Exceptional exposures of igneous intrusions of the Henry Mountains of southern Utah allow for the detailed study of three-dimensional pluton geometries as well as igneous emplacement and assembly processes. Examination of the geometry, fabric, and wallrock structures of relatively small intrusions (<3 km map-view diameter) suggests that several plutons in the region (Maiden Creek sill, Trachyte...

the area is located 20 km northwest of kashmar and about 4 km of kalateh taimour in khorasan razavi province. the study area is part of tertiary volcanic-plutonic belt north of daruneh fault and its situation in tectonic inliers between two important active faults, doruneh and taknar. volcanic rocks are mainly intermediate to acid pyroclastic type. they formed during early tertiary. the volcani...

this paper presents the new geochemical isotopes sr and nd, and the mineralization data for the south neyshabour volcanic rocks located in ne iran. based on the chemical classifications, the studied rocks are basaltic trachy andesite, trachy andesite, trachyte, and trachy dacite in composition. all the analyzed volcanic rocks display enrichment in light rare earth elements (lree) relative to th...

Fluorine, chlorine, zinc, niobium, zirconium, yttrium, and rubidium have been determined on fifteen obsidians from Eburru volcano (Kenya Rift Valley), spanning the range from pantelleritic trachyte to pantellerite. All pairs of elements show positive correlation coefficients, ranging between o'769 and 0"998, but with most values better than o'9oo. In spite of some very high correlations, only t...

This paper presents the new geochemical isotopes Sr and Nd, and the mineralization data for the south Neyshabour volcanic rocks located in NE Iran. Based on the chemical classifications, the studied rocks are basaltic trachy andesite, trachy andesite, trachyte, and trachy dacite in composition. All the analyzed volcanic rocks display enrichment in light rare earth elements (LREE) relative to th...

Due to the increasing demand for conventional sources of potassium (K) and their inaccessibility by African countries, K-rich igneous rocks are increasingly studied as potential alternative sources. In this study, six potassic (syenites trachytes) from Tamazeght, Jbel Boho, Ait Saoun, El Glo’a regions (Morocco) were sampled characterized. Then they hydrothermally treated enhance K release use f...

sorkheh-dizaj apatite-iron oxide deposit is located 32 km southeast of zanjan. the area is situated within the tarom subzone of western alborz-azarbaijan structural zone. the oldest units at the sorkheh-dizaj area are eocene trachyte, trachyandesite, olivine basalt and volcanoclastic brecciate tuff and lapilli tuff which intruded by a quartz-monzonite, monzonite and granite subvolcanic pluton o...

Abstract Eastern Australia encompasses the longest track (~2000 km) of age-progressive continental volcanoes on Earth. These so-called ‘central volcanoes’ are shield considered as surficial expressions Cenozoic mantle plume activity under northward moving Australian continent. Here, we investigate three central located in southern, younger part volcanic (Ebor, Nandewar, and Canobolas) with aim ...