Results 61 to 70 of about 65,247 (280)

A numerical study of the dynamics of subduction [PDF]

, 1988
The mechanics and dynamics of subduction have been studied using 2-D finite element analysis. Two finite element formulations have been employed; one formulation for Newtonian viscous flow and one formulation for linear elasticity and viscoelasticity ...
Whittaker, A.
core  

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

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

Interlacing ruptures of the 2024 Wushi earthquake (Chinese Tian Shan) controlled by structural inheritance

Communications Earth & Environment
The 2024 Mw 7.0 Wushi earthquake is the largest earthquake within the seismically active Tian Shan during the past three decades. Through integrated analyses of seismic, geodetic, and geologic data, here we investigate the fault structure corresponding ...
Xinzhong Yin, Tao Li, Yingfeng Zhang, Zhigang Peng, Luca Dal Zilio, Zhuxin Chen, Huawei Cui, Li Qian, Xiao Sun, Renqi Lu, Biao Guo, Wenxin Yang, Jiuhui Chen, Jie Chen   +13 more
doaj   +1 more source

Noble Metals in Arc Basaltic Magmas Worldwide: A Case Study of Modern and Pre-Historic Lavas of the Tolbachik Volcano, Kamchatka

Frontiers in Earth Science, 2021
Platinum-group elements (PGE) and gold are a promising tool to assess the processes of mantle melting beneath the subduction zones. However, fractionation processes in magmas inevitably overwrite the initial metal budgets of magmas, making constraints on
Anton Kutyrev, Anton Kutyrev, Michael Zelenski, Nikolai Nekrylov, Nikolai Nekrylov, Dmitry Savelyev, Alkiviadis Kontonikas-Charos, Vadim S. Kamenetsky, Vadim S. Kamenetsky   +8 more
doaj   +1 more source

Mesoscale subduction at the Almeria-Oran front. Part 1: ageostrophic flow [PDF]

, 2001
This paper presents a detailed diagnostic analysis of hydrographic and current meter data from three, rapidly repeated, fine-scale surveys of the Almeria-Oran front.
Ruiz, S., Tintore, J., Allen, J.T., J. Tintoré, Smeed, David, D. A. Smeed, S. Ruiz, Ruiz, Simón, Tintoré, Joaquín, Allen, John T., Smeed, D.A., J. T. Allen   +11 more
core   +1 more source

Kinematic Boundary Conditions Favouring Subduction Initiation at Passive Margins Over Subduction at Mid-oceanic Ridges [PDF]

, 2021
International audienceWe perform numerical modelling to simulate the shortening of an oceanic basin and the adjacent continental margins in order to discuss the relationship between compressional stresses acting on the lithosphere and the time dependent ...
Beekman, F., Auzemery, Antoine, Willingshofer, Ernst, Willingshofer, E., Auzemery, A., Duretz, Thibault, Duretz, T., Yamato, Philippe, Yamato, P., E. Willingshofer, Research Programme in Earth Sciences Utrecht (DES / IVAU), F. Beekman, Utrecht Centre for Earth & Planetary Processes (UCEPP, in development), Tectonics, P. Yamato, T. Duretz, A. Auzemery   +16 more
core   +1 more source

Multiphase Tectonic Process With Slab Dynamics in the Northern East China Sea Shelf Basin

Geological Journal, EarlyView.
Megasequence 1 characterised by Palaeocene extension and differential subsidence driven by the rollback of the subducting Izanagi Plate. Megasequence 2 records a kinematic reorganisation of the East Asian margin, transition from a rifting to a compressional regime.
Juhwan Woo, Won‐Ki Kim, Chul Woo Rhee, Seungyeol Lee   +3 more
wiley   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +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