Zobrazeno 1 - 10
of 15
pro vyhledávání: '"G. R. Tilton"'
Publikováno v:
Journal of Petrology. 39:1865-1874
Virtually all known carbonatites have been intruded within plates by anorogenic processes, usually in rift zones, and can provide information on the chemical characteristics of the under-lying mantle(e.g. Bell et aL, 19821. The carbonatites of Pakist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eca21243b7246143847859b5c821ebc7
https://doi.org/10.1093/petroj/39.11-12.1865
https://doi.org/10.1093/petroj/39.11-12.1865
Publikováno v:
Contributions to Mineralogy and Petrology. 108:22-33
Pb, Nd and Sr isotope data are reported from two localities on mineral separates from Mg-rich metapelites and associated rocks that have been subducted to depths of at least 100 km, for which metamorphic conditions are estimated at 28–33 kilobars p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc5155a0475d84f3e21e65987b7e7762
https://doi.org/10.1007/bf00307323
https://doi.org/10.1007/bf00307323
Autor:
G. R. Tilton
Publikováno v:
Mineralogical Magazine. :1521-1522
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ddf9ffa894bead407dd26dae798e73a
https://doi.org/10.1180/minmag.1998.62a.3.132
https://doi.org/10.1180/minmag.1998.62a.3.132
Publikováno v:
Canadian Journal of Earth Sciences. 24:24-30
Rb–Sr and U–Pb data from the Borden complex of northern Ontario, a carbonatite associated with the Kapuskasing Structural Zone, indicate a mid-Proterozoic age. A 207Pb/206Pb age of 1872 ± 13 Ma is interpreted as the emplacement age of this body,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cdf5953703d745ced97a594106b6c9c
https://doi.org/10.1139/e87-003
https://doi.org/10.1139/e87-003
Publikováno v:
Tectonics. 8:719-727
Isotopic investigations from the Hercynian-age fold belt between the Kazakhstan and Siberian cratons in the West Junggar region determine the timing of tectonic evolution and the petrogenesis of the granitic rocks of the region. Sphene from the leuco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4bc0e361c9642bf6f1483f5ffbfc64a
https://doi.org/10.1029/tc008i004p00719
https://doi.org/10.1029/tc008i004p00719
Publikováno v:
Tectonics. 8:729-752
The West Junggar region of northwestern China consists of a Hercynian-age fold belt occupying a late Paleozoic zone of convergence between three major Eurasian plates: Siberian, Tarim, and Kazakhstan. The northern part of the West Junggar area includ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d027b15e686dc63a666730cfaebef19f
https://doi.org/10.1029/tc008i004p00729
https://doi.org/10.1029/tc008i004p00729
Publikováno v:
The Journal of geology, 72 (1
Zircon and K-feldspar have been concentrated from four composite samples of river and beach sands, representing the east and west coasts of North America, the northern Mississippi River, and the total drainage of the Mississippi River. First order ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cd05bdaf2ed686e0abce992eef75f55
https://doi.org/10.1086/626967
https://doi.org/10.1086/626967
Publikováno v:
The Journal of Geology. 70:74-88
New mineral age measurements are reported from several subdivisions of the Finnish Precambrian. Samples of zircon, feldspar, and muscovite collected from the gneissose pre-Karelian basement area in eastern Finland indicate an age of about 2,700 milli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c9f0772f46dcbc82dfb1bf2ceb92364
https://doi.org/10.1086/626794
https://doi.org/10.1086/626794
Publikováno v:
Journal of Geophysical Research. 70:1947-1968
Paleozoic regional metamorphism of Precambrian gneiss near Baltimore, Maryland, altered the lead-isotope ratios in Precambrian feldspars but did not affect the Rb-Sr ages. This fact indicates that the alteration took place without solution and redepo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74251186117b7e84c80f0b7e3d5b0c3c
https://doi.org/10.1029/jz070i008p01947
https://doi.org/10.1029/jz070i008p01947
Autor:
R. H. Steiger, G. R. Tilton
Publikováno v:
Journal of Geophysical Research. 74:2118-2132
Granitic rocks at Manitouwadge, Ontario, have an age of 2720±50 m.y. based on isotopic lead data from zircon and sphene, and on Rb-Sr measurements from whole rocks. The rocks are stratigraphically and lithologically similar to ones called Algoman el
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80773d11c5a450c598aca823deb7214f
https://doi.org/10.1029/jb074i008p02118
https://doi.org/10.1029/jb074i008p02118