Introduction: The Lunar Magma Ocean (LMO) hypothesis holds that, early in its history the Moon was wholly or mostly molten [1,2]. Mafic minerals (olivine and pyroxene) crystallized first from the magma and sank to form the mantle, enriching the remaining magma in Fe and incompatible elements. Later, plagioclase floated in the dense Fe-rich magma [3,4], and concentrated at the Moon’s surface to ...

The North Tabriz Fault is seismologically an active fault with current right lateral strike-slip movements. Restricted mafic to intermediate Late Cretaceous igneous rocks are exposed along the North Tabriz Fault. Whole rock samples and clinopyroxene phenocrysts geochemistry were studied in order to characterize the petrogenesis of these mafic rocks and their possible relation to an oceanic crus...

The quartz dioritic Quottoon Igneous Complex (QIC) is a major Paleogene (65–56 Ma) magmatic body in northwestern British Columbia and southeastern Alaska that was emplaced along the Coast shear zone. The QIC contains two different igneous suites that provide information about source regions and magmatic processes. Heterogeneous suite I rocks (e.g., along Steamer Passage) have a pervasive solid-...

Fine scale heterogeneities in strontium isotope ratios, 40Ar-39Ar ages, and chemical com~sition have been determined for individual mineral grains and enclaves in the rhyolites of San Vincenzo, Italy. The rhyolites are peraluminous with phenocrysts of alkali feldspar, piagioclase, biotite, and cordierite and have previously been divided into two groups on the basis of whole rock major element c...

Irregular mare patches (IMPs), recently discovered on the Moon, are eruptions of magma lunar surface, and their origins still in question. While prior studies IMPs have mainly focused optical image analysis, this study, an analysis characteristics minerals is performed exemplary for first time. Modified Gaussian model (MGM) deconvolution was applied to infrared spectrum confirm properties mafic...

Owing to advances in microanalytical techniques over the last 15 years, there is a growing database on the volatile contents of subduction-related magmas as recorded in melt (glass) inclusions trapped in phenocrysts in volcanic rocks. Basaltic magmas from subduction zones show a wide range of water contents, ranging from as high as 6–8 to b0.5 wt.% H2O. Variations are related in some places to ...

with suggestions that fractionation of tholeiitic basalt in this pressure To model magmatic crystallization processes for mafic to intermediate range yields an alkalic basalt. Both trends may occur for natural compositions at high pressure, liquidus phase relations in the basalts depending on the Na2O content of the parental magma. forsterite–anorthite–diopside–silica (FADS) tetrahedron within ...