Results 61 to 70 of about 924 (220)
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.Abstract Deep‐origin carbonatite melts are considered to be the products of partial‐melting of the oceanic crust in the subduction zones. In this study, we conducted electrical conductivity (EC) measurements on two samples, the composition of which resemble the partial‐melting products atop the 410‐km discontinuity and in the lower part of the ...
Bin Zhao +3 more
wiley +1 more source
Physical characteristics of kimberlite and basaltic intraplate volcanism and implications of a biased kimberlite record [PDF]
, 2013 We assess bias in the record of kimberlite volcanism by using newly acquired size data on more than 900 kimberlite bodies from 12 kimberlite fields eroded to depths of between 0 m and >1200 m, and by a comparison with intraplate monogenetic basaltic ...
Brown, RJ, Valentine, GA
core +2 more sources
Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1235-1253, November 2025.This study presents the gemological analysis of 25 garnets from Hellenistic and Roman jewellery in the Archaeological Museum of Thessaloniki using mobile Raman spectroscopy and micro‐EDXRF. The garnets are classified into three geochemical clusters, with notable differences in distribution between Thessaloniki and Pydna, suggesting distinct trading ...
Maria Nikopoulou +8 more
wiley +1 more source
Secular Variation in the North American Kimberlite Formation: The Variable Connection to LLSVPs
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.Abstract Kimberlites are rare and perplexing igneous rocks that may represent the deepest‐sourced melt type extracted from within the Earth's mantle, and their origin may be associated with Large Low Shear Velocity Provinces (LLSVPs) along the core‐mantle boundary.
C. Adam, P. D. Kempton
wiley +1 more source
Petrography, mineralogy, geochemistry and geochronology of the diamondiferous Drybones Bay kimberlite Pipe and Mud lake kimberlite dyke, Northwest Territories [PDF]
, 2016 The Drybones Bay and Mud Lake kimberlites are Ordovician kimberlites located in the Slave Geological Province. The Drybones Bay pipe formed by multiple discrete eruptions, producing several texturally distinct phases of kimberlite, including hypabyssal ...
Sheng, Ankar Rockwell
core
Correlative Tomography for Polymineralic Inclusion Composition in Sublithospheric Diamonds
Geophysical Research Letters, Volume 52, Issue 11, 16 June 2025.Abstract Sublithospheric diamonds and their inclusions are the deepest known samples from the Earth's mantle. Typically, the inclusions are trapped as minerals which are only stable in the deep mantle, retrogressing into multiple phases during their uplift. Determining the bulk inclusion composition is difficult but crucially important.
B. D. Rayner +6 more
wiley +1 more source
Геодинамика и тектонофизика, 2021 The article deals with the fundamental concepts of a new method of interpretation of regional gravimetry (scale 1:1000000) based on the idea of the deformational nature of low-frequency gravity anomalies.
S. M. Makeev
doaj +1 more source
Deformation Controlled Fluid Mass‐Transfer Processes in Ancient Orogens
Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.Abstract Despite abundant empirical evidence, the details of coupled deformation and mass transfer processes within a framework of the crustal architecture of ancient orogens remains enigmatic. Geophysical imaging of the Larder Lake‐Cadillac deformation zone, a well‐endowed crustal‐scale fault system in the Superior Province of the Canadian Shield ...
G. J. Hill +11 more
wiley +1 more source
Primary Composition of Kimberlite Melt [PDF]
, 2023 The compositions (mineralogy, major- and trace-element chemistry of rocks and minerals, and Sr-Nd-Hf isotope systematics) of two kimberlite bodies, the Obnazhennaya pipe and the Velikan dyke from the Kuoika field, Yakutian kimberlite province (YaKP ...
Jing Sun +6 more
core +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 3, March 2025.Abstract Major and trace elements, including H2O, were determined in garnet and clinopyroxene to constrain the evolution of mantle xenoliths from Diavik, Canada. The 20 samples, derived from 120 to 220 (240) km depth, define a geotherm equivalent to 37 mW/m2 surface heat flow and include three eclogite (A, B, C) and two pyroxenite (B, C) types (A: High
Esther Schmädicke +2 more
wiley +1 more source