Petrogenetic meaning of zircon growth stages in metasediments
, 2012 The Cenerigneisses, amphibolite facies metasediments from Serie dei Laghi (Southern Alps), contain heterogeneous zircon populations which gave ages spanning from around 430 to more than 1000 Ma.
V. Caironi
core +2 more sources
Geochemistry, Geophysics, GeosystemsIn subduction zones, the locked seismogenic zone is bordered by an upper and a lower transition zone. In these transition zones, deformation is primarily accommodated by an interplay of diffuse viscous deformation within a weak matrix and brittle ...
L. Casoli, A. Petroccia, F. Giuntoli
doaj +2 more sources
PETROGRAPHY AND GEOCHEMISTRY OF METASEDIMENTS FROM BUGAJI, PART OF MALUMFASHI SHEET 79 NE, KANO STATE, NORTHWESTERN NIGERIA [PDF]
Geological Behavior, 2023 This research is aimed at determining the protolith of metasediments that underpin the geology of Bugaji region of Kano State. The study area was mapped systematically and the lithologies encountered include phyllite, undifferentiated schist, quartzo ...
Abdullah Musa Ali +1 more
doaj +1 more source
Rheology of Metasedimentary Rocks at the Base of the Subduction Seismogenic Zone
Geochemistry, Geophysics, Geosystems, 2022 The Arosa Zone, Central Alps, represents a Cretaceous to Paleogene fossil subduction interface from paleodepths of 10 to >35 km. Metasedimentary schists directly below a preserved seismogenic zone exhibit viscous (foliations, folds, and lineations) and ...
Cailey B. Condit +5 more
doaj +1 more source
Geophysical Monograph Series, Page 263-304., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside +3 more
wiley +1 more source
A revision of the Proterozoic-Archean boundary of the Northern Bothnian schist belt with a discussion of the geochemistry of related basic metavolcanics [PDF]
Bulletin of the Geological Society of Finland, 1986 Geophysical analysis suggests the need for a revision of the eastern border of the early Proterozoic Northern Bothnian (or Kiiminki) schist belt. Recent geological field work has revealed places where the discordance and hiatus between Proterozoic and ...
Y. Kähkonen, E. Mattila, J. Nuutilainen
doaj +1 more source
On the Karelides in the Tohmajärvi area, eastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1971 The evolution of the Karelides in the Tohmajärvi area is discussed. The Karelidic schists (metasediments) are devided into two stratigraphic groups, the Jatulian and the Kalevian, which likewise represent two different sedimentation facies.
O. Nykänen
doaj +1 more source
Evolution of migmatitic granulite complexes: Implications from Lapland Granulite Belt, Part II: Isotopic dating [PDF]
Bulletin of the Geological Society of Finland, 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 1.94 −
P. Tuisku, H. Huhma
doaj +1 more source
The Lapland greenstone belt: Stratigraphic and depositional features in northern Finland [PDF]
Bulletin of the Geological Society of Finland, 1987 The Lapland greenstone belt formed in a continental environment, as a result of rifting of the 3.1—3.0 Ga Saamian craton. The basin subsided to a depth of five kilometres between 3.0—2.5 Ga and contains a sequence which is subdivided into Lower, Middle ...
M. Saverikko
doaj +1 more source
Geosciences, 2022 Geological mapping, stratigraphic observations, and U/Pb dating allow reconstructing the pre-orogenic setting of the transition zone between the distal European passive margin and the Alpine Tethys in the southwestern Alps.
Gianni Balestro +4 more
doaj +1 more source