Results 191 to 200 of about 14,415 (244)

Genesis and evolution of kimberlites

Nature Reviews Earth & Environment, 2023
A. Giuliani, Max W Schmidt, T. Torsvik, Yana Fedortchouk   +3 more
semanticscholar   +1 more source

Kimberlite Volcanism

Annual Review of Earth and Planetary Sciences, 2013
Kimberlite magmas are volatile-rich, silica-poor ultrabasic magmas originating as small-degree mantle melts at depths of 150 km or greater. Alteration and entrained xenoliths obscure their original magma chemistry and properties. Kimberlite magmas decrease temperature by a few hundred degrees during ascent.
openaire   +2 more sources

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

Polymineralic inclusions in kimberlite-hosted megacrysts: Implications for kimberlite melt evolution

Lithos, 2019
Abstract Megacrysts are large (cm to >20 cm in size) mantle-derived crystals, which are commonly entrained by kimberlite magmas, comprising of olivine, orthopyroxene, clinopyroxene, phlogopite, garnet, ilmenite and zircon as common phases. Numerous studies have shown megacrysts to contain polymineralic inclusions, which have been interpreted to ...
Adam Abersteiner, Vadim S. Kamenetsky, Karsten Goemann, Alexander V. Golovin, Igor S. Sharygin, D. Graham Pearson, Maya Kamenetsky, Marina A. Gornova   +7 more
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

The assimilation of felsic xenoliths in kimberlites: insights into temperature and volatiles during kimberlite emplacement

Contributions to Mineralogy and Petrology, 2021
Sofya Niyazova, M. Kopylova, B. Dyck, A. Benisek, E. Dachs, A. De Stefano   +5 more
semanticscholar   +1 more source

Kimberlite Magmatism and Textural Genetic Classifications of Kimberlite

1986
Initial studies of kimberlites (Wagner 1914) demonstrated that they occur as carrot-shaped vertical intrusions termed pipes or diatremes and as tabular dikes (fissure kimberlites).
openaire   +1 more source

Apatite compositions and groundmass mineralogy record divergent melt/fluid evolution trajectories in coherent kimberlites caused by differing emplacement mechanisms

Contributions to Mineralogy and Petrology, 2020
A. Soltys, A. Giuliani, D. Phillips
semanticscholar   +1 more source

Gravity Anomalies and Kimberlite Exploration in the Wajrakarur Kimberlite Field of South Indian Kimberlite Province

Geological Journal
ABSTRACT The Wajrakarur Kimberlite Field (WKF) in Anantapur, Andhra Pradesh, India, stands as a pivotal region for kimberlite exploration in the South Indian Kimberlite Province. It features distinct gravity highs and lows, sandwiched between Closepet Granite (CG) and Cuddapah Basin (CB), with notable gold‐mineralized Ramagiri ...
Raghu Vansh Bhushan Singh, Siriboyina Bangaru Babu, Birendra Pratap   +2 more
openaire   +1 more source

The Hf isotope composition of cratonic mantle: LAM-MC-ICPMS analysis of zircon megacrysts in kimberlites

, 2000
W. Griffin, N. Pearson, E. Belousova, S. Jackson, E. V. Achterbergh, S. O’Reilly, S. Shee   +6 more
semanticscholar   +1 more source