The Kab Amiri area in the Central Eastern Desert (CED) of Egypt comprises ophiolitic rocks, island arc metasediments, and granitic rocks. This study deals with petrography geochemistry rocks to understand their petrogenesis geodynamic evolution CED belt. ophiolite is dismembered, comprising serpentinites metabasalt (spilite). Serpentinites have low contents Al2O3 (1.14 wt%) CaO (0.65 wt%), sugg...

The Eastern Andean Metamorphic Complex at Península La Carmela (48°50’S) consists of quartz-rich metaturbiditic sequences with tectonic slices pillow metabasalt bodies deformed under low-grade metamorphic conditions. Previous and new detrital zircon U–Pb geochronological data from metasandstones indicate a preferred early Carboniferous maximum depositional age the protolith, interpreted younges...

Soil Science Society of America JournalVolume 87, Issue 3 COVER IMAGEFree Access Cover Image, Volume First published: 15 May 2023 https://doi.org/10.1002/saj2.20445AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text full-text accessPlease review our Terms and Conditions Use check box below share version article.I have read accept t...

The Leech River Shear Zone (LRSZ) on southern Vancouver Island separates the metasedimentary schists of Complex (LRC) from accreted oceanic plateau Siletz-Crescent terrane. juxtaposition these rock units suggests a possible origin as subduction plate boundary but tectonic context LRSZ has yet to be fully established. We present field, microstructural, petrological, and geochronological observat...

Abstract Aseismic megathrust slip downdip of the seismogenic zone is accommodated by either steady creep or episodic slow events (SSEs). However, geological conditions defining rheology remain elusive. We examined exhumed subduction mélanges on Kyushu, Japan, which deformed at ∼370–500°C under greenschist to epidote‐amphibolite facies conditions, comparable warm‐slab environments. The recorded ...

Geophysical observations indicate that patches of localized fracturing occur within otherwise viscous regions subduction plate boundaries. These place uncertainty on the possible down-dip extent seismogenic zone, and as a result maximum magnitude thrust earthquakes. However, processes controlling where how occurs shear zones are unclear. We examined three exposures exhumed boundary Kyushu, Japa...

The Tianshui-Sunjiaxia area is located in the connection zone of West Qinling Orogen and North Qilian Orogen, which could provide great insights into amalgamation processes between northern southern blocks China. Three subduction- rift-related rocks gneissic granite from arc-interarc belt (NQAI) metabasalt back-arc basin (NQBA) are distinguished across zone. was generated by melts older crustal...

metagabbro, metadiabase and metabasalt of the chah palang and me'raji mountains associated with lower paleozoic metamorphites are situated in the south of arousan. metabasites of these areas are relatively similar in terms of mineralogy and geochemical characteristics. rock-forming minerals of the me'raji metabasites are feldspar, amphibole, biotite, sphene, epidote, chlorite ± calcite. metagab...

This study presents the first geochemical, mineralogical and petrological data on mafic ultramafic rocks of Texenna (Lesser Kabylia, north-eastern Algeria) with aim constraining their tectonic setting in context Maghrebide belt. The magmatic-sedimentary complex comprises serpentinite, metabasites (metagabbro, metadolerite metabasalt pillow-lava structures), oceanic metasediments (radiolarite ca...