Results 171 to 180 of about 3,752 (234)

The age of continental crust in the northern Prince Charles mountains (East Antarctica) as evidenced by zircon xenocrysts from cretaceous alkaline-ultramafic rocks

Lithos, 2020
Cretaceous alkaline-ultramafic stocks in the northern Prince Charles Mountains (PCM) contain zircon xenocrysts entrained during magma ascent to the surface.
E. Mikhalsky, A. Andronikov, G. Leitchenkov, B. Belyatsky   +3 more
exaly   +2 more sources

Unexposed Archean components and complex post-Archean accretion/reworking processes beneath the southern Yangtze Block revealed by zircon xenocrysts from the Paleozoic lamproites, South China

Precambrian Research, 2018
Integrated U–Pb dating and Hf-isotope analysis of zircon xenocrysts from the Baifen lamproites of the Zhenyuan area in the southeastern Guizhou Province offer a unique glimpse into the evolution of the deep continental crust beneath the southern part of ...
Jianping Zheng, William L Griffin
exaly   +2 more sources

Identifying xenocrystic tourmaline in Himalayan leucogranites

American Mineralogist, 2023
Abstract Tourmaline is a common autocrystic mineral in granitic and pegmatitic rocks that records valuable information on the physicochemical evolution of magmas. However, xenocrystic tourmaline that does not crystallize from host magmas is also common but seldom reported and notoriously difficult to identify.
Jinsheng Han, Huayong Chen, Haijun Xu, Olivier Nadeau, Chang Xu   +4 more
openaire   +1 more source

Cr-pyrope xenocrysts with oxide mineral inclusions from the Chompolo lamprophyres (Aldan shield): Insights into mantle processes beneath the southeastern Siberian craton

Mineralogical magazine, 2022
Pyrope xenocrysts (N = 52) with associated inclusions of Ti- and/or Cr-rich oxide minerals from the Aldanskaya dyke and Ogonek diatreme (Chompolo field, southeastern Siberian craton) have been investigated.
D. Rezvukhin, E. Nikolenko, I. Sharygin, O. V. Rezvukhina, M. Chervyakovskaya, A. Korsakov   +5 more
semanticscholar   +1 more source

Cooling rates of olivine xenocrysts in the EET79001 shergottite [PDF]

Antarctic meteorite research, 1998
P(論文)The chemical zoning profiles of olivine xenocrysts in lithology A of the Elephant Moraine (EET) 79001 basaltic shergottite have been measured in order to investigate its cooling history.
Kaiden,Hiroshi, Mikouchi,Takashi, Miyamoto,Masamichi   +2 more
openaire   +2 more sources

Cognate versus xenocrystic olivines in kimberlites – A review

Earth-Science Reviews, 2021
Abstract Models for a xenocryst origin for kimberlite olivines emphasise the similarity between their core compositions and those in mantle peridotites. While this permits a xenocryst origin, it does not provide proof, as magmas generated in equilibrium with mantle olivines could, in principle, crystallize initial olivines matching those in the ...
Andy Moore, Gelu Costin, Alexander Proyer   +2 more
openaire   +1 more source

Origins of Zircon Xenocrysts in the Neoproterozoic South Anhui Ophiolite, Yangtze Block

Minerals (Basel, Switzerland)
Zircon serves as a robust tracer for crustal recycling processes owing to its wide stability under diverse geological conditions. Its cryptic occurrence within ophiolites offers valuable insights into regional paleotectonic evolution.
Ziming Sun, Junyong Li, Xiaolei Wang
exaly   +2 more sources

Zircon xenocrysts in Tibetan ultrapotassic magmas: Imaging the deep crust through time

Geology, 2014
Dong Liu, Yaoling Niu, Timothy Harrison   +2 more
exaly   +2 more sources

3.85 Ga continental crust beneath the southern North China Craton: Evidence from zircon xenocrysts in Cretaceous granites

, 2020
A fragment of Hadean continental crust has been postulated to underlie the North China Craton based on the discovery of >3.8 Ga detrital zircons, but these detrital zircons may be transported from a lateral source. Here we report new U Pb ages of 3823 to
Nan Qi, Zhen-Ju Zhou, H. Zou, Yan-Jing Chen   +3 more
semanticscholar   +1 more source

Secular evolution of the lithospheric mantle beneath the northern margin of the North China Craton: Insights from zoned olivine xenocrysts in Early Cretaceous basalts

, 2020
Abundant zoned olivine xenocrysts from Early Cretaceous basalts of the Yixian Formation in western Liaoning Province, China, contain critical information about the nature and evolution of the lithospheric mantle of the northern North China Craton ...
Yao Xu, Hong-Fu Zhang
semanticscholar   +1 more source