Results 241 to 250 of about 24,088 (309)

Xenolith-controlled geotherm for the central Fennoscandian Shield: implications for lithosphere–asthenosphere relations

Tectonophysics, 1999
I. Kukkonen, P. Peltonen
exaly   +2 more sources

Dissolution of mantle orthopyroxene in kimberlitic melts: Petrographic, geochemical and melt inclusion constraints from an orthopyroxenite xenolith from the Udachnaya-East kimberlite (Siberian Craton, Russia)

, 2021
A. Abersteiner, Vadim Kamenetsky, A. Golovin, K. Goemann, K. Ehrig   +4 more
semanticscholar   +1 more source

Fluid inclusions in mantle xenoliths

Lithos, 2001
Abstract Fluid inclusions in olivine and pyroxene in mantle-derived ultramafic xenoliths in volcanic rocks contain abundant CO2-rich fluid inclusions, as well as inclusions of silicate glass, solidified metal sulphide melt and carbonates. Such inclusions represent accidentally trapped samples of fluid- and melt phases present in the upper mantle, and
Tom Andersen, Else-Ragnhild Neumann
openaire   +1 more source

Noble gases in an Hawaiian xenolith

Nature, 1975
THE noble gas record in meteorites and lunar samples has been the subject of many investigations aimed at determining their age, the history of their exposure to cosmic rays and to the solar wind, and the early chronology of events in the Solar System (see review in ref. 1).
E. W. HENNECKE, O. K. MANUEL
openaire   +1 more source

Lithospheric structure and evolution of the North China Craton: An integrated study of geophysical and xenolith data

Science China. Earth Sciences, 2020
Jianping Zheng, B. Xia, H. Dai, Qiang Ma
semanticscholar   +1 more source

XENOLITHS AT THRELKELD, CUMBERLAND

Proceedings of the Yorkshire Geological Society, 1940
In the years 1925–6 I did a good deal of field-work on the so-called microgranite of Threlkeld and St. John’s Vale, with the intention of making a complete petrographic investigation of these rock masses. Material was collected and a number of microscope slices were cut.
openaire   +1 more source

Southern African Kimberlites and their Xenoliths

1991
South African diamonds were found in primary kimberlite source rock in the late 1860’s and early 1870’s when Jagersfontein, Bultfontein, DeBeers, Dutoitspan, and other pipes near Kimberley (Fig. 1) were discovered in rapid succession (Wilson 1982; Janse 1984). Prior to this, stream gravels were the only diamond source worldwide.
J. J. Gurney, R. O. Moore, M. L. Otter, M. B. Kirkley, J. J. Hops, T. E. McCandless   +5 more
openaire   +1 more source

Farmington Meteorite: Cristobalite Xenoliths and Blackening

Science, 1967
The Farmington chondrite contains two small xenoliths of granular cristobalite, each surrounded by a thin reaction rim of diopsidic clinopyroxene. Similarities between the blackened structure and drusy cavities, characteristic of this meteorite, and those of an experimentally heat-treated chondrite suggest that Farmington was reheated rather than ...
openaire   +2 more sources

Kimberlites and their xenoliths

Earth-Science Reviews, 1982
  +4 more sources

A Xenolithic Pegmatite in the Dalbeattie “Granite”

Geological Magazine, 1936
SUMMARY AND CONCLUSIONA pegmatite cutting granodiorite contains abundant xenoliths which are in various stages of assimilation. Assimilation involved the conversion by the process of “reciprocal reaction” of the minerals of the xenoliths into species which were in equilibrium under the prevailing magmatic conditions, and the subsequent “mechanical ...
openaire   +1 more source