Results 21 to 30 of about 53,703 (183)

Lithium Isotopic Compositions of Mesozoic and Cenozoic Basalts From South-Eastern China: Implications for Extremely Low δ7Li of Continental-Type Eclogites

Frontiers in Earth Science, 2022
Lithium isotope geochemical studies of oceanic-type eclogites benefited from previous investigation of altered oceanic crust; however, processes of lithium isotope exchange operating on altered protoliths of continental-type eclogites have remained ...
Cheng-Long Yu, Yilin Xiao, Yilin Xiao, Yang-Yang Wang, Olivier Nadeau, He Sun, He Sun, Hong-Qiong Wan, Dong-Yong Li, Xiao-Xia Wang, Dong-Bo Tan   +10 more
doaj   +1 more source

BIF-hosted high-grade magnetite iron ore targeting by hyperspectral wavelength mapping of chlorite: case study of Qidashan Iron Mine, northeast China

Geocarto International, 2023
There are two kinds of chlorites occurred in Anshan area, among which the hydrothermal Fe-chlorite with longer Fe-OH wavelength is spatially related to the high-grade magnetite ore, meaning that wavelength mapping of chlorites can be used to target the ...
Yuzeng Yao, Zining Li, Jing Liu, Jianfei Fu, Tingting Hou, Yongli Zhang   +5 more
doaj   +1 more source

REEVALUATION OF KAOLINITE OCCURRENCE IN SOME TORRIFLUVENTS IRAQI SOIL [PDF]

مجلة الأنبار للعلوم الزراعية, 2021
Clay fraction of Torrifluvents Iraqi soils contained different clay mineral groups. Usually, samples with limited number of clay minerals, can be defined mainly by x-ray diffraction analysis.
R. Al-Tamimi
doaj   +1 more source

Direct dating of mid-crustal shear zones with synkinematic allanite:new in situ U-Th-Pb geochronological approaches applied to the Mont Blanc massif [PDF]

, 2013
International audienceDating the timing of motion on crustal shear zones is of tremendous importance for understanding the assembly of orogenic terranes.
Cenki-tok, Benedicte, Darling, James, Dhuime, Bruno, Rolland, Yann, Storey, Craig   +4 more
core   +3 more sources

Widespread abiotic methane in chromitites [PDF]

, 2018
Recurring discoveries of abiotic methane in gas seeps and springs in ophiolites and peridotite massifs worldwide raised the question of where, in which rocks, methane was generated.
Etiope, G., Ifandi, E., Nazzari, M., Procesi, M., Steele, A., Szatmari, P., Tardini, R., Tsikouras, B., Ventura, G.   +8 more
core   +1 more source

Chlorite geochemical vectoring of ore bodies: a natural kind clustering approach

Frontiers in Earth Science, 2023
Chlorite has long been considered a mineral group likely to have different trace element chemistry with proximity to mineralization, and therefore can be used to vector towards ore bodies.
Nicole Freij, Daniel David Gregory, Shuang Zhang, Shaunna M. Morrison   +3 more
doaj   +1 more source

Cap rock efficiency of geothermal systems in fold-and-thrust belts: Evidence from paleo-thermal and structural analyses in Rosario de La Frontera geothermal area (NW Argentina) [PDF]

, 2016
Cap rock characterization of geothermal systems is often neglected despite fracturing may reduce its efficiency and favours fluid migration. We investigated the siliciclastic cap rock of Rosario de La Frontera geothermal system (NW Argentina) in order to
Aldega, L., Bigi, S., Chiodi, Agostina Laura, Corrado, Sveva, Di Paolo, L., Giordano, G., Invernizzi, C., Maffucci, R.   +7 more
core   +2 more sources

Characteristics of chlorites from the Haopinggou Ag–Au polymetallic deposit in the Xiong’ershan ore concentration area and its exploration implications

Dizhi lixue xuebao
Objective  The Haopinggou Ag-Au polymetallic deposit is a typical intermediate-sulfidation epithermal deposit in the Xiong'ershan ore concentration area. Ag-Pb-Zn mineralization mainly occurs in steeply dipping veins and breccia matrix.
LIU Songyan, ZHANG Da, YANG Mingjian, ZHANG Xinming, WEI Guodong, NIE Shengqiang, WANG Xuan, FENG Yanping, LI Wenjie, CHEN Guilan   +9 more
doaj   +1 more source

Dehydroxylation Kinetics of Clay Minerals and Its Application to Friction Heating Along an Imbricate Thrust in an Accretionary Prism

Geochemistry, Geophysics, Geosystems, 2018
Dehydroxylation of clay minerals within fault gouges is significant for assessing transient thermogenesis due to high‐velocity, frictional slip along fault zones.
Hirokazu Masumoto, Jun Kameda, Hiroshi Arima, Kazumasa Sugiyama, Takaya Nagai, Yuzuru Yamamoto   +5 more
doaj   +1 more source

Characterization of potassic alteration in the Iju porphyry copper deposit using mineral chemistry of biotite and chlorite [PDF]

پترولوژی, 2018
The Iju porphyry copper deposit is located 72 km NE of Shahr-e- Babak in the western part of the Dehaj - Sardueih zone in the Kerman Cenozoic volcano - plutonic belt.
Alireza Zarasvandi, Mohsen Rezaei, Houshang Pourkaseb, Sina Asadi, Amir Mortaza Azimzadeh   +4 more
doaj   +1 more source