Zobrazeno 1 - 8
of 8
pro vyhledávání: '"R. H. Steiger"'
Autor:
P. Stille, R. H. Steiger
Publikováno v:
Contributions to Mineralogy and Petrology. 107:273-278
First initial-Hf isotopic compositions for samples from the Alpine domain are presented and discussed. The results are mainly based on zircons and a few whole rocks with ages between 30 and 450 Ma. Of those so far analyzed, the present-day Hf isotopi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37dbd5cd58cc16bcbcafd51107764595
https://doi.org/10.1007/bf00325098
https://doi.org/10.1007/bf00325098
Publikováno v:
The Journal of Geology. 87:475-495
The southern part of the Caledonian fold belt in East Greenland comprises a complex of pre-Caledonian rock units as demonstrated by numerous age determinations and interpretation of field work. U-Pb isotopic age determinations on zircons, Rb-Sr analy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e143e481e7b48a01d000ca153c408d10
https://doi.org/10.1086/628441
https://doi.org/10.1086/628441
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 134:5-18
Five new U-Pb age determinations on zireons and three new or reanalysed Rb-Sr age determinations of some of the late orogenie plutonic bodies from the Gåseland - Stauning Alper migmatite and granite zone in the Scoresby Sund region, give Caledonian
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d10efb771ef39374627ea9c2082c0aa5
https://doi.org/10.34194/rapggu.v134.7986
https://doi.org/10.34194/rapggu.v134.7986
Autor:
P. D. Nunes, R. H. Steiger
Publikováno v:
Contributions to Mineralogy and Petrology. 47:255-280
U-Pb analyses of zircons from the southern paragneiss zone of the Gotthard massif in the central Alps indicate these rocks were derived from one or more source areas ≧ 1400 m.y. old and were strongly affected by both the Caledonian and Hercynian or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23789edbef9468b2ea7752f4f15fe8fe
https://doi.org/10.1007/bf00390150
https://doi.org/10.1007/bf00390150
Publikováno v:
Bulletin of the Geological Society of Denmark. 29:151-160
Rb-Sr, U-Pb and K-Ar analyses on rocks and minerals from a tectonic window below a Caledonian thrust sheet in the westernmost part of the Scoresby Sund region (70°-72°N) give evidence for a Precambrian age of formation. The Charco't Land supracrust
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75e701eb20585d7074ed39c96c507115
https://doi.org/10.37570/bgsd-1980-29-10
https://doi.org/10.37570/bgsd-1980-29-10
Autor:
George R. Tilton, R. H. Steiger
Publikováno v:
Science. 150:1805-1808
Calculations based on comparison of the isotopic composition of lead from iron meteorites with that of various modern terrestrial leads have placed the age of the earth at around 4550 million years. However, recent data from young volcanic rocks reve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c18e50656cd6ab5d6130ad0d988abb0c
https://doi.org/10.1126/science.150.3705.1805
https://doi.org/10.1126/science.150.3705.1805
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
Publikováno v:
Contributions to Mineralogy and Petrology
ResearcherID
ResearcherID
New Hornblende K-Ar and 39Ar-40Ar and mica Rb-Sr and K-Ar ages are used to place specific timemarks on a well-constrained pressure-temperature path for the late Alpine metamorphism in the Western Tauern Window. After identification of excess 40Ar the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::288a92c0b0be8cec535beb56e070a04d
https://gfzpublic.gfz-potsdam.de/pubman/item/item_237639
https://gfzpublic.gfz-potsdam.de/pubman/item/item_237639
