Results 71 to 80 of about 112,950 (202)

Convective Instability in Intraplate Oceanic Mantle Caused by Amphibolite-Derived Garnet-Pyroxenites—A Xenolith Perspective (Hyblean Plateau, Sicily)

Geosciences, 2020
Geochemical characteristics of middle ocean ridge basalts (MORBs) testify partial melting of spinel-peridotite mixed with a few amounts of garnet-pyroxenite.
Vittorio Scribano, Serafina Carbone
doaj   +1 more source

Seismic Radial Anisotropy of the Southern Tibetan Rifts From Ambient Noise Adjoint Tomography: Basal Shear and Localized Crustal Weak Zones Promote Rifting

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract North–south‐trending rifts in southern Tibet record E–W extension within the Tibetan Plateau, closely linked to high gravitational potential energy from collisional thickening and northward underthrusting of the Indian lower crust. To reveal how basal shear is transmitted upward and controls rifting, we use ambient noise adjoint tomography ...
Taozhi Wang, Zhen Guo, Yanbin Wang, Lipeng He, Xiaobo Tian   +4 more
wiley   +1 more source

Tracing Continental Basalt Sources and Mantle Processes Using Fe Stable Isotopes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Iron (Fe) isotopes have emerged as powerful tracers of mantle source heterogeneity and melting processes, yet the mechanisms producing heavy Fe isotope signatures (high δ57Fe values) in intraplate basalts remain debated. Competing interpretations include partial melting of recycled pyroxenite domains versus carbonate‐induced oxidation of a ...
Yi‐Shan Cheng, Jian‐Qiang Liu, Li‐Hui Chen, Xun Yu, Gang Zeng, Xiao‐Jun Wang, Zhao‐Yang He, Jian Zhao, Frances M. Deegan, Valentin R. Troll, Hong‐Fu Zhang   +10 more
wiley   +1 more source

Hydrogen Contents of Mantle Minerals from Peridotite Xenoliths of Ichinomegata Volcano, NE Japan [PDF]

, 2010
application/pdfHydrogen contents of olivine, clinopyroxene, and orthopyroxene from peridotite and pyroxenite xenoliths from calc-alkaline andesite of Ichinomegata volcano have been measured by using FTIR technique.
LITASOV, Konstantin, TANIGUCHI, Hiromitsu   +1 more
core  

The evolution and ascent paths of mantle xenolith-bearing magma: Observations and insights from Cenozoic basalts in Southeast China [PDF]

, 2018
Studies have shown that mantle xenolith-bearing magmas must ascend rapidly to carry mantle xenoliths to the surface. It has thus been inferred inadvertently that such rapid ascending melt must have undergone little crystallization or evolution.
Jinju Liu, Huixia Cui, Lei Ye, Liu, Jinju, Pu Sun, Guo, Pengyuan, Yaoling Niu, Pengyuan Guo, Cui, Huixia, Niu, Yaoling, Sun, Pu, Ye, Lei   +11 more
core   +1 more source

Association of quartz, Cr-pyrope and Cr-diopside in mantle xenolith in V.Grib kimberlite pipe (northern East European Platform): genetic models

Записки Горного института
The first results of mineralogical and geochemical studies of a unique xenolith of lithospheric mantle are presented illustrating the earlier non-described mineral association of quartz, Cr-pyrope and Cr-diopside.
Elena V. Agasheva, Denis S. Mikhailenko, Andrei V. Korsakov   +2 more
doaj  

How Cratonic Roots Survive With Weak Mid‐Lithosphere Discontinuities

Geophysical Research Letters
The stability of cratons has long been attributed to their neutral buoyancy and strong roots. However, recent seismic studies have revealed widespread mid‐lithospheric discontinuities (MLDs) within cratonic roots.
Qionghua Guo, Huilin Wang, Honglei Liu
doaj   +1 more source

The composition and distribution of the rejuvenated component across the Hawaiian plume: Hf‐Nd‐Sr‐Pb isotope systematics of Kaula lavas and pyroxenite xenoliths

Geochemistry, Geophysics, Geosystems, 2013
Rejuvenated volcanism refers to the reemergence of volcanism after a hiatus of 0.5–2 Ma following the voluminous shield building stage of Hawaiian volcanoes.
Michael Bizimis, Vincent J. M. Salters, Michael O. Garcia, Marc D. Norman   +3 more
doaj   +1 more source

Lithosphere Structure and Thermal Regime of the Upper Mantle along Baikal Rift Axis : Evidences from Deep-Seated Xenoliths [PDF]

, 2010
application/pdfA detailed microprobe study has been carried out on several xenolith suites along the axial part of the Baikal rift system, including Oka (Sayan), Tunka, Hamar-Daban, and Udokan volcanic fields.
LITASOV, Konstantin, LITASOV, Yury, ITO, Yoshinori, KITAKAZE, Arashi, TANIGUCHI, Hiromitsu   +4 more
core  

Temperatures in ambient mantle and plumes: Constraints from basalts, picrites, and komatiites [PDF]

, 2006
Several methods have been developed to assess the thermal state of the mantle below oceanic ridges, islands, and plateaus, on the basis of the petrology and geochemistry of erupted lavas. One leads to the conclusion that mantle potential temperature (i.e.
Lesher, C. M., P. D. Asimow (4380079), Niu, Yaoling, A. D. Saunders (7585886), Lesher, C.M., Arndt, N., Herzberg, C., C. Herzberg (10061344), Fitton, J.G., Fitton, J. G., Asimow, Paul D., Y. L. Niu (10061347), C. M. Lesher (7733825), Asimow, P.D., J. G. Fitton (7585871), Saunders, A.D., Saunders, A. D., Arndt, Nicholas, N. Arndt (8870258), Michael Cheadle (10060309), Cheadle, M. J., Cheadle, M.J., Niu, Y. L., Niu, Y., Asimow, P. D., Cheadle, Michael   +25 more
core   +1 more source