The Zhob ophiolite is divided into Ali Khanzai, Omzha, and Naweoba blocks. geology comprises various lithological units including basalt–chert hyaloclastite mudstone units. consist of thick lava pelagic sediments. On the basis petrology geochemistry, lavas unit can be tholeiitic basalt, trachybasalt, basaltic andesite dacite, that more alkaline foidite, picrobasalt, tephrite-basanite. rocks hav...

Although the Emeishan Large Igneous Province (ELIP) has been thoroughly researched, role of ELIP in tectonics Songpan–Ganzi extensional basin eastern Tibetan Plateau long argued without any corroborated and robust evidence. We have investigated basalt succession Dashibao Formation along Xindianzi Xuecheng sections southeast margin Terrane (SGT). New SIMS zircon U-Pb ages geochemical features ar...

Samples of basalt were collected during the Rapid Response cruise to Loihi seamount from a breccia that was probably created by the July to August 1996 Loihi earthquake swarm, the largest swarm ever recorded from a Hawaiian volcano. Po–Pb dating of two fresh lava blocks from this breccia indicates that they were erupted during the first half of 1996, making this the first documented historical ...

Abstract The magmatic character of early subduction zone and arc development is unlike mature systems. Low-Ti-K tholeiitic basalts boninites dominate the Izu-Bonin-Mariana (IBM) system. Basalts recovered from Amami Sankaku Basin (ASB), underlying located west IBM’s oldest remnant arc, erupted at ~49 Ma. This was 3 million years after inception (51-52 Ma) represented by forearc basalt (FAB), tip...

Abstract The Rio Grande Rise in the western South Atlantic Ocean has been interpreted as either an oceanic plateau related to Tristan-Gough mantle plume, or a fragment of detached continental crust. Here we present new major and trace element data for volcanic rocks from eastern adjacent Jean Charcot Seamount Chain. older parts are comprised tholeiitic basalt with moderately enriched compositio...

Two fundamentally different types of silicic volcanic rocks formed during the Cenozoic of the western Cordillera of the United States. Large volumes of dacite and rhyolite, mostly ignimbrites, erupted in the Oligocene in what is now the Great Basin and contrast with rhyolites erupted along the Snake River Plain during the Late Cenozoic. The Great Basin dacites and rhyolites are generally calc-a...

Within southern Mali, the Syama belt constitutes a linear major structure-oriented N-S, which host several gold deposits (e.g., and Tabakoroni) prospect areas (e.g. Tellem). The Belt is formed by magmatic rocks (basalts, lamprophyres, andesites, dacites microgranites); sedimentary (shales) volcano-sedimentary (pyroclastics). are divided into two main volcanic series: tholeiitic affinity (basalt...