New geochemical data for Pleistocene magmatic rocks from the Surigao peninsula, eastern Mindanao, the Philippines, demonstrate typical adakitic traits, including elevation of Sr /Y and depletion of the heavy rare earth elements. Sr / Sr and Nd / Nd ratios of the adakites do not support melting of the subducted Philippine Sea Plate but resemble Pliocene arc lavas generated in the same subduction...

West Rota Volcano (WRV) is a recently discovered extinct submarine volcano in the southern Mariana Arc. It is large (25 km diameter base), shallow (up to 300 m below sealevel), and contains a large caldera (6 ¥ 10 km, with up to 1 km relief). The WRV lies near the northern termination of a major NNE-trending normal fault. This and a second, parallel fault just west of the volcano separate uplif...

A comprehensive apatite fission-track (AFT) study of the passive margin of western peninsular India between 12‡ and 16‡N is used to reconstruct the denudation chronology of the continental hinterland. In common with other rifted margins, the morphology is characterised by a low-lying coastal plateau separated from an elevated inland plateau by an erosionally controlled escarpment (Western Ghats...

Hf isotope ratios measured in igneous zircon are controlled by magmatic source, which may be linked to tectonic setting. Over the 200-500 Myr periodicity of the supercontinent cycle - the principal geological phenomenon controlling prevailing global tectonic style - juvenile Hf signals, i.e. most radiogenic, are typically measured in zircon from granites formed in arc settings (crustal growth),...

This paper applies magnetic fabric analyses to plutons of the East Pacific continental arc. Continental arc magmatism is strongly episodic, with voluminous granitic magma addition occurring during discrete high-flux events (‘flare-ups’). The cause these flare-ups debated, variously invoking tectonic, mantle, or crustal controls. To understand how syn-magmatic strain history changes a flare-up, ...

1- Department of Bacteriology and Virology, Faculty Medicine, Shiraz University Medical Sciences, Shiraz, Iran 2- Biochemistry, Kerman Kerman, 3- 4- , [email protected]

Abstract The 1,500-km-long Banatitic Magmatic and Metallogenetic Belt (BMMB) of Romania, Serbia and Bulgaria is a complex calc-alkaline magmatic arc of Late Cretaceous age. It hosts a variety of magmatic-hydrothermal Cu, Au, Mo, Zn, Pb and Fe deposits, including Europe’s only world-class porphyry-copper deposits. Regional metallogeny can be linked to subduction of the Vardar Ocean during the La...

Corresponding Author: Dr. Arsham Borumand Saeid, Department of Mathematics, Shahid Bahonar University of Kerman, Kerman, Iran, email: [email protected] 1446 Ideal Theory of BCH-Algebras 1A. Borumand Saeid, 2A. Namdar and 3R.A. Borzooei Department of Mathematics, Shahid Bahonar University of Kerman, Kerman, Iran Department of Mathematics, Islamic Azad University Zarin Dasht Branch, Iran Depar...