Results 31 to 40 of about 2,911 (204)
Noble gases in diamonds: Occurrences of solarlike helium and neon [PDF]
, 1987 We have measured noble gases in 17 diamond samples, mostly inclusion free, from diverse, known locations. The ^3He/^4He ratios are characterized by a large spread (10^4), ranging from values below atmospheric to close to the solar ratio.
Epstein, S. +3 more
core +1 more source
THE FEATURES OF THE INDICATOR MINERALS OF KIMBERLITES IN A NEW PIPE YANVARSKAJA (WESTERN YAKUTIA)
Известия высших учебных заведений: Геология и разведка, 2017 The first results of the mineral-petrographic studies of microclastes of kimberlites from the basal horizon of the Upper Paleozoic deposits of the Alakit-Markhinsky kimberlite field (Western Yakutia) have been presented.
D. V. Ivanov +2 more
doaj +1 more source
Olivine in the Udachnaya-East kimberlite (Yakutia, Russia): types, compositions and origins [PDF]
, 2007 Olivine is the principal mineral of kimberlite magmas, and is the main contributor to the ultramafic composition of kimberlite rocks. Olivine is partly or completely altered in common kimberlites, and thus unavailable for studies of origin and evolution ...
Demouchy, S +7 more
core +3 more sources
Kimberlites of the Manchary pipe: a new kimberlite field in Central Yakutia
Russian Geology and Geophysics, 2010 Abstract This paper reports new petrographic and mineralogical data on the Manchary kimberlite pipe, which was discovered south of Yakutsk (Central Yakutia) in 2007–2008, 100 km. The pipe breaks through the Upper Cambrian carbonate deposits and is overlain by Jurassic terrigenous rock masses about 100 m thick.
A.P. Smelov +11 more
openaire +2 more sources
XENOLITHS OF POLYMICTIC BRECCIAS FROM KIMBERLITES OF THE YAKUTIAN DIAMONDIFEROUS PROVINCE
Геодинамика и тектонофизика, 2022 The polymictic breccias, extremely rare mantle conglomerates being the fragments of rocks and large mantle minerals cemented with fine-grained mass have been long provoking interest of petrologists worldwide.
L. N. Pokhilenko +2 more
doaj +1 more source
CO 2 Solubility in Kimberlite melts CO 2 Solubility in Kimberlite melts [PDF]
, 2015 International audienceCarbon dioxide is the most abundant volatile in kimberlite melts and its solubility exerts a prime influence on the melt structure, buoyancy, transport rate and hence eruption dynamics.
Gaillard, Fabrice +4 more
core +4 more sources
Геодинамика и тектонофизика, 2022 Petrophysical, tectonophysical and paleomagnetic studies were done on the field of diamonds from the Komsomolskaya kimberlite pipe to interpret the observed gravimagnetic field. As a result of studying the structural-material complexes (SMC) of the field,
K. M. Konstantinov, A. S. Gladkov
doaj +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 +4 more
core +1 more source
Applied SciencesPhlogopite is a crucial indicator for effectively constraining the magmatic evolution and emplacement mechanism of kimberlite. In this study, samples were collected from the No. 110 kimberlite pipe within diamond belt I and the No.
Sishun Ma, Ende Wang, Haitao Fu
doaj +1 more source
Геодинамика и тектонофизика, 2017 Modeling of physical and geological properties of a study object is an integral part of geological surveys at each stage. Without a model of physical and geological properties (PhGM) it is impossible to obtain a complete set of reflection indicators of ...
K. M. Konstantinov +5 more
doaj +1 more source