Experiments were conducted to determine whether the rhyolites and basalts of the intraplate silicasaturated potassic suites could be genetically related through crystallization. Extreme crystallization (96–97%) of a high-MgO (10.62 wt%) olivine tholeiite from the Snake River Plain with an initial bulk water content of 0.4 wt% at a mid-crustal pressure of 4.3 kbar generated potassic rhyolitic li...

The surveys of natural gamma-emitting radionuclides in rocks and soils from the Ezine plutonic area were conducted during 2007. Direct dose measurement using a survey meter was carried out simultaneously. The present study, which is part of the survey, analysed the activity concentrations of U, Th and K in granitoid samples from all over the region by HPGe gamma spectrometry. The activity conce...

The Osnytsky block is a constituent part of the Osnytsky-Mikashevytsky volcano-plutonic belt. leading place in geological structure occupied by rock association, which includes number plutonic formations from gabbro to leucocratic granites (gabbro-diorite-granodiorite-granite association), formed Paleoproterozoic — 1,98—1,95 Ga. results lead-lead isotope dating titanites diorites, opened RPZ-5 ...

The Avaj Oligocene volcanic – plutonic complex is part of extensive Cenozoic magmatic activity within the Urumieh-Dokhtar arc Iran. We use whole rock geochemistry, mineral compositions and crystal size distributions (CSD) in a suite co-genetic basalt, basaltic andesite gabbro to determine their petrogenesis. Ca-rich cores plagioclase (An79-86) overlap empirically modelled compositions, indicati...

To demonstrate the ability of Raman spectroscopy to determine the mineralogical character of a rock that originated on Mars, we analyzed a small slab of “normal Zagami” by point analyses and multipoint scans using laboratory spectrometers. Spectra of clinopyroxenes were dominant; their compositions were estimated from a calibration of Raman peak positions with Mg/(Mg+Fe) based on lunar pyroxene...

The area of Esfordi-Zarigan in Central Iran is located in Bafq metallogenic province where most the rock units belong to Precambrian, Infracambrian and Cambrian periods. Although the sedimentary and volcanic rocks are widely distributed, this research is mainly focused on petrogenesis of plutonic rocks. From stratigraphic point of view sedimentary and volcanic rocks can be classified in five ma...

The Takomkane pro ject is a multiyear bed rock map ping pro gram ini ti ated by the Brit ish Co lum bia Geo log i cal Sur vey dur ing the 2005 field sea son. This pro gram is fo cused on Me so zoic arc vol ca nic and plutonic rocks of the Quesnel Terrane in the vi cin ity of the Takomkane batholith, which strad dles the Bonaparte Lake (NTS 092P) and Quesnel Lake (NTS 093A) map sheets (Fig 1). P...