Results 141 to 150 of about 87,697 (345)

The Age and Composition of the Voyager Seamounts: Evidence for a Long‐Lived Marquesas Mantle Source

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract We present new observations on the dynamics and locations of deep mantle reservoirs derived from the ages and compositions of Voyager Seamount Chain lava flows. The previously unexplored Voyager Seamount Chain trends NW–SE between the Mid‐Pacific Mountains and the Northwestern Hawaiian Ridge.
Andrea Balbas, Hannah Paradis, Kevin Konrad, Valerie A. Finlayson, Michael Bizimis, Stephanie Anderson, Christopher Kelley, Nicole A. Raineault, Beth N. Orcutt   +8 more
wiley   +1 more source

Trace element composition of silicate minerals from Kunashak Meteorite (L6)

Записки Горного института
Major (EPMA) and trace (SIMS) element geochemistry in the silicate minerals (olivine, pyroxene and plagioclase) of Kunashak equilibrated ordinary chondrite (L6) is described. No variations in the major element concentrations of the silicate minerals have
Kristina G. Sukhanova, Olga L. Galankina
doaj  

How Strong/Weak Is Epidote Relative to Plagioclase?

Geochemistry, Geophysics, Geosystems
In natural lower crustal rocks, we observe that plagioclase breakdown is often partial as evidenced by the presence of epidote‐group minerals and the absence of the remaining reaction products for example, kyanite and quartz.
Sarah Incel, Lisa Katharina Mohrbach, Jörg Renner   +2 more
doaj   +1 more source

Tafassasset: The Saga Continues [PDF]

, 2008
In this study, we compare data for two separate Tafassasset stones and supply new oxygen isotope data for our sample. We include a discussion of the debate surrounding the classification of Tafassasset and offer a hypothesis for its origin based upon new
Franchi, I. A., Gardner-Vandy, K. G., Greenwood, R. C., Killgore, M., Lauretta, D. S.   +4 more
core  

Voluminous Inflated Lobate Flows on the Distal Rift Zones of Axial Seamount, Juan de Fuca Spreading Ridge

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract Three voluminous inflated lobate lava flow complexes on the distal rifts of Axial Seamount are much larger than other known flows in the global spreading system. Each complex is 65–100 km2, is up to 130 m thick, and is ∼3.0–4.6 km3, almost 100 times the volumes of historical Axial flows.
Jennifer B. Paduan, David A. Clague, David W. Caress, Ryan Portner, Morgane Le Saout, Brian Dreyer   +5 more
wiley   +1 more source

Local strain heterogeneity associated with Al/Si ordering in anorthite, CaAl2Si2O8, with implications for thermodynamic mixing behavior and trace element partitioning in plagioclase feldspars

, 2023
Alison J. Atkinson, Tiziana Boffa Ballaran, Michael A. Carpenter   +2 more
openalex   +1 more source

Experimental phase equilibria constraints on pre-eruptive storage conditions of the Soufreiere Hills magma [PDF]

, 1998
Aspinall, Devine, Devine, Devine, Donovan, Fine, Geschwind, J. Barclay, J. D. Devine, J. Gardner, M. D. Murphy, M. J. Rutherford, M. R. Carroll, Martel, Moore, Moore, Murphy, Newman, R. S. J. Sparks, Rutherford, Young, Young   +21 more
core   +1 more source

Trace element partitioning between plagioclase and silicate melt: The importance of temperature and plagioclase composition, with implications for terrestrial and lunar magmatism

, 2017
Chenguang Sun, M. Graff, Yan Liang
semanticscholar   +1 more source

From the Bottom Up: Calculating Mantle‐Derived Magma Flux Using Subduction Parameters and Petrologic Constraints at Oceanic Arcs

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract Mantle‐derived magma flux has a first‐order control on long‐term volcanic productivity, volatile cycling, and crustal growth in convergent margins. However, the factors controlling it remain unclear. We used a simplified, 3D conceptualization of an intraoceanic subduction zone and petrologic constraints on mantle melting to calculate mantle ...
A. E. Goltz, C. B. Till, A. J. R. Kent
wiley   +1 more source

The Superstructure of Intermediate Plagioclase

, 1975
Masao Kitamura, Nobuo Morimoto
openalex   +2 more sources