Results 11 to 20 of about 10,706 (208)

Olivine-rich achondrites from Vesta and the missing mantle problem

Nature Communications, 2021
Ultramafic olivine-rich achondrites provide insight into the missing mantle problem in the asteroid belt. The petrology and geochemistry of these samples suggests they are related to Vesta or the Vestoids.
Zoltan Vaci, James M. D. Day, Marine Paquet, Karen Ziegler, Qing-Zhu Yin, Supratim Dey, Audrey Miller, Carl Agee, Rainer Bartoschewitz, Andreas Pack   +9 more
doaj   +1 more source

Serpentinites of Different Tectonic Origin in an Exhumed Subduction Complex (New Caledonia, SW Pacific)

Geochemistry, Geophysics, Geosystems, 2022
Owing to the importance of serpentinites for planetary geochemical and geodynamic processes, there has been much work discerning the origins of their parent rocks, including distinguishing between serpentinites derived from a subducting plate versus ...
Natalie H. Raia, Donna L. Whitney, Christian Teyssier, Stéphane Lesimple   +3 more
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Thermoelastic Properties of Liquid Fe‐Rich Alloys Under Martian Core Conditions

Geophysical Research Letters, 2023
Seismic measurements made on Mars indicate that the liquid iron‐nickel core is rich in light elements; however, the effects of these light components on the elasticity of Mars’ core remain poorly constrained.
D. Huang, Y. Li, A. Khan, P. Sossi, D. Giardini, M. Murakami   +5 more
doaj   +1 more source

Insights into the Tethyan mantle heterogeneity: Trace element evidence from the Karakaya Complex, Central Anatolia

Geosystems and Geoenvironment, 2023
Highlights: • Strong Nb-kick originates from metasomatized oceanic lithospheric mantle (OLM). • Metasomatized OLM is a plume-related material causing Tethyan mantle heterogeneity.
Kaan Sayit
doaj   +1 more source

Long-term memory of subduction processes in the lithospheric mantle: evidence from the geochemistry of basic dykes in the Gardar Province of South Greenland [PDF]

, 2002
The rift-related magmas of the Proterozoic Gardar Igneous Province were emplaced across the contact between the South Greenland Archaean craton and the Palaeoproterozoic Ketilidian mobile belt.
R. M. Ellam, Goodenough, K.M., Ellam, R.M., K. M. Goodenough, Ellam, R, Upton, B.G.J., B. G. J. Upton   +6 more
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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

Copper isotope evidence for large-scale sulphide fractionation during Earth’s differentiation [PDF]

, 2015
The differentiation of Earth into a metallic core and silicate mantle left its signature on the chemical and isotopic composition of the bulk silicate Earth (BSE).
Savage, P.S., Siebert, J., Badro, J., Moynier, F., Puchtel, I.S., Chen, H., Savage, Paul S., Shofner, G.   +7 more
core   +1 more source

Origin and Age of Magmatism in the Northern Philippine Sea Basins

Geochemistry, Geophysics, Geosystems, 2022
A Robust tectonic reconstruction of the Philippine Sea Plate around ∼52 Ma is a prerequisite in understanding the process of subduction initiation and establishment of the Izu‐Bonin‐Mariana arc.
Osamu Ishizuka, Kenichiro Tani, Rex N. Taylor, Susumu Umino, Izumi Sakamoto, Yuka Yokoyama, Gen Shimoda, Yumiko Harigane, Yasuhiko Ohara, Chris E. Conway, Americus Perez, Shun Sekimoto   +11 more
doaj   +1 more source

Tiny droplets of ocean island basalts unveil Earth’s deep chlorine cycle

Nature Communications, 2019
Volatile exchange between the Earth’s interior and surface layers is one of the central issues in mantle geochemistry. Here the authors present evidence that chlorine is transferred from the surface to the deep mantle by subducted oceanic crust, forming ...
Takeshi Hanyu, Kenji Shimizu, Takayuki Ushikubo, Jun-Ichi Kimura, Qing Chang, Morihisa Hamada, Motoo Ito, Hikaru Iwamori, Tsuyoshi Ishikawa   +8 more
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Deep Drilling into a Mantle Plume Volcano: The Hawaii Scientific Drilling Project [PDF]

Scientific Drilling, 2009
Oceanic volcanoes formed by mantle plumes, such as those of Hawaii and Iceland, strongly influence our views about the deep Earth (Morgan, 1971; Sleep, 2006).
Donald M. Thomas, Donald J. DePaolo, Edward M. Stolper   +2 more
doaj   +1 more source