Results 1 to 10 of about 147 (81)

Petrology, Age, and Rift Origin of Ultramafic Lamprophyres (Aillikites) at Mount Webb, a New Alkaline Province in Central Australia [PDF]

Geochemistry, Geophysics, Geosystems, 2023
Diamond exploration over the past decade has led to the discovery of a new province of kimberlitic pipes (the Webb Province) in the Gibson Desert of central Australia.
Corinne Frigo, Marcus Haynes, Alexei Gorbatov   +2 more
exaly   +10 more sources

GEOCHEMICAL FEATURES OF DIKE AILLIKITES AND ALKALINE ROCKS OF THE BOLSHETAGNINSKY MASSIF (URIK-IYA GRABEN, EAST SAYAN REGION) [PDF]

Геодинамика и тектонофизика, 2022
The ICP-MS determinations have been made on microelement content of ~650–640 Ma ultramafic lamprophyre-aillikite dikes and alkaline silicate rocks and carbonatites from the Bolshetagninsky ijolite-syenite massif, spatially overlapped in the northern Urik-
V. B. Savelieva, E. P. Bazarova, Yu. V. Danilova, B. S. Danilov   +3 more
doaj   +5 more sources

SEQUENCE OF AILLIKITE AND CALCITE CARBONATITE FORMATION WITHIN THE BELAYA ZIMA MASSIF, EAST SIBERIA, RUSSIA [PDF]

Геодинамика и тектонофизика, 2022
The mineralogical and geochemical features, as well as the sequence of formation of aillikite and calcite carbonatite (CC) with pyrochlore are described for the massif of alkaline ultramafic carbonatite complexes Belaya Zima located in East Siberia ...
S. M. Zhmodik, I. V. Ashchepkov, D. K. Belyanin, E. V. Ayriyants, O. N. Kiseleva, V. A. Ponomarchuk   +5 more
doaj   +5 more sources

MELT INCLUSIONS IN OLIVINE AS A SOURCE OF INFORMATION ON THE COMPOSITION AND EVOLUTION OF DEEP MELTS OF AILLIKITES (ULTRAMAFIC LAMPROPHYRES) OF THE ILBOKICHI UPLIFT, THE SW SIBERIAN PLATFORM [PDF]

Геодинамика и тектонофизика, 2022
Aillikites are kimberlite-like rocks, important for understanding the composition and processes occurring in the mantle. Melt inclusions represent a reliable source of information.
A. Е. Starikova, I. R. Prokopyev, A. G. Doroshkevich, A. V. Kargin, A. A. Nosova, S. A. Kovalev   +5 more
doaj   +5 more sources

GEOCHRONOLOGY OF THE CHADOBETS ALKALINE ULTRAMAFIC CARBONATITE COMPLEX (SIBERIAN CRATON): NEW U-Pb AND Ar-Ar DATA [PDF]

Геодинамика и тектонофизика, 2021
The Chadobets alkaline ultramafic carbonatite complex is located on the Siberian craton within the southern boundary of the Permian-Triassic plume activity.
I. R. Prokopyev, A. G. Doroshkevich, A. V. Malyutina, A. E. Starikova, A. V. Ponomarchuk, D. V. Semenova, S. A. Kovalev, I. A. Savinsky   +7 more
doaj   +3 more sources

MICA COMPOSITION REFLECTING CONDITIONS OF AILLIKITE FORMATION IN ZIMA COMPLEX OF EASTERN SIBERIA

Геодинамика и тектонофизика
Four types of mica were identified in the macrocryst and fine porphyry aillikites from the Yarma zone of the Urik-Ija graben considering specific features of morphology, chemical composition, zonation and crystallization conditions.
V. B. Savelyeva, Yu. V. Danilova, E. P. Bazarova, B. S. Danilov, E. A. Khromova   +4 more
doaj   +2 more sources

Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia

Geochemistry, Geophysics, Geosystems, Volume 24, Issue 9, September 2023., 2023
Abstract The lithology, geochemistry, and architecture of the continental lithospheric mantle (CLM) underlying the Kimberley Craton of north‐western Australia has been constrained using pressure‐temperature estimates and mineral compositions for >5,000 newly analyzed and published garnet and chrome (Cr) diopside mantle xenocrysts from 25 kimberlites ...
Z. J. Sudholz, A. L. Jaques, G. M. Yaxley, W. R. Taylor, K. Czarnota, M. W. Haynes, L. Frewer, R. R. Ramsay, P. J. Downes, S. A. Cooper   +9 more
wiley   +1 more source

Geodynamic and Isotopic Constraints on the Genesis of Kimberlites, Lamproites and Related Magmas From the Finnish Segment of the Karelian Craton

Geochemistry, Geophysics, Geosystems, Volume 23, Issue 8, August 2022., 2022
Abstract Despite the scientific and economic significance of kimberlites and related magmas, their origin is unclear. Here, we address this issue using whole‐rock and perovskite‐derived Sr‐Nd‐Hf isotopes for the three occurrences of kimberlite, lamproites and ultramafic lamprophyres (UMLs) in Finland.
Hayden Dalton, Andrea Giuliani, Janet Hergt, David Phillips, Hugh O’Brien, Maxim D. Ballmer, Roland Maas, Jon Woodhead   +7 more
wiley   +1 more source

Evolution of lithospheric mantle beneath Bulkur diamond orangeitic tuff deposits NE Siberian Craton: Insights from geochemistry and thermobarometry of xenocrysts

Geosystems and Geoenvironment
The xenocrysts of studied Bulkur tuff site 1 with highest diamond grade are comparing with xenocrysts from new site 2 of phreatomagmatic Carnian (Lower Triassic) tuffs in Tuora Sis ridge.
I.V. Ashchepkov, A.P. Smelov, S.A. Grakhanov, A.S. Ivanov, A.M. Logvinova, O.B. Oleinikov, A.Ya. Biller   +6 more
doaj   +1 more source

A few thoughts on the diamondiferous nature of lamprophyres from Wajrakarur Kimberlite Field, Southern India

Mineralogia
Lamprophyre Clan Rocks (LCRs) such as lamprophyres, lamproites and kimberlites are reported from many parts of the cratonic areas in India, especially the diamondiferous Eastern Dharwar Craton (EDC).
Phani P. Ramesh Chandra, Kamvisis Ioannis   +1 more
doaj   +1 more source