This study combines detailed geologic mapping, tephrochronology, U-Pb zircon dating, and published drill core data to evaluate the time transgressive 3-dimensional (thus 4-dimensional) structure evolution of two volcanoes on Hachijo-jima juvenile Izu-Bonin intra oceanic arc. The regional Ata-Torihama tephra (Ata-Th; 0.24 Ma) Kikai-Tozurahara (K-Tz; 0.095 from Kyushu are intercalated within volu...

Abstract Recognition of any intra-oceanic arc-trench system (IOAS) could provide invaluable information on the tectonic framework and geodynamic evolution vanished ocean basin. The Tanjianshan Complex mafic-ultramafic rocks along North Qaidam ultra-high pressure metamorphic belt in NW China record subduction process Proto-Tethyan Ocean. Four lithotectonic units, including island arc, ophiolite,...

The geodynamics and plate tectonics of the South China Sea (SCS)-Taiwan region since Miocene times are uncertain because former extent tectonic configuration subducted easternmost SCS along Manila trench is uncertain. Here we unravel regional kinematic context from main offshore constraints including published unfolding slab seismic tomography, which provides insight on restoring part SCS. We r...

The Grenada back-arc basin is located between the Aves Ridge, which hosted remnant Early Paleogene “Great Caribbean Arc,” and Eocene to Present Lesser Antilles Arc. Several earlier studies have proposed different modes of opening for this basin, including N-S E-W directions. main aim study constrain circumstances leading basin. Three combined wide-angle reflection seismic profiles were acquired...

This paper reports the first discovery of basic igneous rocks in Bairin Right Banner southeastern Inner Mongolia, China. To understand genesis and tectonic evolution these rocks, we have carried out geochronology geochemistry research on them. The results show that LA-ICP-MS zircon U-Pb concordant mean ages massive basalt, diabase, pillow basalt are 272.0 ± 2.8 Ma, 261.5 3.2 256.5 2.5 respectiv...

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...