Results 31 to 40 of about 7,681 (257)

Petrology, geochemistry, and geochronology of the leucogranites in southernmost Finland [PDF]

Bulletin of the Geological Society of Finland
In the southernmost part of the Svecofennian province in Finland, leucogranites and migmatites stemming from both igneous and sedimentary protoliths reflect the complex magmatic history of the Svecofennian orogeny between 1.89 and 1.82 Ga.
Anna Saukko, Kaisa Nikkilä, Olav Eklund, Sören Fröjdö, Markku Väisänen   +4 more
doaj   +1 more source

Contrasted tectonic styles for the Paleoproterozoic evolution of the North China Craton. Evidence for a ~2.1 Ga thermal and tectonic event in the Fuping Massif [PDF]

, 2008
International audienceStructural analysis along with 40Ar–39Ar and U–Pb datings in the Fuping massif provide new insight into the evolution of the eastern part of the Trans-North China Belt (North China Craton), from 2.7 Ga to 1.8 Ga.
Bruguier, Olivier, Faure, Michel, Lin, Wei, Monié, Patrick, Trap, Pierre   +4 more
core   +2 more sources

The role of shearing in the Proterozoic development of the Åland archipelago, S.W. Finland [PDF]

Bulletin of the Geological Society of Finland, 1987
tion of a regional tectonochronology. Folds with E—W axial traces and associated shear zones which are characteristic of the southern Finland migmatite belt (1800 Ma) were refolded during a late phase of NW—SE shearing.
N.P. Branigan
doaj   +1 more source

Experimental investigation on the application of the aggregate of gneiss-based migmatite in asphalt mixture of AC-13

Cogent Engineering, 2019
In this research, the aggregate of acid migmatite and its application in the asphalt mixture were evaluated experimentally. In order to study the performance of asphalt mixture with the aggregate of acid migmatite, four different compositions of mixtures
Erhu Yan, Yan Gong, Rong Chang, Zhijun Wang, Jian Xu   +4 more
doaj   +1 more source

Th–U–total Pb monazite geochronology records Ordovician (444 Ma) metamorphism/partial melting and Silurian (419 Ma) thrusting in the Kåfjord Nappe, Norwegian Arctic Caledonides

Geologica Carpathica, 2019
The northern extent of the Scandinavian Caledonides includes the Skibotn Nappe Complex of still debated structural position. This paper is focused on part of this complex and presents new U–Th–total Pb monazite dating results for the migmatitic gneiss of
Ziemniak Grzegorz, Kośmińska Karolina, Petrík Igor, Janák Marian, Walczak Katarzyna, Manecki Maciej, Majka Jarosław   +6 more
doaj   +1 more source

Modeling the impact of melt on seismic properties during mountain building [PDF]

, 2017
Initiation of partial melting in the mid/lower crust causes a decrease in P-wave and S-wave velocities; recent studies imply that the relationship between these velocities and melt is not simple.
Akselsen, Aleksandrov, Aleksandrov, Aleksandrov, Amicia L. Lee, Anderson, Andrew M. Walker, Arzi, Babuška, Bachmann, Backus, Bass, Bastow, Bauchy, Berger, Blackman, Bottinga, Brown, Brown, Brown, Caldwell, Caldwell, Cornwell, Elvevold, Eshelby, Faul, Fontaine, Garapić, Geoffrey E. Lloyd, Hammond, Hammond, Hammond, Hammond, Hammond, Harmon, Hearmon, Henry, Hiraga, Hiraga, Hirn, Hollister, Holness, Holness, Holtzman, Holtzman, Jackson, Jackson, Jamieson, Jaxybulatov, Karato, Karato, Kelemen, Kind, Kohlstedt, Krogh, Kumazawa, Kushiro, Lejeune, Lemonnier, Levien, Lin, Lloyd, Lloyd, Lloyd, Mainprice, Mainprice, Mainprice, Mainprice, Makovsky, Mavko, Mavko, Mckenzie, McSkimin, Menegon, Nelson, Nábělek, O'Connell, Oliver, Platt, Rivers, Roberts, Roberts, Rosenberg, Rutter, Sawyer, Scarfe, Schilling, Schmeling, Sturt, Taija Torvela, Takei, Takei, Tandon, Tatham, Taylor, Teyssier, Torvela, Unsworth, Vanderhaeghe, Vanderhaeghe, Vanderhaeghe, Walker, Walker, Walsh, Watanabe, Wei, Weidner, Whitney, Wimmenauer, Xie   +109 more
core   +1 more source

Structure of a Variscan migmatite-granite transition zone (N Sardinia, Italy)

Journal of Maps, 2023
This paper presents the structural map of the Barrabisa Complex, an E-W ribbon-like migmatitic massif exposed in the northern part of Sardinia. The migmatites consist of metatexites and diatexites with variable melt proportion, grading in the central ...
M. De Luca, N. Ruberti, G. Oggiano, Ph. Rossi, V. Pascucci, L. Casini   +5 more
doaj   +1 more source

Multianalytical provenance analysis of Eastern Ross Sea LGM till sediments (Antarctica): Petrography, geochronology, and thermochronology detrital data [PDF]

, 2017
In order to reveal provenance of detrital sediments supplied by West Antarctic Ice Sheet (WAIS), 19 glaciomarine cores of Last Glacial Maximum age were analyzed from Eastern Ross Sea and Sulzberger Bay.
Andreucci, Benedetta, Langone, Antonio, Perotti, Matteo, Talarico, Franco, Zattin, Massimiliano   +4 more
core   +2 more sources

The TTG-Amphibolite Terrains of Arctic Fennoscandia: Infinite Networks of Amphibolite Metatexite-Diatexite Transitions

Frontiers in Earth Science, 2020
The Earth’s early basaltic crust converted episodically into felsic TTG (tonalite-trondhjemite-granodiorite) crust by unknown tectonic processes. To contribute to the debate on the possible tectonic settings of TTGs, this article illustrates and explains
Jaana Halla
doaj   +1 more source

An occurrence of monazite in Puumala, eastern Finland [PDF]

Bulletin of the Geological Society of Finland, 1969
A monazite occurrence consisting of three monazite-bearing biotite-rich veins is described. The veins have pegmatitic affinities but are very inhomogeneous.
I. Haapala, P. Ervamaa, A. Löfgren, P. Ojanperä   +3 more
doaj   +1 more source