SUMMARY Rapid onset of subduction tectonics across the western Pacific convergent margins in early Eocene was followed by a slower phase margin growth proto Tonga-Kermadec system north Zealandia during middle to tectonic adjustment. We present new age constraints from International Ocean Discovery Program Expedition 371 borehole data on deformation events northern Zealandian sediments that docu...

The Algerian continental margin in the western Mediterranean formed as a back-arc basin and is today reactivated by convergence between African Eurasian plates. It one of very rare examples passive margins undergoing inversion expressed moderate seismicity possibly giving way for future subduction. With objective to better know deep structure its associated basin, origin study mechanism reactiv...

the lut block in eastern iran is a micro-continental block within the convergent orogen between the arabian, eurasian and indian plates. large areas of the north-central, eastern, and western lut block are covered by volcanic rocks of paleogene, neogene and quaternary age.  peak volcanic activity took place in the north-central part of the lut block during the eocene, and then dramatically decr...

tertiary intrusive granitoids within the lut block in the khorasan razavi and south khorasan provinces are mainly sub-volcanic with porphyry texture and their composition varies from granite to diorite but monzonite is dominant. with the exception of hired, these are classified as belonging to the magnetite-series of i-type granitoids. chemically, these rocks are meta-aluminous. those with mine...

This section describes the boundaries and the main physical and socioeconomic characteristics of the region in order to define the area considered in the regional GIWA assessment and to provide sufficient background information to establish the context within which the assessment was conducted. Brazil Current, GIWA region 39, is a tropical/sub-tropical ocean margin governed by western boundary ...

a r t i c l e i n f o Keywords: Lithium isotopes A-type granite Mafic enclave Continental crust Lithium concentrations and isotopic compositions of 39 A-type granites and mafic enclaves from 11 plutons in Northeast China and the North China craton are used to constrain their genesis and to characterize further the average composition of the continental crust. Lithium concentrations (2.8 to 80 p...

The Lut block in eastern Iran is a micro-continental block within the convergent orogen between the Arabian, Eurasian and Indian plates. Large areas of the north-central, eastern, and western Lut block are covered by volcanic rocks of Paleogene, Neogene and Quaternary age.  Peak volcanic activity took place in the north-central part of the Lut block during the Eocene, and then dramatically decr...