Results 51 to 60 of about 99,145 (282)

A Comparative Study of the Sumatran Subduction-Zone Earthquakes of 1935 and 1984 [PDF]

, 2002
A M_s 7.7 earthquake struck the western, equatorial coast of Sumatra in December 1935. It was the largest event in the region since the two devastating giant earthquakes of 1833 and 1861.
Helmberger, Don, Natawidjaja, Danny, Rivera, Luis, Sieh, Kerry   +3 more
core   +1 more source

Replacement of Ores Recorded by Textures and Chemical Compositions of Sphalerite: An Example From the Furutobe Kuroko Deposit, Akita, Japan

Geological Journal, EarlyView.
Coupled dissolution‐reprecipitation of early formed Cd‐, Fe‐, Ag‐ and Sb‐poor sphalerite through interaction with high‐temperature and high‐sulphur fugacity Cu‐rich fluids, responsible for the formation of the yellow ores, resulted in the formation of Cd‐, Fe‐, Ag‐ and Sb‐rich, heavily chalcopyrite‐diseased sphalerite and enrichment of critical metals ...
Manuel Nopeia, Ryohei Takahashi, Andrea Agangi, Pearlyn Manalo, Hinako Sato   +4 more
wiley   +1 more source

Upper- and mid-mantle interaction between the Samoan plume and the Tonga-Kermadec slabs [PDF]

, 2016
Mantle plumes are thought to play a key role in transferring heat from the core\u2013mantle boundary to the lithosphere, where it can significantly influence plate tectonics. On impinging on the lithosphere at spreading ridges or in intra-plate settings,
AM Dziewoński, AM Volpe, AMG Ferreira, C Bassin, C DeMets, D Mainprice, D Mainprice, D Mainprice, D Zhao, DL Kohlstedt, E Kaminski, ER Engdahl, FA Capitanio, G Morra, GS Robertson, H Takeuchi, H-R Wenk, J Gill, J Ritsema, J Wookey, JAD Connolly, JE Lupton, JH Woodhouse, JH Woodhouse, JH Woodhouse, KA Druken, M Bevis, M Faccenda, M Faccenda, M Faccenda, M Gurnis, MG Jackson, ML Lytle, MS Thorne, N Schmerr, OL Anderson, P Carrez, P Cordier, PG Betts, PG Betts, R Hall, RJ Poreda, S Turner, S-J Chang, S-J Chang, SR Hart, SW French, UR Christensen, W Rodi, W-P Chen, WG Mason, WP Schellart, WP Schellart, Y Fukao, Y Lagabrielle   +54 more
core   +2 more sources

Notable Impact of Paleotectonic Stress on Gold Mineralisation in the West Qinling Orogen

Geological Journal, EarlyView.
By applying fuzzy clustering and multiple inverse methods, we systematically processed the data of vein and fault slip in this ore deposit to reveal the transition of orogenic geological environment and paleotectonic stress field. Our research results show two different stress states: the northwest–southeast extensional stress field and the northeast ...
Hongyan Wang, Aibing Chen, Jian Yang, Yuan Zhang   +3 more
wiley   +1 more source

Contrasting magma chemistry in the Candelaria IOCG district caused by changing tectonic regimes

Scientific Reports
Iron oxide-copper-gold (IOCG) deposits are a vital source of copper and critical elements for emerging clean technologies. Andean-type IOCG deposits form in continental arcs undergoing extension, and they have a temporal relationship with magmatism ...
R. Romero, F. Barra, M. Reich, A. Ojeda, M. J. Tapia, I. del Real, A. Simon   +6 more
doaj   +1 more source

Dynamic evolution of changbaishan volcanism in Northeast China illuminated by machine learning

Frontiers in Earth Science, 2023
Previous studies propose that there is a mantle upwelling that generated the Cenozoic basalts in Changbaishan. However, the dominant source and mechanism of the mantle upwelling remains highly debated.
Yong Zhao, Yong Zhao, Yigang Zhang, Dongdong Ni, Dongdong Ni   +4 more
doaj   +1 more source

A reduced subduction graph and higher multiplicity in S_n transformation coefficients

, 2006
Transformation coefficients between {\it standard} bases for irreducible representations of the symmetric group $S_n$ and {\it split} bases adapted to the $S_{n_1} \times S_{n_2} \subset S_n$ subgroup ($n_1 +n_2 = n$) are considered.
Butler P H, Chen J Q, Chen J Q, Chilla V, Elliot J P, Fulton W, Haase R W, Kaplan I G, Kramer P, McAven L F, McAven L F, McAven L F, Pan F, Suryanarayana C, Vincenzo Chilla, Wolfram S   +15 more
core   +1 more source

Geochemical and Geological Investigation of Skarn‐Type Pb–Zn Mineralization in Hastanetepe (Balya‐Balıkesir, Türkiye): An Approach Based on Fluid Inclusions, Sulphur Isotopes and Geochemical Data

Geological Journal, EarlyView.
Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley   +1 more source

Dynamics of subduction initiation with different evolutionary pathways [PDF]

, 2011
Changes of plate motion may have induced subduction initiation (SI), but the tectonic history of SI is different from one subduction zone to another. Izu-Bonin-Mariana (IBM) SI, accompanied by strong backarc spreading and voluminous eruption of Boninites,
Gurnis, Michael, Leng, Wei
core   +1 more source

Raman Line Scan Analyses and a New Hypothesis for the Formation of Anatase‐Hosting Microbialites: Study of the Stromatolites From Saint‐Jean‐de‐la‐Rivière, Cotentin, France

Journal of Raman Spectroscopy, EarlyView.
Micrometer analysis of millimeter lines of Raman spectra concludes in the association of anatase and graphitized organic matter (graphogen). The photosynthetic microorganisms at the origin of the microbialites produce O2, which is transformed by TiO2 into reactive species that, in turn, decompose the organic matter of the microorganisms. ABSTRACT Raman
Marie‐Paule Bassez
wiley   +1 more source