Results 21 to 30 of about 10,376 (220)

Abundance and Partitioning of OH in a High-pressure Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa [PDF]

, 2004
Concentrations of OH, and major and trace elements were determined in a suite of mantle-derived megacrysts that represent the crystallization products of a kimberlite-like magma at ~5 GPa and ~1400–1100°C.
Bell, David R., Moore, Rory O., Rossman, George R.   +2 more
core   +1 more source

Application of the Controlled Source Radiomagnetotellurics (CSRMT) in the Study of Rocks Overlying Kimberlite Pipes in Yakutia/Siberia

Geosciences, 2022
Тhe task of searching for kimberlite pipes in covered areas of the Yakutia kimberlite province is very difficult due to the significant heterogeneity of the rocks overlying kimberlite pipes.
Alexander K. Saraev, Arseny A. Shlykov, Buelent Tezkan   +2 more
doaj   +1 more source

Theoretical petrology [PDF]

, 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

Evidence for a reducing Archean ambient mantle and its effects on the carbon cycle [PDF]

, 2016
Chemical reduction-oxidation mechanisms within mantle rocks link to the terrestrial carbon cycle by influencing the depth at which magmas can form, their composition, and ultimately the chemistry of gases released into the atmosphere.
Aulbach, Sonja, Stagno, Vincenzo
core   +1 more source

Sr, Nd, and Pb isotope evidence for a mantle origin of alkali chlorides and carbonates in the Udachnaya kimberlite, Siberia [PDF]

, 2005
The kimberlite rocks of the Udachnaya-East pipe (Siberia) are uniquely fresh and contain very high abundances of primary volatiles (Cl, CO2, S). Alkali elements and chlorine are extremely abundant in the reconstructed kimberlite melt compositions, and ...
Kamenetsky, MB, Kamenetsky, VS, Maas, R, Sobolev, AV, Sobolev, NV   +4 more
core   +1 more source

Review of the spatial distribution of kimberlite pipes in the tectonic structures of the world

Geo&Bio
Kimberlite pipes are vertical or inclined cylindrical or cone-shaped bodies filled with kimberlite, an ultramafic igneous rock. The diameter of kimberlite pipes can vary from a few metres to 1.5 km, and their depth reaches several kilometres.
Andrii Luniachek
doaj   +1 more source

Preliminary investigation of the eruption time of kimberlite in the Late Devonian in Mengyin, Shandong

Frontiers in Earth Science, 2023
Kimberlite in the Mengyin area serves as an excellent medium for studying the characteristics and evolutionary processes of the Paleozoic mantle. In order to determine the age of the primary calcite within the kimberlite, in situ carbonate U–Pb dating ...
Ruicong Tian, Haiqin Wang, Jingxiang Tian, Wei Shan, Xiufeng Wang, Naijie Chi, Xiaodong Ma, Zhiyuan Chu, Shenghu Li, Qing Lv   +9 more
doaj   +1 more source

Interaction between protokimberlite melts and mantle lithosphere: evidence from mantle xenoliths from the Dalnyaya kimberlite pipe, Yakutia (Russia) [PDF]

, 2017
The Dalnyaya kimberlite pipe (Yakutia, Russia) contains mantle peridotite xenoliths (mostly lherzolites and harzburgites) that show both sheared porphyroclastic (deformed) and coarse granular textures, together with ilmenite and clinopyroxene megacrysts.
Afanasiev, Agashev, Agashev, Amshinsky, Arndt, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Bedard, Blundy, Boyd, Boyd, Brett, Brey, Burgess, Bussweiler, Bussweiler, Cas, DePaolo, Doucet, Evans, Finnerty, Fulmer, Genshaft, Gibson, Girnis, Giuliani, Goncharov, Green, Gregoire, Haggerty, Hart, Harte, Hauri, Howarth, Höfer, Imai, Ionov, Ionov, Ionov, Ishimaru, Karato, Kargin, Katayama, Kennedy, Klein-Ben David, Klemme, Kohler, Konzett, Kopylova, Kostrovitsky, Krogh, Kuzyura, Lavrent'ev, Lazarov, Logvinova, McCammon, McCammon, McDonough, McGregor, Mitchell, Moore, Moore, Nickel, Nickel, Nimis, O'Neill, O'Neill, Pearson, Peslier, Pokhilenko, Pokhilenko, Pokhilenko, Pokhilenko, Rodionov, Rodionov, Rodionov, Rudnick, Sazonova, Smelov, Sobolev, Sobolev, Sobolev, Sobolev, Sobolev, Sobolev, Solov'eva, Spetsius, Spetsius, Stagno, Stagno, Taylor, Tuff, Wells, Wu, Zack   +101 more
core   +2 more sources

Syn-eruptive agglutination of kimberlite volcanic ash

Volcanica, 2020
Pyroclastic deposits of the Holocene Igwisi Hills kimberlite volcanoes, Tanzania, preserve unequivocal evidence for rapid, syn-eruptive agglutination.
David Haddock, Shukrani Manya, Richard James Brown, Thomas Jones, Fabian Wadsworth, Kate Dobson, Thomas Gernon   +6 more
doaj   +1 more source

XENOLITH GARNETS FROM MIR KIMBERLITE PIPE: CHEMICAL COMPOSITION AND EVIDENCE OF METASOMATIC PROCESSES IN THE LITHOSPHERE MANTLE

Геодинамика и тектонофизика, 2022
This paper reports the results on the composition of lithosphere mantle under the Mirny kimberlite field. The authors investigated 57 samples of the mantle xenoliths collected from the Mir pipe.
T. V. Kalashnikova, S. I. Kostrovitsky, K. A. Sinitsyn, E. E. Yudintseva   +3 more
doaj   +1 more source