Results 81 to 90 of about 23,165 (232)
An archean suture zone in the Tobacco Root Mountains? (1984) Evolution of Archean Continental Crust, SW Montana (1985) [PDF]
The Lake Plateau area of the Beartooth Mountains, Montana were mapped and geochemically sampled. The allochthonous nature of the Stillwater Complex was interpreted as a Cordilleran-style continental margin.
Kain, L., Mogk, D. W.
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Physicochemical conditions of the formation of the Larino granite-gneiss dome (South Ural)
GeoresursyThe Larino granite-gneiss dome is located on the border of the Aramil-Sukhtelya and Magnitogorsk megazones and is a two-headed anticlinal structure, the nuclear parts of which are composed of granitoids of the Pervomai and Larino massifs, and their ...
V. I. Snachev +2 more
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Rapport Grønlands Geologiske Undersøgelse, 1982 Detailed mapping of the north-west quadrant of the 1: 100 000 scale Isukasia geological map sheet was begun in 1981 (fig. 16). The area was previously visited during the 1977 helicopter reconnaissance mapping programme (Allaart et al., 1978) and from this work the stratigraphy was known only in the broadest of terms.
R.P Hall, D.J Hughes
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Regional variation in the Amitsoq gneisses related to crustal levels during late Archean granulite facies metamorphism: Southern west Greenland [PDF]
The dominant lithology at Kangimut sangmissoq is described as nebulitic tonalitic gneiss containing highly distended plagioclase phyric amphibolites. The gneiss amphibolite complex was intruded by Nuk gneiss between 3.05 and 2.90 Ga and later (2.6 to 2.7
Bridgwater, D. +2 more
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Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland [PDF]
, 2015 Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history.
Bird, A. F. +3 more
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Discover GeoscienceLogbadjeck is situated in the northern edge of the Congo Craton, Nyong Series, Cameroon. This paper presents the petrographic and geochemical characteristics of biotite gneiss and amphibolite mined as aggregates and the environmental impact of quarrying ...
Anicet Feudjio Tiabou +5 more
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Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2015 Our recent studies of metamorphism within the Fennoscandian (or Baltic) Shield area with representative sites of orogenic gold mineralization based on the scheme of mineral facies of metamorphic rocks introduced earlier inspired thorough revision of that
Сергей Алексеевич Бушмин +3 more
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Significance of the late Archaean granulite facies terrain boundaries, Southern West Greenland [PDF]
Three distinct episodes and occurrences of granulite metamorphism in West Greenland are described: (1) the oldest fragmentary granulites occur within the 3.6-Ga Amitsoq gneisses and appear to have formed 200 Ma after the continental crust in which they ...
Friend, C. R. L. +2 more
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The Sanford Underground Research Facility at Homestake
, 2014 The former Homestake gold mine in Lead, South Dakota is being transformed into a dedicated laboratory to pursue underground research in rare-process physics, as well as offering research opportunities in other disciplines such as biology, geology and ...
Heise, J.
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Varying rock responses as an indicator of changes in CO2-H2O fluid composition [PDF]
The formation of the late Archean charnockite zone of southern India was ascribed to dehydration recrystallization due to an influx of CO2. Pressure temperature conditions for the metamorphism were calculated at about 750 C and 7.5 Kbar.
Friend, C. R. L.
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