Zobrazeno 1 - 10
of 22
pro vyhledávání: '"W. G. Libby"'
Publikováno v:
Australian Journal of Earth Sciences. 46:851-860
Rb–Sr dating of biotite in the northwestern corner of the Yilgarn Craton identified four areas with distinctive age ranges. Biotite in the northwestern area, which includes the Narryer Terrane and part of the Murchison Terrane, yields reset Rb–Sr
Autor:
J.R. De Laeter, W. G. Libby
Publikováno v:
Australian Journal of Earth Sciences. 45:623-632
Most whole‐rock Rb‐Sr dates on plutonic rocks of the Yilgarn Craton of Western Australia cluster closely around 2650 Ma. Biotite Rb‐Sr dates tend to be 150 to 450 million years younger than the whole‐rock dates except at the western margin of
Autor:
W. G. Libby, J.R. De Laeter
Publikováno v:
Australian Journal of Earth Sciences. 40:445-453
Biotite from granite and gneiss in the southwestern part of the Yilgarn Craton near Perth has been dated by the Rb‐Sr technique at about 430–500 Ma in a belt at the western edge of the craton. The belt widens southward from 30 km near Perth to 55
Publikováno v:
Australian Journal of Earth Sciences. 32:349-358
New Rb‐Sr, Sm‐Nd and Pb‐Pb data are presented from banded gneisses in the Mt Narryer region of the Western Gneiss Terrain, together with Rb‐Sr and Sm‐Nd data from cross‐cutting granite sheets. The Meeberrie Gneiss, which previously gave a
Publikováno v:
Journal of the Geological Society of Australia. 30:333-340
This paper continues a survey of Sm‐Nd age relationships at the margins of the Yilgarn Block, Australia's largest Archaean craton. Model ages have been determined along an irregular transect extending approximately 120 km from the extreme SW of the
Publikováno v:
Precambrian Research. 38:343-354
The Sm-Nd, Pb-Pb and Rb-Sr systems in Manfred Complex samples ranging from metaleucogabbro to metapyroxenite indicate formation of the complex ∼ 3700 Ma ago and multiple metamorphic disturbances over the succeeding ∼ 2000 Ma. The isotopic respons
Publikováno v:
Australian Journal of Earth Sciences. 34:523-525
(1987). Geological note: Sm‐Nd dating of the 2411 Ma Jimberlana dyke, Yilgarn Block, Western Australia. Australian Journal of Earth Sciences: Vol. 34, No. 4, pp. 523-525.
Publikováno v:
Nature. 292:322-324
The Yilgarn Block is an ancient crustal block which extends over ∼650,000km2 in the south-west of Western Australia and consists of high-grade gneiss and granite–greenstone terrains1. Being one of the largest segments of Archaean crust in the wor
Publikováno v:
Canadian Journal of Earth Sciences. 5:955-957
Nelson plutonic rocks in Slocan Mining Camp were emplaced at least 160 m.y. ago (base of the Upper Jurassic). K–Ar apparent ages for intrusions of lamprophyre and Valhalla plutonic rocks are indistinguishable from those for Nelson plutonic rocks. Y
Autor:
Bailey, Lucy E., Graves, Karen
Publikováno v:
Review of Research in Education; 2016, Vol. 40 Issue 1, p682-722, 41p