Introduction: Many questions regarding the petrogenesis of mare basalts remain unresolved. Trace element and isotope geochemists tend to view the range of mare basalt compositional groups as independent primary magmas and develop mantle melting models to explain the compositional diversity [e.g. 1, 2, 3]. On the other hand, petrologists view the mare basalt suites as non-primary and suggest tha...

The Cenozoic Mormon Mountain Volcanic Field (MMVF) of northern Arizona is situated in the transition zone between the Basin and Range and the Colorado Plateau. It is composed of alkalic to sub-alkalic basalts and calcalkalic andesites, dacites, and rhyodacites. Despite their spatial and temporal association, the basalts and the calcalkalic suite do not seem to be co-genetic. The petrogenesis of...

The occurrence of carbonatites in oceanic settings is very rare if compared with their continental counterpart, having been reported only Cape Verde and Canary Islands. This paper provides an overview the main geochemical characteristics carbonatites, around which many debates still exist regarding petrogenesis. We present new data on trace elements minerals whole-rock, together first noble gas...

Introduction: We have conducted melting experiments on liquids predicted to be in equilibrium with ureilites to explore the phase relations of the smelting reaction and understand the relations between ureilites. Correlations of modal mineralogy, mineral chemistry and texture are consistent with smelting as a major process involved in ureilite petrogenesis [1]. Although ureilites resemble igneo...

We report 230Th-238U disequilibrium data on mid-ocean ridge basalts recovered 5 to 40 kilometers off the ridge axis near 9 degrees 30'N of the East Pacific Rise. These data indicate near-symmetrical eruptions of normal mid-ocean ridge basalts (NMORBs) and incompatible element-enriched mid-ocean ridge basalts (EMORBs) as far as 20 kilometers off axis. Our results suggest large-scale subsurface l...

EDITORIAL article Front. Earth Sci., 21 January 2021 | https://doi.org/10.3389/feart.2020.637729

biotite samples from different units of boroujerd granitoid complex (bgc) of the sanandaj-sirjan zone, western iran, have beenanalyzed by electron microprobe for major elements. biotite analyses from three units of quartzdiorite, granodiorite and monzograniteof bgc have their own distinct non-overlapping compositional fields in the annite – siderophyllite – phlogopite – eastonitequadrilateral (...

What olivine, the neglected mineral, tells us about kimberlite petrogenesis N. T. Arndt, A. M. Boullier, J. P. Clement, M. Dubois, and D. Schissel OSUG, Univ. de Grenoble, BP 53, Grenoble cedex 38401, France U.F.R. des Sciences de la Terre, UMR 8110 Processus et Bilans des Domaines Sédimentaires, 59655 Villneuve d’Ascq, France BHP Billiton World Exploration, Inc., 1400-1111 West Georgia Street,...

salafchegan-khorhe volcanic rocks are exposed within urumieh-dokhtar magmatic belt. different kinds of volcanic and subvolcanic rocks of calc-alkaline to alkaline character have been reported throughout this magmatic belt. since, isotopic investigations are very useful for detection of magma petrogenesis and because no isotopic studies have been done in this area, so a geochemical and isotopic ...