Results 121 to 130 of about 366 (172)

Dense hydrated Mg-silicates in diamond: Implications for transport of H₂O into the mantle. [PDF]

Sci Adv
Carvalho LDV, Stachel T, Luth RW, Locock AJ, Pearson DG, Steele-MacInnis M, Stern RA, Nestola F, Scholz R, Jalowitzki T, Fuck RA.   +10 more
europepmc   +1 more source

Coevolution of craton margins and interiors during continental break-up. [PDF]

Nature
Gernon TM, Hincks TK, Brune S, Braun J, Jones SM, Keir D, Cunningham A, Glerum A.   +7 more
europepmc   +1 more source

Elemental redistribution in tropical soils: insights into REE, U, and Th mobility after extended phosphogypsum use. [PDF]

Environ Geochem Health
Tanure LPP, Vasques ICF, Veloso RW, Tanure MMC, Abrahão WAP, Bellato CR, Gasparon M, de Mello JWV.   +7 more
europepmc   +1 more source

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Indian kimberlites and the genesis of kimberlites

Chemical Geology, 1984
Abstract Late Proterozoic kimberlites occur in both southern and central India. They are similar in petrography and geochemistry to the kimberlites of southern Africa and Yakutia, U.S.S.R. These rocks contain low-CaO forsteritic olivines (Fo92), abundant phlogopites, magnesian ilmenites, aluminous—magnesian chromites, chrome-pyrope garnets surrounded
Eric A.K. Middlemost, Dalim K. Paul
openaire   +1 more source

Compositional classification of ?kimberlitic? and ?non-kimberlitic? ilmenite

Lithos, 2004
Abstract Ilmenite is one of the common kimberlitic indicator minerals recovered during diamond exploration, and its distinction from non-kimberlitic rock types is important. This is particularly true for regions where these minerals are present in relatively low abundance, and they are the dominant kimberlitic indicator mineral recovered.
Bruce A. Wyatt, Mike Baumgartner, Eva Anckar, Herman Grutter   +3 more
openaire   +2 more sources

Kimberlite and kimberlitic intrusives of southeastern Australia

Mineralogical Magazine, 1980
SummaryFifteen widely separated occurrences of kimberlite and kimberlitic rocks are now known in south-eastern Australia. Those that have been satisfactorily dated isotopically give ages ranging from Permian to Late Jurassic. One occurrence exhibits an intimate spatial association with carbonatite.
openaire   +1 more source

Kimberlitic zircons ? A possible aid in prospecting for kimberlites

Mineralium Deposita, 1975
Kimberlitic zircons from 16 intrusions in Lesotho, the Republic of South Africa, and Tanzania have been investigated. The following characteristics distinguish the kimberlitic zircons from the zircons derived from most other sources: 1. Rounded to subrounded grains predominate; euhedral zircons are very rare. 2.
P. Kresten, P. Fels, G. Berggren
openaire   +1 more source

What is a Kimberlite? Petrology and Mineralogy of Hypabyssal Kimberlites

Elements, 2019
Hypabyssal kimberlites are subvolcanic intrusive rocks crystallised from mantle-derived magmas poor in SiO2 and rich in CO2 and H2O. They are complex, hybrid rocks containing significant amounts of mantle-derived fragments, primarily olivine with rare diamonds, set in a matrix of essentially magmatic origin.
Mitchell, Roger H., Giuliani, Andrea; id_orcid0000-0002-6823-2807, O'Brien, Hugh   +2 more
openaire   +3 more sources

Model of a kimberlite pipe

Physics and Chemistry of the Earth, 1975
Abstract The model of a kimberlite pipe depicts a hypothetical pipe having a diameter of 300 m at a level equivalent to the post-erosional (present-day) surface of the major pipes in the Kimberley area. Below this reference level the pipe configuration and composition illustrate features typical of the Kimberley occurrences.
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Mineralogy of the P2-West ‘Kimberlite’, Wajrakarur kimberlite field, Andhra Pradesh, India: kimberlite or lamproite?

Mineralogical Magazine, 2013
AbstractA detailed mineralogical examination of representative material from the P2-West 'kimberlite' located in the Wajrakarur Kimberlite Field (India) demonstrates that significant differences exist between these rocks and archetypal hypabyssal kimberlite.
Gurmeet Kaur, R. H. Mitchell
openaire   +1 more source