Zobrazeno 1 - 10
of 171
pro vyhledávání: '"H. Huhma"'
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 86, Iss 1, Pp 41-55 (2014)
The origin of the Vaasa migmatite complex was studied by using whole-rock Sm-Nd and zircon Lu-Hf and U-Pb data in conjunction with whole-rock major and trace element geochemistry. The concordia ages of five Vaasa area granitoid samples are 1.88–1.8
Externí odkaz:
https://doaj.org/article/be374f04b11b4815b44f039282099256
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 86, Iss 1, Pp 23-40 (2014)
We present new isotopic data (U-Pb and Sm-Nd) from the Neoarchean granitoids of the Lentua complex, which is a part of the Western Karelia subprovince of the Fennoscandian Shield. Compositionally, the samples are granitoids belonging to the sanukitoi
Externí odkaz:
https://doaj.org/article/680244ee5382467a8cde0a6503c6e079
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 84, Iss 2, Pp 85-120 (2012)
This paper gives the first description of a newly-recognized, basin-wide metasedimentary unit in the Paleoproterozoic (~2.4–1.9 Ga) Peräpohja Belt, northern Finland. The unit, which is named the Petäjäskoski Formation (PFm) after the single loca
Externí odkaz:
https://doaj.org/article/ae2f9378876d4a4d890a8e084fcf79d8
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 82, Iss 2, Pp 81-100 (2010)
Mafic and felsic intrusive rocks aged 2.5-2.4 Ga have been observed over a large area in eastern and northern Finland, as well as in adjacent northwestern Russia. We describe three granite intrusions and associated dykes from Kainuu, Finland, that be
Externí odkaz:
https://doaj.org/article/735439a33f1e4866b9d8de86320dba16
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 82, Iss 1, Pp 31-62 (2010)
Using the SIMS, ID-TIMS and Sm-Nd isotopic methods and the electron microprobe, we have studied several differentiated mafic intrusions of the c. 2.2 Ga gabbro-wehrlite association (GWA) from four Paleoproterozoic schist belts and the Archean Kuhmo G
Externí odkaz:
https://doaj.org/article/2595b64d725b4463b2ef3dcdf5642f3a
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 81, Iss 1, Pp 7-38 (2009)
The ~1.8 Ga Nattanen-type granites in the Finnish Lapland and western Kola Peninsula are found as several relatively small, high-level, discordant plutons that are easily discernible as weak maxima on aeromagnetic maps. We present U–Pb mineral isot
Externí odkaz:
https://doaj.org/article/57a4b53f202f4fff8a87435f44bbb4a0
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 79, Iss 2, Pp 143-174 (2007)
Zircons from twelve Palaeoproterozoic granitoids from the Central Lapland Granitoid Complex (CLGC) and from the Hetta Complex (HC) in northern Finland were dated using the NORDSIM ion microprobe. In addition, U-Pb age determinations on zircons from t
Externí odkaz:
https://doaj.org/article/3863ffd52fa9477ea9584b8863b86c1d
Autor:
H.V. Makkonen, H. Huhma
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 79, Iss 2, Pp 175-201 (2007)
Sm-Nd data were determined for eight mafic-ultramafic intrusions from the Svecofennian (1.88 Ga) Kotalahti Nickel Belt, Finland. The intrusions represent both mineralized and barren types and are located at varying distances from the Archaean/Protero
Externí odkaz:
https://doaj.org/article/acf802a2965548ec92317d3f8b972d87
Autor:
K. Laajoki, H. Huhma
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 78, Iss 2, Pp 177-182 (2006)
Externí odkaz:
https://doaj.org/article/4b843bd13c6a4021b05651187482c643
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 78, Iss 2, Pp 143-175 (2006)
The migmatitic metapelites of the Lapland granulite belt (LGB) in the NE part of the Fennoscandian Shield represent an arc-related greywacke basin metamorphosed in the granulite facies. Detrital zircons from migmatitic metapelites are derived from 1.
Externí odkaz:
https://doaj.org/article/b1b77263775d4b73a7166c1d4482fc04