Zobrazeno 1 - 10
of 201
pro vyhledávání: '"F Kalsbeek"'
Autor:
Urbain Wenmenga, F. Kalsbeek, M.S. Tairou, D. Chala, Maurice Kwékam, Pascal Affaton, A. Houéto, C. Tossa
Publikováno v:
Journal of African Earth Sciences. 111:387-398
The analysis of structural markers collected from the petrostrutural units of Parakou-Nikki, in Northeast Benin, indicates that the Pan-African remobilization or rejuvenation (600 ± 50 Ma) of the Benino-Nigerian Metacraton consits of a wide migmatiz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa473ee033cdba3c27a9cacf767cb0e3
https://doi.org/10.1016/j.jafrearsci.2015.08.009
https://doi.org/10.1016/j.jafrearsci.2015.08.009
Autor:
F Kalsbeek, A.P Nutman
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 161:35-38
SHRIMP zircon U-Pb data for tonalite intruding greenschist of the Tartoq (group have yielded an age of 2944 ± 7 Ma. This date is interpreted as giving the time of igneous crystallisation of the tonolite and provides a minimum age for deposition of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00cfd514bb4fc4f86f55c8571f70430b
https://doi.org/10.34194/rapggu.v161.8241
https://doi.org/10.34194/rapggu.v161.8241
Autor:
F Kalsbeek
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 160:37-40
Information about the age and plate-tectonic setting of Precambrian basement terrains is of major importance for the evaluation of their mineral potential. The Geological Survey of Greenland (GGU) has therefore over the last two decades collected and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::231b1c8772600d744acd9e8c198615a2
https://doi.org/10.34194/rapggu.v160.8227
https://doi.org/10.34194/rapggu.v160.8227
Autor:
F Kalsbeek, A.P Nutman
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 162:129-133
SHRIMP U-Pb isotope data on zircon crystals from a gneiss sample near Danmarkshavn, where the presence of Archaean rocks has earlier been documented, show that the rock has undergone a complex history of igneous and metamorphic zircon growth. At leas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::041c075a3d4c613e62b258bfe0b8a1da
https://doi.org/10.34194/rapggu.v162.8254
https://doi.org/10.34194/rapggu.v162.8254
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 162:139-151
The Grandjean Fjord – Bessel Fjord region (75°–76°N) contains the northernmost occurrences of Caledonian granites in North-East Greenland. Most of them have been emplaced along the margins of a sequence of late Proterozoic sediments, the Eleono
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c5a1a4f8004bb1e7e0f700d0b8b1649
https://doi.org/10.34194/rapggu.v162.8256
https://doi.org/10.34194/rapggu.v162.8256
Autor:
F Kalsbeek, P.N Taylor
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 159:89-93
Sm-Nd model ages for ten basement gneisses and intrusive rocks from the Skjoldungen area in South-East Greenland range from 2.73 to 2.91 Ga. Two rocks yielded older ages: a high-grade metasedimentary rock (2.96 Ga) and a pegmatite (3.13 Ga). Sm-Nd da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b625312787b819e8989f9cd89ddc3c86
https://doi.org/10.34194/rapggu.v159.8215
https://doi.org/10.34194/rapggu.v159.8215
Autor:
F Kalsbeek
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 159:95-100
In high-grade metamorphic terrains it is often not possible to determine the relative age of metasedimentary units by field investigation. However, the time of deposition of the original sediment can be constrained by consideration of the Sr-isotopic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e859620d0ed5ed27bda1b54f6970e081
https://doi.org/10.34194/rapggu.v159.8216
https://doi.org/10.34194/rapggu.v159.8216
Geochemical mapping and geological reconnaissance in the Nagssugtoqidian mobile belt, West Greenland
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 159:31-37
The Early Proterozoic Nagssugtoqidian mobile belt is geologically poorly known despite its location in the more populated part of West Greenland (Fig. 1). A detailed geological map (1:100 000; Olesen, 1984) is available for the western part of the No
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a81b110c7680b99b30f32205df01b7d4
https://doi.org/10.34194/rapggu.v159.8204
https://doi.org/10.34194/rapggu.v159.8204
Autor:
F.G Christiansen, F Kalsbeek
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 155:36-41
One of GGU's major field activities in 1991 took place in July and August in the Disko Bugt region of central West Greenland. This was the third year of field investigations under the 'Disko Bugt Project', planned for 1999–1992, with one summer's b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c51c3d0f00bad2db99bcdd523a84d4f0
https://doi.org/10.34194/rapggu.v155.8178
https://doi.org/10.34194/rapggu.v155.8178
Publikováno v:
Rapport Grønlands Geologiske Undersøgelse. 152:95-102
Three structural elements of the East Greenland Caledonides are present in Hertugen af Orleans Land: (1) a marginal NNE-SSW trending zone of crystalIine basement rocks overlain by middle Proterozoic sediments (Trekant Series) in the westernmost nunat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::858ca78c9a1de2e98e26c6530a22495f
https://doi.org/10.34194/rapggu.v152.8162
https://doi.org/10.34194/rapggu.v152.8162