Results 21 to 30 of about 6,915,919 (256)

Rb-Sr whole-rock isotopic study of late Archaean and early Proterozoic granitoid intrusions, Kainuu, Eastern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1988
A tonalite-granodiorite-granite suite emplaced during the late Archaean D3 deformational phase yields a six point isochron age of 2,500 ± 270 Ma and an initial 87Sr/86Sr of 0.7044 ±0.0018.
A.N. Halliday   +2 more
doaj   +1 more source

Absolute luminosity measurements with the LHCb detector at the LHC [PDF]

open access: yes, 2012
Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the ...
Albrecht, J   +999 more
core   +2 more sources

Timing of Svecofennian crustal growth and collisional tectonics in Åland, SW Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2004
In an effort to quantify the time parameter in the tectonomagmatic evolution of what has been called the Southern Svecofennian Arc Complex (SSAC) of SW Finland, advanced radiometric dating techniques have here been applied to rock groups of key ...
C. Ehlers, T. Skiöld, M. Vaasjoki
doaj   +1 more source

Mid- and late-Holocene shoreline changes along the southern coast of the Gulf of Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2013
In response to glacio-isostatic rebound in Estonia, a relative sea level fall occurred during the mid- and late-Holocene, and as a result, lowland regions in northern Estonia have experienced an evolution from sea to land.
I. Grudzinska   +3 more
doaj   +1 more source

Stratigraphical evidence of Baltic water level changes between 8 and 6 ka BP in a small lake basin on the coast of the Gulf of Finland, SE Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1997
A sediment core from Lake Saarasjärvi at 19.5 m a.s.l. in Virolahti near the coast of the Gulf of Finland, SE Finland, was studied for lithology and diatom stratigraphy.
A. Miettinen, H. Hyvärinen
doaj   +1 more source

Quaternary chronostratigraphy - a review [PDF]

open access: yesBulletin of the Geological Society of Finland, 1992
Quaternary development is characterized by strong climatic fluctuations associated with repeated glacier expansions. Consequently the Quaternary chronostratigraphy is largely based on the dating of climatic fluctuations which have led to large-scale ...
M. Eronen
doaj   +1 more source

Endoscopic therapeutic procedures stratified by age—Absolute numbers.

open access: yes, 2019
Endoscopic therapeutic procedures stratified by age—Absolute numbers.
Jiří Šnajdauf (6239705)   +11 more
core   +2 more sources

1.90-1.88 Ga arc and back-arc basin in the Orijärvi area, SW Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2002
The Orijärvi area within the Uusimaa Belt is a key area in resolving the stratigraphy and tectonic setting of the Southern Svecofennian Arc Complex in southern Finland.
M. Väisänen, I. Mänttäri
doaj   +1 more source

Geochronology of the Suomenniemi rapakivi granite complex revisited: Implications of point-specific errors on zircon U-Pb and refined λ87 on whole-rock Rb-Sr [PDF]

open access: yesBulletin of the Geological Society of Finland, 2015
Multi-grain isotope dilution and secondary ion microprobe zircon U-Pb as well as wholerock Rb-Sr isotope dilution data on the late Paleoproterozoic Suomenniemi rapakivi granite complex (exposed on the northern flank of the Wiborg batholith in ...
O.T. Rämö, I. Mänttäri
doaj   +1 more source

Absolute Age of Euxenite from Antarctica

open access: yesAntarctic Record, 1961
南極地方Lutzow-Holm Bayの東海岸,Skallen地区に見出された花崗岩ペグマタイト中の強放射性鉱物,ユークセン石の年令決定を鉛法により行ない,Pb-206/U-238,Pb-207/U-235,Pb-208/Th-232,Pb-207/Pb-206の比を測定することによって年令を算出した.従来,しばしば異常な値を示すと考えられているPb-208/Th-232の比を除けは,他の三つの比から得られる年令は相当によい一致を示し,平均約470×10^5年程度である.最近AHRENSらは著者の一人 ...
Nobufusa SAITO   +2 more
doaj   +1 more source

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