Results 81 to 90 of about 3,348 (162)

Widespread PREMA in the upper mantle indicated by low-degree basaltic melts. [PDF]

Nat Commun, 2023
Cai R, Liu J, Pearson DG, Giuliani A, van Keken PE, Oesch S.   +5 more
europepmc   +1 more source

Rift-induced disruption of cratonic keels drives kimberlite volcanism. [PDF]

Nature, 2023
Gernon TM, Jones SM, Brune S, Hincks TK, Palmer MR, Schumacher JC, Primiceri RM, Field M, Griffin WL, O'Reilly SY, Keir D, Spencer CJ, Merdith AS, Glerum A.   +13 more
europepmc   +1 more source

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

Geochemistry, Geophysics, Geosystems
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 ...
C. Adam, P. D. Kempton
doaj   +1 more source

Thermal State and Thickness of the Lithospheric Mantle Beneath the Northern East-European Platform: Evidence from Clinopyroxene Xenocrysts in Kimberlite Pipes from the Arkhangelsk Region (NW Russia) and Its Applications in Diamond Exploration

Geosciences
This paper presents the reconstruction of the architecture of the lithospheric mantle, including its thermal state and thickness, as well as the scale and efficiency of its sampling by four kimberlites from the Arkhangelsk diamondiferous province ...
Elena Agasheva, Alyona Gudimova, Elena Malygina, Alexey Agashev, Alexey Ragozin, Elena Murav’eva, Anna Dymshits   +6 more
doaj   +1 more source

Appendix C- Ilmenite and chromite from kimberlites

This dataset contains BSE images of ilmenite and chromite from Ekati, Gahcho Kué, AK6 (from Karowe), Orapa and Victor kimberlites from Chapters 3 and 5 in L.
Fairhurst, Lydia
core   +1 more source

A Machine Learning Approach to Single Garnet Geothermometry and Application to Tracing the Fingerprint of Superdeep Diamonds

Geochemistry, Geophysics, Geosystems
Estimating the equilibration temperatures of mantle‐derived garnets is crucial for assessing the diamond potential of kimberlites. Traditional garnet geothermometers require co‐existing mineral data or costly trace element analysis, limiting their ...
Qiwei Zhang, Matthew F. Hardman, Thomas Stachel, Ingrid Chinn, Michael Seller, Bruce Kjarsgaard, D. Graham Pearson   +6 more
doaj   +1 more source

A contribution to the petrology of kimberlites

, 1978
The petrogenetic relationships of the different varieties of kimberlite in the De Beers Mine and Letseng-Ia-terai composite diatremes have been investigated using petrographic and chemical methods.
Kruger, Floris Johan
core  

Indicator mineralogy of the KL-01 and KL-22 kimberlites, Lake Timiskaming kimberlite field, Ontario

, 2008
Kimberlite and till samples from the recently discovered KL-01 and KL-22 kimberlites in the Lake Timiskaming kimberlite field, northeastern Ontario, have been studied by the Geological Survey of Canada to determine their kimberlite indicator mineral ...
M B McClenaghan, B A Kjarsgaard, I M Kjarsgaard   +2 more
core   +1 more source

Age and Petrogenesis of Kimberlites and Related Rocks from Finland

, 2022
© 2022 Hayden Boyd DaltonKimberlites are rare, small volume ultramafic igneous rocks found on every continent on Earth, with eruption ages spanning almost 3 billion years.
Dalton, Hayden Boyd
core  

Diamonds from the Coromandel Area, West Minas Gerais State, Brazil: an update and new data on surface sources and origin

Brazilian Journal of Geology
Important diamond deposits southeast of Coromandel and the local geology have been studied in an attempt to understand what surface source provided the stones.
Joachim Karfunkel, Donald Hoover, Augusto Fonseca Fernandes, Geraldo Norberto Chaves Sgarbi, Klaus Kambrock, Gustavo Diniz Oliveira   +5 more
doaj   +1 more source