Results 51 to 60 of about 2,573 (214)

Secular Variation in the North American Kimberlite Formation: The Variable Connection to LLSVPs

open access: yesGeochemistry, 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

Plume genesis of non-kimberlite diamonds

open access: yesЛитосфера, 2015
Calculations shown that a relatively low-temperature kimberlite magmas consolidated with decompression exploded on significant depth and formed pipes.
V. S. Shkodzinskiy
doaj   +2 more sources

Material aspects of kimberlite rocks productivity

open access: yesМінеральні ресурси України, 2017
Most of investigated kimberlite diatremes of the Siberian platform represent multiphase pipes. Each magmatic phase of intrusion, formed inside diatremes, is composed by kimberlites with specific petrographic and petrochemical type possessing a number of ...
M. M. Zinchuk
doaj  

Theoretical petrology [PDF]

open access: yes, 1979
The central issues in petrology have remained remarkably unchanged in the last 50 years. In igneous petrology, the focus is on understanding the nature and cause of diversity in igneous rocks: on identifying primary magma types and constraints on the ...
Stolper, Edward
core   +1 more source

Correlative Tomography for Polymineralic Inclusion Composition in Sublithospheric Diamonds

open access: yesGeophysical 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

Deformation Controlled Fluid Mass‐Transfer Processes in Ancient Orogens

open access: yesGeophysical 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

A FIRST REPORT ON THE ROLE OF TRACE ELEMENT PEDOGEOCHEMISTRY IN DIAMOND EXPLORATION- AN EXAMPLE FROM LATTAVARAM KIMBERLITE CLUSTER, SOUTHERN INDIA

open access: yesGeochimica Brasiliensis, 2018
Trends in a concentration of selected trace elements in residual soils on four known diamondiferous kimberlite pipes (3, 4, 8 and 9) occurring at Lattavaram within the Wajrakarur Kimberlite Field (WKF) is attempted for the first time.
Rameshchandra Phani Pothuri
doaj   +1 more source

ABOUT LITHOMINERALOGICAL COMPOSITION OF ANCIENT SEDIMENTARY DIAMONDIFEROUS ROCKS

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2018
Litho-mineralogical and structural-formation generation features of Upper Devonian-Carboniferous crusts of weathering on terrigenous-carbonate rocks, kimberlites and deposits enriched by products of their redeposition, have been studied, that allowed ...
N. N. Zinchuk
doaj   +1 more source

The Kaapvaal craton seismic anisotropy: Petrophysical analyses of upper mantle kimberlite nodules

open access: yes, 2001
International audienceA dense network of seismic stations has been deployed on the Kaapvaal craton (South Africa) to investigate the upper mantle seismic structures. In order to bring independent petrophysical constraints, we analyze a direct sampling of
Barruol, Guilhem   +2 more
core   +3 more sources

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