Results 31 to 40 of about 5,988 (208)

Conducting lithospheric heterogeneities as a criterion of predictive assessment for promising diamond areas (on the example of Siberian kimberlite province)

Записки Горного института, 2017
Results of magnetotelluric tests, carried out in Siberian kimberlite province, are examined from the viewpoint of structural control over location of kimberlite fields and bunches of kimberlite pipes.
E. V. Pospeeva
doaj   +1 more source

Origins of olivine in Earth’s youngest kimberlite: Igwisi Hills volcanoes, Tanzania craton [PDF]

, 2021
Monomineralic millimeter-sized olivine nodules are common in kimberlites worldwide. It is generally thought that such ‘dunitic nodules’ originate from the base of the cratonic lithosphere and that their formation marks the onset of deep-rooted kimberlite
Tappe, Sebastian, Brown, Richard J., Bussweiler, Yannick, Vollmer, Christian, Shaikh, Azhar M., EIMF   +5 more
core   +1 more source

Combustion and Pyrolysis EA-IRMS Techniques to Determine the δ²H of Diamonds. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Diamonds are generally considered to be metasomatic minerals originating from the Earth's mantle. They formed through the interaction of carbon‐bearing fluids or melts with the surrounding deep lithology. Most knowledge about the formation of diamonds comes from studying their mineral inclusions or stable isotopes.
Fourel F, Lécuyer C, Thomassot E, Deloule E, Ojeimi C.   +4 more
europepmc   +2 more sources

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

Primary Composition of Kimberlite Melt

, 2023
The compositions (mineralogy, major- and trace-element chemistry of rocks and minerals, and Sr-Nd-Hf isotope systematics) of two kimberlite bodies, the Obnazhennaya pipe and the Velikan dyke from the Kuoika field, Yakutian kimberlite province (YaKP ...
Jing Sun, Dmitry Yakovlev, Sergey Kostrovitsky, Olga Belozerova, Tatiana Kalashnikova, Igor Ashchepkov, Anna Dymshits   +6 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

TRACE ELEMENT PARTITIONING BETWEEN APATITE AND KIMBERLITE-LIKE MELTS – IMPLICATIONS FOR VOLATILE DEGASSING AND FORMATION OF DIFFERENT KIMBERLITE FACIES

, 2021
Kimberlites are the deepest mantle magmas to reach the surface of the Earth and the hosts of the major primary diamond deposits. The enigmatic nature of kimberlites owing to poorly constrained triggers of kimberlite magmatism, melt composition, and ...
Chow, Richard
core  

Komatiites, kimberlites, and boninites [PDF]

Journal of Geophysical Research: Solid Earth, 2003
When the mantle melts, it produces ultramafic magma if the site of melting is unusually deep, the degree of melting is unusually high, or the source is refractory. For such melting to happen, the source must be unusually hot or very rich in volatiles. Differing conditions produce a spectrum of ultramafic magma types.
openaire   +3 more sources

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

, 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., Hayman, P.C., P.C. Hayman, R.A.F. Cas   +3 more
core   +1 more source