Results 31 to 40 of about 3,752 (234)

Kishonite, VH2, and Oreillyite, Cr2N, Two New Minerals from the Corundum Xenocrysts of Mt Carmel, Northern Israel

Minerals, 2020
Here, we describe two new minerals, kishonite (VH2) and oreillyite (Cr2N), found in xenoliths occurring in pyroclastic ejecta of small Cretaceous basaltic volcanoes exposed on Mount Carmel, Northern Israel.
L. Bindi, F. Cámara, Sarah Gain, W. Griffin, Jin-Xiang Huang, M. Saunders, V. Toledo   +6 more
semanticscholar   +1 more source

Data for "Desilicification Rims of Zircon Xenocrysts Record the Timing of Kimberlite Emplacement" by Melnik A.E. et al.

, 2022
This file contains Supplementary Tables S1-S6 for the publication "Desilicification Rims of Zircon Xenocrysts Record the Timing of Kimberlite Emplacement" (submitted to Journal of Geophysical Research: Solid Earth in March 2022).
Melnik, A
core   +2 more sources

Kimberlite genesis and mantle metasomatism: insights from in situ U-Pb dating of single garnet xenocrysts

, 2023
Garnet xenocrysts from kimberlites provide unique insights into the composition, structure and evolution of the subcontinental lithospheric mantle (SCLM).
Marschall, Horst, Agashev, Alexey M., Gerdes, Axel, Agasheva, Elena V., Beranoaguirre, Aratz, Millonig, Leo J., Albert, Richard   +6 more
core   +1 more source

An ion microprobe U-Th-Pb study of zircon xenocrysts from the Lahtojoki kimberlite pipe, eastern Finland [PDF]

Bulletin of the Geological Society of Finland, 2001
Eleven relatively large (diameter 1–2 mm) zircon grains extracted from the Lahtojoki kimberlite pipe (Eastern Finland Kimberlite Province) have been analysed by the ion microprobe NORDSIM for their U- and Pb- isotopic composition.
P. Peltonen, I. Mänttäri
doaj   +1 more source

Griffinite, Al₂TiO₅: A New Oxide Mineral from Inclusions in Corundum Xenocrysts from the Mount Carmel Area, Israel

Crystals, 2023
Griffinite (IMA 2021-110), ideally Al2TiO5, is a new mineral from inclusions in corundum xenocrysts from the Mount Carmel area, Israel. It occurs as subhedral crystals, ~1–4 μm in size, together with Zr-rich rutile within a corundum grain. In this study,
Chi Ma, Fernando Cámara, Vered Toledo, Luca Bindi   +3 more
doaj   +1 more source

Genesis of chromite deposits by dynamic upgrading of Fe ± Ti oxide xenocrysts

Geology, 2019
*E-mail: mlesher@laurentian.ca 1 GSA Data Repository item 2019075, Table DR1 (classification of Type I stratiform magmatic chromite deposits) and Table DR2 (key characteristics of Type IB conduit-hosted chromite deposits), is available online at http ...
C. Lesher, H. Carson, M. Houlé
semanticscholar   +1 more source

The nature of the sub-continental lithospheric mantle beneath Thailand: evidence from xenocrysts in Cenozoic basalts

, 2022
Shortly after the cessation of the Cenozoic seafloor spreading in the South China Sea, a period of basaltic magmatism occurred in the Indochina Peninsula.
Quanshu Yan (5240159), Long Yuan (2617487)   +1 more
core   +1 more source

Retention of inherited Ar by alkali fedspar xenocrysts in a magma: Kinetic constraints from Ba zoning profiles [PDF]

, 2012
40Ar/39Ar dating of volcanic alkali feldspars provides critical age constraints on many geological phenomena. A key assumption is that alkali feldspar phenocrysts in magmas contain no initial radiogenic 40Ar (40Ar*), and begin to accumulate 40Ar* only ...
Morgan, Leah E., Mulcahy, S.R., Cassata, William S., Hlusko, Leslea, Hlusko, L.J., Cassata, W.S., Morgan, L.E., Mulcahy, Sean R., Kelley, Simon P., Renne, P.R., Njau, J.K., Njau, Jackson, Kelley, S.P., Renne, Paul R.   +13 more
core   +1 more source

Kimberlite pre-conditioning of the lithospheric mantle and implications for diamond survival: a case study of olivine and mantle xenocrysts from the Koidu mine (Sierra Leone)

Mineralium Deposita
The diamond potential of kimberlites is generally determined using indicator minerals (i.e., xenocrysts), entrained by the parent magma while ascending through the sub-continental lithospheric mantle (SCLM).
Geoffrey H. Howarth, Andrea Giuliani, Y. Bussweiler, Merrily M. Tau, S. Hashibi, Philip E. Janney, Tom Nowicki   +6 more
semanticscholar   +1 more source

Composition and origin of xenocrysts in the Eastern Shore spessartite dykes, Nova Scotia

, 2023
The Eastern Shore dykes are a swarm of mantle-derived spessartite (lamprophye) dykes in the Sheet Harbour area of eastern Nova Scotia. Two of the dykes, Pleasant Harbour-Borgles Island and Popes Harbour, contain abundant xenoliths and xenocrysts. Some of
Gan, Yuzhe
core