Results 51 to 60 of about 517 (188)

New constraints from ²⁶Al-²⁶Mg chronology of anorthite bearing chondrules in unequilibrated ordinary chondrites. [PDF]

Geochim Cosmochim Acta, 2021
Siron G, Fukuda K, Kimura M, Kita NT.
europepmc   +1 more source

Active Plume, Abandoned Ridge, or Ancient Slab? olivine‐Hosted Melt Inclusions Record the Mantle Melting Conditions Below the East Pacific Revillagigedo Archipelago, Mexico

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract The voluminous active volcanoes of the Revillagigedo Islands of Socorro and San Benedicto in the east Pacific Ocean exhibit hotspot geochemistry. However, the presence of a deep mantle plume has not been seismologically confirmed. Instead, a fossil subducted slab is identified in the lower mantle underneath the volcanoes. Moreover, the islands
Janne M. Koornneef, Laurens J. J. Tromp, Igor K. Nikogosian, Eva M. Barning, Arwen Deuss, Yamirka Rojas‐Agramonte, Pablo Davilla Harris, Douwe J. J. van Hinsbergen   +7 more
wiley   +1 more source

Testing the Bus–DeMeo Asteroid Taxonomy Using Meteorite Spectra

The Planetary Science Journal
The most widely used method to spectrally classify asteroids is the Bus–DeMeo taxonomy. To test how well the Bus–DeMeo taxonomy groups asteroids on the basis of their mineralogy, we have classified ∼1500 meteorite spectra using this Bus–DeMeo system ...
Thomas H. Burbine, Iman Khanani, Deepika Kumawat, Ahlay Hussain, Sydney M. Wallace, M. Darby Dyar   +5 more
doaj   +1 more source

Episodic Rifting of a Large Igneous Province Concentrated Along a Microcontinent Boundary

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Many large igneous provinces (LIPs) comprise once contiguous magmatic products that are now fragmented across multiple tectonic plates. Emplacement of these voluminous magmatic products is commonly coeval with, or shortly followed by, fragmentation into constituent domains.
Jeremy L. Asimus, Hugo K. H. Olierook, Sally A. Gibson, Joanne M. Whittaker, Jacqueline A. Halpin, Nathan R. Daczko, Millard F. Coffin, Daniel E. Heaton, Anthony A. P. Koppers, Kaj Hoernle, Folkmar Hauff, Ivan Belousov   +11 more
wiley   +1 more source

Two-source Terrestrial Planet Formation with a Sweeping Secular Resonance

The Astronomical Journal
The models that most successfully reproduce the orbital architecture of the solar system terrestrial planets start from a narrow annulus of material that grows into embryos and then planets.
Max Goldberg, David Nesvorný, Alessandro Morbidelli   +2 more
doaj   +1 more source

Geology, mineralization and geochemistry of the Aqkand Cu occurrence (north of Zanjan, Tarom-Hashtjin zone)

Journal of Economic Geology, 2017
Introduction The Aqkand Cu occurrence, 48 km north of Zanjan, is located in the Tarom subzone of the Western Alborz-Azerbaijan structural zone. Apart from small scale geological maps of the area, i.e., 1:250,000 geological maps of Bandar-e-Anzali ...
Maryam Feyzi, Mohammad Ebrahimi, Hossein Kouhestani, Mir Ali Asghar Mokhtari   +3 more
doaj   +1 more source

Mantle Dynamic Topography of the Fringing Oceanic Basins of Antarctica

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Dynamic mantle processes are known to influence oceanic basins with implications for ocean circulation and climate. This study exploits an interdisciplinary approach to probe present‐day mantle and lithosphere beneath Antarctica's fringing oceanic basins to better understand sub‐crustal processes and implications for the continental realm.
A. C. A. Dunn, N. J. White, R. Larter, P. L. Slay, M. C. Holdt   +4 more
wiley   +1 more source

Geology, geochemistry and fluid inclusion of Qarachilar Cu-Mo-Au quartz veins, northeast of Kharvana, East Azerbaijan

Journal of Economic Geology, 2018
Introduction The Qarachilar Cu-Mo-Au occurrence is located in the Arasbaran ore zone (AZ), NW Iran, some 70 km north of Tabriz. The AZ is characterized by occurrence of different types of mineralization and hosts many Cu-Mo porphyry (PCD), Cu skarn, and
Fariba Asiay Soufiani, Mir Ali Asghar Mokhtari, Hossein Kouhestani, Amir Morteza Azimzadeh   +3 more
doaj   +1 more source

The Efficient Delivery of Highly Siderophile Elements to the Core Creates a Mass Accretion Catastrophe for the Earth

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The excess abundance of highly siderophile elements (HSEs), as inferred for the terrestrial planets and the Moon, is thought to record a “late veneer” of impacts after the giant impact phase of planet formation. Estimates for total mass accretion during this period typically assume all HSEs delivered remain entrained in the mantle.
Richard J. Anslow, Maylis Landeau, Amy Bonsor, Jonathan Itcovitz, Oliver Shorttle   +4 more
wiley   +1 more source

The effect of early diagenetic processes on the quantification of fossil micrometeorite abundance and flux in the geological record

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 551-564, April 2026.
Abstract Fossil micrometeorites (MMs) recovered from lithified sedimentary rocks, particularly iron‐rich (I‐type) cosmic spherules (CSs) provide valuable insights into past dust‐forming events. Their abundances, when combined with estimates of local sedimentation rates can be used to reconstruct the flux of extraterrestrial dust.
Isabelle S. Mattia, Matthew J. Genge, Martin D. Suttle   +2 more
wiley   +1 more source