Results 71 to 80 of about 22,040 (302)

Application of thermodynamic modelling to natural mantle xenoliths:examples of density variations and pressure–temperature evolution of the lithospheric mantle [PDF]

open access: yes, 2016
In this paper, we show how the results of phase equilibria calculations in different mantle compositions can be reconciled with the evidence from natural man- tle samples. We present data on the response of bulk rock density to pressure (P), temperature (
Klemme, Stephan, Ziberna, Luca
core   +3 more sources

Evidence for suboceanic small-scale convection from a “garnet”-bearing lherzolite xenolith from Aitutaki Island, Cook Islands

open access: yesProgress in Earth and Planetary Science
Garnet peridotite xenoliths have been rarely reported from suboceanic mantle. Petrographic and geochemical characteristics of garnet-bearing oceanic peridotite xenoliths provide precious information on dynamics of the suboceanic lithosphere and ...
Norikatsu Akizawa   +14 more
doaj   +1 more source

Ultrahigh‐Temperature Metamorphism and Near‐Isobaric Cooling of Garnet‐Orthopyroxene Granulite Xenoliths in the Sancheong Anorthosite, Yeongnam Massif, Korea

open access: yesJournal of Metamorphic Geology, Volume 44, Issue 1, Page 20-46, January 2026.
ABSTRACT Elevated heat flow associated with mafic magmatism in accretionary orogens has often been proposed as a driving mechanism for (ultra)high‐temperature (UHT) metamorphism and anatexis. The Sancheong–Hadong complex, located in the southern Yeongnam Massif, Korea, consists of a ca.
Yuyoung Lee   +3 more
wiley   +1 more source

Lithogeochemistry and 3D geological modeling of the apatite-bearing Mesquita Sampaio beforsite, Jacupiranga alkaline complex, Brazil

open access: yesBrazilian Journal of Geology, 2020
The Mesquita Sampaio beforsite is a mineral exploration area with apatite mineralization occurring near the northern portion of the Morro da Mina apatite deposit (Cajati Mine), in the Jacupiranga Alkaline Complex.
Saulo Batista de Oliveira   +1 more
doaj   +1 more source

Temperatures in a sinking xenolith [PDF]

open access: yesEos, Transactions American Geophysical Union, 1937
The manuscript for this paper was not submitted.
openaire   +2 more sources

Modeling enstatite chondrites: Reduced rocks with a pinch of oxidized material (affected by varying H2O(g)) derived from planetesimals shocked during the epoch of giant–planet migration

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 1, Page 122-139, January 2026.
Abstract The O‐, N‐, Mo‐, Ru‐, Os‐, Cr‐, Ti‐, Ni‐, Fe‐, Nd‐, Ca‐, Zn‐, Sr‐, and Mg‐isotopic compositions of enstatite chondrites are essentially identical to those of the Earth and Moon. These correspondences suggest enstatite chondrites formed at ≈1 AU as the only known chondrite groups that accreted in the vicinity of a major planet. Bulk Earth has a
Alan E. Rubin
wiley   +1 more source

Magnetotelluric Imaging of a Magma Plumbing System From the Asthenosphere to Crust Beneath the Newer Volcanic Province, Australia

open access: yesGeophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract The Newer Volcanic Province (NVP) in southeastern Australia is a classic example of continental intraplate volcanism located far from a plate boundary, yet the configuration of its magma plumbing system remains unclear. Using three‐dimensional (3D) magnetotelluric (MT) inversion, we imaged a vertically continuous, trans‐lithospheric conductive
Xinpeng Ma   +7 more
wiley   +1 more source

The Buoyancy of Cratonic Lithospheric Mantle

open access: yesGeophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Cratons are generally thought to be characterized by stable, long‐lived mantle roots. However, recent studies have suggested that the lithospheric mantle may be prone to removal, implying that it may be denser than the asthenosphere. To address these suggestions, we use a global data set of mantle xenoliths to estimate the density structure of
Z. J. Sudholz, A. Copley, K. Priestley
wiley   +1 more source

The Nitrogen Budget of Earth

open access: yes, 2015
We comprehensively compile and review N content in geologic materials to calculate a new N budget for Earth. Using analyses of rocks and minerals in conjunction with N-Ar geochemistry demonstrates that the Bulk Silicate Earth (BSE) contains \sim7\pm4 ...
Goldblatt, Colin, Johnson, Ben
core   +1 more source

The potential of phosphorus in clinopyroxene as a geospeedometer: examples from mantle xenoliths [PDF]

open access: yes, 2019
We investigate the potential to use concentrations and zoning patterns of phosphorus (P) in clinopyroxene as indicators of the rates of igneous and metasomatic processes, comparable to recent applications of P in olivine but applicable to more evolved ...
Asimow, P. D.   +6 more
core  

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