Micron Monoclinic Pyrrhotite (Fe ₇ S ₈ ) [PDF]

Journal of Geophysical Research: Solid Earth
Abstract We present the first micromagnetic simulations for sub‐micron monoclinic 4C pyrrhotite (), a common mineral in rocks and sediments and an important mineral in paleomagnetic studies. Previous experimental studies on the magnetic properties of pyrrhotite had limited control over granulometry and focused primarily on larger ...
Wyn Williams, Adrian R. Muxworthy, Ualisson Donardelli Bellon, Lesleis Nagy, Alison A. Cowan, Miguel A. Valdez‐Grijalva, Andrew P. Roberts   +6 more
openaire   +2 more sources

Study on the Structure and Catalytic Performance of Catalyst Fe7S8 for Direct Coal Liquefaction

Taiyuan Ligong Daxue xuebao, 2021
In order to study the relationship between the direct coal liquefaction performance and the structure of Fe7S8 catalysts prepared by different methods, Fe7S8 catalysts with different crystal structures were prepared by calcination and solvothermal method
Xueming WANG, Xiaohong LI, Ruoqing WANG
doaj   +1 more source

THE LOW TEMPERATURE TRANSITION IN MONOCLINIC PYRRHOTITE [PDF]

Le Journal de Physique Colloques, 1988
It is confirmed by new magnetization measurements that a magnetic transition occurs sharply at 30 K in the monoclinic pyrrhotite Fe7S8. Though its nature is not yet fully understood, this transition shows some similarities with the Verwey transition and can provide a powerful tool for the identification of pyrrhotite in rocks.
G. Fillion, P. Rochette
openaire   +1 more source

Ferrimagnetic minerals as possible indicators of the sedimentation environments of the Eastern Paratethys Tarkhanian deposits (Kop-Takyl section)

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2022
The paper presents the results of studies of ferromagnetic minerals and their distribution in the Tarkhanian and transition Tarkhanian-Chokrakian deposits of the Kop-Takyl section (Kerch Peninsula, Eastern Paratethys).
Пилипенко О.В., Ростовцева Ю.В., Сальная Н.В.   +2 more
doaj   +1 more source

High-temperature thermomagnetic properties of vivianite nodules, Lake El'gygytgyn, Northeast Russia [PDF]

Climate of the Past, 2013
Vivianite, a hydrated iron phosphate, is abundant in sediments of Lake El'gygytgyn, located in the Anadyr Mountains of central Chukotka, northeastern Russia (67°30′ N, 172°05′ E).
P. S. Minyuk, T. V. Subbotnikova, L. L. Brown, K. J. Murdock   +3 more
doaj   +1 more source

Rock magnetic investigations constraining relative timing for gold deposits in Finland [PDF]

Bulletin of the Geological Society of Finland, 2011
Palaeomagnetic and anisotropy of magnetic susceptibility (AMS) studies were carried out on a orogenic gold deposit in Jokisivu, located in the western part of the Pirkanmaa Belt in the Svecofennian domain of southern Finland.
S. Mertanen, F. Karell
doaj   +1 more source

Peculiarities of pyrrhotite mineralization in the Chertovo Koryto deposit (Patom Uplands) [PDF]

, 2016
Pyrrhotite mineralization of black shale gold-ore deposit in the central part of Chertovo Koryto (Patom Uplands) was studied. It was found that pyrrhotite consists of three generations, containing hexagonal and monoclinic modifications in various ...
Kolbysheva, Yuliya Vladimirovna, Nepryakhina, O. B., Savinova, Olesya Vyacheslavovna, Sinkina, Ekaterina Andreevna   +3 more
core   +1 more source