REE patterns for apatites from Proterozoic phosphatic metasediments, Finland [PDF]
Bulletin of the Geological Society of Finland, 1983 Several occurrences of uranium- and apatite-bearing metasediments are known in the Precambrian of Finland. The characteristic rock types in the occurrences: metaphosphorite, apatite-bearing carbonate and calc-silicate rocks and apatite-quartz-feldspar ...
P. Rehtijärvi
doaj +3 more sources
P‐ and S‐Wave Velocities of Exhumed Metasediments From the Alaskan Subduction Zone: Implications for the In Situ Conditions Along the Megathrust [PDF]
Geophysical Research Letters, 2021 The in situ state and properties of sediments entrained along subduction megathrusts exert key controls on their mechanics and slip behavior. Low seismic velocity and high Vp/Vs are hypothesized to indicate highly elevated fluid pressure, and are invoked
Peter K. Miller +6 more
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Machine learning and remote sensing-based lithological mapping of the Duwi Shear-Belt area, Central Eastern Desert, Egypt [PDF]
Scientific ReportsMachine learning and remote sensing techniques are widely accepted as valuable, cost-effective tools in lithological discrimination and mineralogical investigations.
Sobhi M. Ghoneim +5 more
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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
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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
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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
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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
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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
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Oxygen and nitrogen isotopes as tracers of fluid activities in serpentinites and metasediments during subduction [PDF]
, 2007 International audienceSummary N and O isotope systematics of a suite of high-pressure (HP) and ultrahigh-pressure (UHP) metasediments of the Schistes Lustrés nappe and metaperidotites of the Erro Tobbio Massif from the Alpine-Appennine system are ...
Scambelluri, M. +7 more
core +5 more sources