Results 51 to 60 of about 18,656 (273)

Basalt Geochemistry and Mantle Flow During Early Backarc Basin Evolution: Havre Trough and Kermadec Arc, Southwest Pacific

Geochemistry, Geophysics, Geosystems, 2021
The Havre Trough (HT) backarc basin in the southwest Pacific is in the rifting stage of development. We distinguish five types of basalt there based on their amount and kind of slab component: backarc basalts (BAB) with little or no slab component ...
J. Gill, K. Hoernle, E. Todd, F. Hauff, R. Werner, C. Timm, D. Garbe‐Schönberg, M. Gutjahr   +7 more
doaj   +1 more source

Is the Suez Rift in Its Post‐Rift Phase?

Geophysical Research Letters
Abstract Failed rifts are widely assumed to enter post‐rift tectonic quiescence after termination of intracontinental rifting, but a comprehensive understanding of their regional morphotectonics is lacking. Our quantitative, rift‐scale geomorphic analyses in the Suez Rift, an archetypal failed rift in Egypt, reveals widespread rifting
David Fernández-Blanco, Gino de Gelder, Christopher Jackson   +2 more
openaire   +1 more source

(D)rifting in the 21st century: key processes, natural hazards, and geo-resources [PDF]

Rifting and continental break-up are major research topics within geosciences, and a thorough understanding of the processes involved as well as of the associated natural hazards and natural resources is of great importance to both science and society ...
Phetham, Jordan J. J., Brune, Sascha, Mohamed Gouiza, Patricia Cadenas, Phethean, J., Anne C. Glerum, Cadenas, Patricia, Frank Zwaan, Sascha Brune, Zwaan, Frank, Gouiza, Mohamed, Alves, Tiago M., Glerum, Anne C., Tiago M. Alves   +13 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

Local Strain Reorientation Explains Deformation of Rift-oblique Tectonic Lineaments Along the Main Ethiopian Rift

Tektonika
 The interaction between the NE-SW striking Main Ethiopian Rift (MER) and the E-W oriented Yerer-Tullu Wellel Volcano-tectonic lineament (YTVL) represents one of the least understood tectonic problems in the East African Rift System.
Frank Zwaan, Ameha Atnafu Muluneh, Jun Liu, Ehsan Kosari, Matthias Rosenau, Giacomo Corti, Federico Sani   +6 more
doaj   +1 more source

Anelastic deformation in Iceland studied using GPS: with special reference to post-tectonic motion following the 1975-1985 krafla rifting episode, and isostatic rebound [PDF]

, 1995
The Krafla volcanic system is a spreading segment in north Iceland. A decade-long crustal spreading episode began there in 1975. Up to 8 m of rift-normal surface widening occurred along an 80-90 km-long section of the plate boundary.
Hofton, Michelle Anne
core  

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

The Southwestern Rift of Africa: isotopic evidence of early-stage continental rifting

Frontiers in Earth Science
Helium and carbon isotope data (3He/4He = 0.14–0.17 R/Ra; δ13C(CO2) = −3.9‰) from hydrothermal springs within the Kafue Rift of Zambia provide the first geochemical characterization of thermal springs along a broad extensional zone connecting the African
Rūta Karolytė, Michael C. Daly, Peter Vivian-Neal, Darren Hillegonds, Long Li, Barbara Sherwood Lollar, Barbara Sherwood Lollar, Chris J. Ballentine   +7 more
doaj   +1 more source

Faulting and Extension Rate over the last 20,000 Years in the Offshore Whakatane Graben, New Zealand Continental Shelf.

, 2006
Oblique rifting in the offshore Taupo Volcanic Zone, New Zealand, is expressed in widely distributed active normal faulting in the 20 km-wide Whakatane Graben.
Lamarche, G., Jonathan M. Bull, Philip M. Barnes, Geoffroy Lamarche, Bull, J.M., Barnes, P.M.   +5 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