Results 21 to 30 of about 3,576 (220)

Contribution of remote sensing techniques to the recognition of titanite occurrences at Gabal El-Degheimi area, Central Eastern Desert, Egypt

Egyptian Journal of Remote Sensing and Space Sciences, 2017
The present study aims at delimiting the titanite occurrences in the volcaniclastic metasediments and accessing the mineral chemistry of the titanite at Gabal El-Degheimi area.
Ahmed E. Khalil, Hatem M. El-Desoky, S.M. Salem   +2 more
doaj   +1 more source

The Araxá Group in the South-Southwest Region of the Goiás State [PDF]

Geologia USP. Série Científica, 2013
In the S – SW region of Goiás State, Brazil, the Araxá Group is constituted of a metasedimentary sequence containing schistoseand gneissic (garnet-biotite-quartz schists, feldspatic garnet-biotite-quartz schists, garnet-biotite-quartz paragneisses,with ...
Guillermo Rafael Beltran Navarro, Antenor Zanardo, Fabiano Tomazini da Conceição   +2 more
doaj   +1 more source

Evolution of migmatitic granulite complexes: Implications from Lapland Granulite Belt, Part I: Metamorphic geology [PDF]

Bulletin of the Geological Society of Finland, 2006
The Palaeoproterozoic Lapland granulite belt was juxtaposed between Archaean and Proterozoic terrains in the NE part of the Fennoscandian Shield concurrently with the accretion of Svecofennian arc complexes at ~1.9 Ga.
P. Tuisku, P. Mikkola, H. Huhma
doaj   +1 more source

Establishing Provenance from Highly Impoverished Heavy Mineral Suites: Detrital Apatite and Zircon Geochronology of Central North Sea Triassic Sandstones

Geosciences, 2022
A study of Triassic sandstones in the central North Sea, UK, has shown that combined detrital zircon and apatite geochronology and apatite trace element analysis is a powerful tool for reconstructing provenance for sandstones with diagenetically ...
Iain P. Greig, Andrew Morton, Dirk Frei, Adrian Hartley   +3 more
doaj   +1 more source

Geology of the Saint-Marcel valley metaophiolites (Northwestern Alps, Italy)

Journal of Maps, 2017
The geological map of the Saint-Marcel valley at the scale of 1:20,000 illustrates the tectonic setting of metaophiolites from the southern Aosta Valley, in the Italian side of the Western Alpine belt.
Paola Tartarotti, Silvana Martin, Bruno Monopoli, Luca Benciolini, Alessio Schiavo, Riccardo Campana, Irene Vigni   +6 more
doaj   +1 more source

Geochemistry, provenance, and tectonic setting of Paleoproterozoic metasedimentary and metavolcanic units of the Estonian Alutaguse region, eastern Fennoscandia [PDF]

Estonian Journal of Earth Sciences
This research focuses on the geochemical analysis of Paleoproterozoic metasedimentary and metavolcanic units in the Alutaguse region of northern Estonia, shedding light on the geodynamic evolution during the Svecofennian orogeny in eastern Fennoscandia ...
Juan David Solano-Acosta, Alvar Soesoo, Rutt Hints   +2 more
doaj   +1 more source

SEDIMENTOLOGICAL CONSIDERATIONS ON THE LITHOCHRONOSTRATIGRAPHIC DISCONTINUITY ESTABLISHED BETWEEN THE SANSIKWA SUB-GROUP AND THE MAYUMBIAN GROUP IN THE SECTOR BETWEEN MPETE AND NDWIZI (CENTRAL KONGO, DR CONGO) [PDF]

Geological Behavior
East of the Matadi square degree, the transition from the metasedimentary protoliths of the Mayumbian Group to the clayey-sandy deposits of the Sansikwa Subgroup recalls a similar sedimentological history but distinct in their paleoenvironmental ...
Mukeba C.L, Makutu M.A.J, Cibambula C.M.E, Ongendangenda T.A, Bokakandani M.E, Tuema L.O, Kabamba B.J.R, Muper S.C   +7 more
doaj   +1 more source

Oxygen and nitrogen isotopes as tracers of fluid activities in serpentinites and metasediments during subduction

, 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., Busigny, V., Philippot, Pascal, Philippot, P., Busigny, Vincent, Cartigny, Pierre, Cartigny, P., Scambelluri, Marco   +7 more
core   +3 more sources

The evolution of the Sesia Zone (Western Alps) from Carboniferous to Cretaceous: insights from zircon and allanite geochronology

Swiss Journal of Geosciences, 2020
Microscale dating of distinct domains in minerals that contain relics of multiple metamorphic events is a key tool to characterize the polyphase evolution of complex metamorphic terranes. Zircon and allanite from five metasediments and five metaintrusive
Alice Vho, Daniela Rubatto, Pierre Lanari, Daniele Regis   +3 more
doaj   +1 more source

Discovery of Mega‐Sheath Folds Flooring the Liwan Subbasin (South China Sea): Implications for the Rheology of Hyperextended Crust

Geochemistry, Geophysics, Geosystems, 2020
Sheath folds recognized on kilometer scale are rare and only described in salt tectonics in seismic data. Here, we present mega‐sheath folds spectacularly imaged in a 3‐D seismic survey in the seismic basement flooring the hyperextended Liwan subbasin in
C. Zhang, G. Manatschal, X. Pang, Z. Sun, J. Zheng, H. Li, L. Sun, J. Zhang, Y. Zhao   +8 more
doaj   +1 more source