Results 31 to 40 of about 924 (220)

Diamonds in old sedimentary rocks and their source (on the basis of Yakutia kimberlite province)

open access: yesРуды и металлы, 2022
This study provides the results of a complex investigation of a number of kimberlite bodies with half-industrial diamond content in several regions of the Siberian platform. This allowed us to establish the typomorphic features of the mineral.
Leonid D. Barduchinov   +1 more
doaj   +1 more source

Ecological Risk Assessment of PTEs in Topsoils Impacted by Diamond Mining (Yakutia, Russia) [PDF]

open access: yesE3S Web of Conferences, 2023
The concentrations of potentially toxic elements (PTEs) in the topsoils of Udachny mining area were determined. The soil samples were taken from the 42 topsoil samples at a depth of 0-20 cm.
Gololobova Anna
doaj   +1 more source

Kimberlite wall-rock fragmentation processes: Venetia K08 pipe development [PDF]

open access: yes, 2011
Current kimberlite pipe development models strongly advocate a downward growth process with the pipe cutting down onto its feeder dyke by means of volcanic explosions.
S. Kurszlaukis   +7 more
core   +1 more source

Reconstruction of a multi-vent kimberlite eruption from deposit and host rock characteristics: Jericho kimberlite, Nunavut, Canada [PDF]

open access: yes, 2011
The Jericho kimberlite (173.1. ±. 1.3. Ma) is a small (~. 130. ×. 70. m), multi-vent system that preserves products from deep (>. 1. km?) portions of kimberlite vents.
Cas, R.A.F.   +3 more
core   +1 more source

Rare Hydrated Magnesium Carbonate Minerals Nesquehonite and Dypingite of the Obnazhennaya Kimberlite Pipe, in the Yakutian Kimberlite Province [PDF]

open access: yes, 2023
The result of a complex mineralogical study of the first discovery of the rare hydrated magnesium carbonate minerals of Nesquehonite and Dypingite in the Obnazhennaya kimberlite pipe (of the Yakutian kimberlite province) is presented.
Nadezhda V. Zayakina   +2 more
core   +1 more source

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

open access: yes, 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

An ion microprobe U-Th-Pb study of zircon xenocrysts from the Lahtojoki kimberlite pipe, eastern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2001
Eleven relatively large (diameter 1–2 mm) zircon grains extracted from the Lahtojoki kimberlite pipe (Eastern Finland Kimberlite Province) have been analysed by the ion microprobe NORDSIM for their U- and Pb- isotopic composition.
P. Peltonen, I. Mänttäri
doaj   +1 more source

Petrogenesis of macrocrystic and aphanitic intrusions in Mesoproterozoic diamondiferous pipe 2 kimberlite, Wajrakarur kimberlite field, eastern Dharwar craton, southern India [PDF]

open access: yes, 2014
Mesoproterozoic Pipe 2 kimberlite intruding granitic gneisses in the Wajrakarur Kimberlite Field (WKF) of Eastern Dharwar craton, southern India, is one of the first discovered pipes from this field.
Malandkar, M.   +2 more
core   +1 more source

Kimberlite Volcanism [PDF]

open access: yes, 2013
Kimberlite magmas are volatile-rich, silica-poor ultrabasic magmas originating as small-degree mantle melts at depths of 150 km or greater. Alteration and entrained xenoliths obscure their original magma chemistry and properties.
Sparks, R. S. J.
core   +1 more source

Geochemistry and petrology of two kimberlites at Krishtipadu from Gooty cluster, Andhra Pradesh, southern India - evidence of kimberlite magmatism and a possible carbonatite association within Palaeoproterozoic lower Cuddapah basin

open access: yesRussian Journal of Earth Sciences, 2020
This paper addresses geochemical and petrological aspects of two outcropping kimberlites (5023 and 5119) of the Gooty cluster, emplaced in carbonate sediments of Vempalli Formation of lower Cuddapah basin at Krishtipadu, Anantapur district, Andhra ...
Phani P Ramesh Chandra   +2 more
doaj   +1 more source

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