Results 51 to 60 of about 657 (209)

Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada

, 2008
The paper presents data on petrology, bulk rock and mineral compositions, and textural classification of the Middle Jurassic Jericho kimberlite (Slave craton, Canada). The kimberlite was emplaced as three steep-sided pipes in granite that was overlain by
Hayman, Patrick, Kopylova, Maya G.
core   +1 more source

Geochemical criteria for identifying diamond-bearing areas [PDF]

E3S Web of Conferences
The paper demonstrates that diamondiferous objects may be pinpointed even by the middle-scale geochemical surveys. Relevant criteria were developed to identify and classify such objects by their prospectivity.
Krinochkin Lev, Kilipko Victor, Trofimov Alexander, Krinochkina Olga, Mamina Dinya   +4 more
doaj   +1 more source

Criteries and prospects of diamonds of the Vitebsk granulite massif

Журнал Белорусского государственного университета: География, геология, 2021
The article describes the history of studying the diamond content of tectonic structures of the territory of Belarus. Based on the results of magnetometric, mineralogical, tectonic studies carried out by industrial geologists and scientists over the past
Victor S. Konishchev, Andrei M. Kovkhuto   +1 more
doaj   +1 more source

Electrical Conductivity of Carbonatite Melts to 20 GPa: Constraints on Partial Melting Atop the 410‐km Discontinuity and in the Lower Mantle Transition Zone

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, Jintao Zhu, Qi Chen, Takashi Yoshino   +3 more
wiley   +1 more source

Some major problems with existing models and terminology associated with kimberlite pipes from a volcanological perspective, and some suggestions

, 2008
Five significant problems hinder advances in understanding of the volcanology of kimberlites: \ud \ud (1) kimberlite geology is very model driven; \ud \ud (2) a highly genetic terminology drives deposit or facies interpretation; \ud \ud (3) the effects ...
Cas, R.A.F., Pittari, A., Porritt, L., Cas, R. A. F., Hayman, P.   +4 more
core   +1 more source

Study of Garnets in Hellenistic–Roman Jewellery From the Collections of the Archaeological Museum of Thessaloniki, Greece

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, Stefanos Karampelas, Evangelia Tsangaraki, Lambrini Papadopoulou, Christos Katsifas, Ioannis Nazlis, Annareta Touloumtzidou, Vasilios Melfos, Nikolaos Kantiranis   +8 more
wiley   +1 more source

Physical characteristics of kimberlite and basaltic intraplate volcanism and implications of a biased kimberlite record

, 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   +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

Petrogenetic processes in the ultramafic, alkaline and carbonatitic magmatism in the Kola Alkaline Province: a review

, 2005
Igneous rocks of the Devonian Kola Alkaline Carbonatite Province (KACP) in NW Russia and eastern Finland can be classified into four groups: (a) primitive mantle-derived silica-undersaturated silicate magmas; (b) evolved alkaline and nepheline syenites; (
Balaganskaya, Elena, Demaiffe, Daniel, Beard, Andrew D., Demaiffe, D., Beard, Andrew, Downes, Hilary, Balaganskaya, E., Beard, Andy, Liferovich, R., Liferovich, Ruslan   +9 more
core   +1 more source

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, S. C. Kohn, R. J. Garwood, A. D. Burnham, G. P. Bulanova, C. B. Smith, A. R. Thomson   +6 more
wiley   +1 more source