Marapi in Sumatra is characterized by frequent short-lived explosions and small eruptions (Volcanic Explosivity Index 1–2) the past 250 years, volcano has erupted >60 times. Recent volcanic bombs presence of broadband seismic stations lead us to reconstruct plumbing system through an interdisciplinary study. A petrologic study summit uses pyroxene, plagioclase glass compositions obtain pressure...

The Eoarchean Isua supracrustal belt (ISB) has been interpreted as one of the earliest records subduction processes, leading to conclusion that a plate tectonic geodynamic system was likely operating since early Archean. However, proposed models remain difficult evaluate our understanding metamorphic and structural evolution remains fragmentary. Here, we present study rocks ISB. We used petrogr...

The study area is located about 110 kilometers southeast of Mashhad and approximately 40 kilometers southeast of Fariman. The area is considered to be a part of the central Iran zone. It includes metamorphic rocks with different protoliths consisting of pelitic, carbonate and quartz - feldspathic rocks. The metamorphism in the study area is considered to be a contact regional metamorphism with ...

Three samples of meta-acidic rocks with pre-Alpine metamorphic relicts from the Sesia-Lanzo Zone eclogitic continental crust were investigated using stepwise controlled elemental maps by means Quantitative X-ray Maps Analyzer (Q-XRMA). Samples chosen aim analysing reacting zones along boundaries between and Alpine mineral phases, which developed in low chemically reactive systems. The quantitat...

Late Neoproterozoic-Early Cambrian schists have been occurred in southwest of Zanjan city from the Soltanieh belt. The Soltanieh belt in northwest of Iran is uplifted basement of Precambrian-Paleozoic in main central Iran zone and includes outcrops of Precambrian, Paleozoic and Mesozoic Formations. Late Neoproterozoic-Early Cambrian schists, the oldest stratigraphy unit in the region, consist o...

The East Sulawesi Ophiolite, one of the three largest ophiolites in world, contains important podiform chromitites. However, origin these chromite deposits is not well constrained. Here, we present detailed mineralogy and situ chemistry solid inclusions within for chromitites from Kabaena Island, Southeast Sulawesi. Chromite grains have low TiO2 (0.17–0.27 wt%) Al2O3 (13.4–15.1 contents high Cr...