Thermal history and apatite fission-track ages were determined for the Kaleybar, Razgah and Bozqush alkaline intrusions which display Eocene-Oligocene stratigraphic age. These subduction-related intrusions are located in the Alborz-Azarbaijan magmatic belt which is characterized by a Paleogene magmatic flare-up associated with extensional/transtensional tectonism. The mean of Uranium content an...

The ~1.08 Ga anorogenic, A-type Pikes Peak batholith (Front Range, central Colorado) is dominated by coarsegrained, biotite±amphibole syenogranites and minor monzogranites, collectively referred to as Pikes Peak granite (PPG). The batholith is also host to numerous small, late-stage plutons that have been subdivided into two groups (e.g. Wobus, 1976. Studies in Colorado Field Geology, Colorado ...

We present airborne magnetic and radiometric characteristics of some igneous suites from the Ponta Grossa Arch Alkaline Province (southern Brazil), namely Bairro da Cruz, Banhadão, Barra do Itapirapuã, Mato Preto Tunas complexes, Teixeira Phonolite, Itapirapuã Nepheline syenite, José Fernandes Gabbro. applied susceptibility 3D inversions using total anomaly data together with its analytic signa...

The presence of heavy radioactive minerals in the studied granitoids from which Wadi sediments leads to study exposure emitted gamma rays terrestrial radionuclides, such as 238U, 232Th, and 40K. geological revealed that derived surrounding granitoids, syenogranite, alkali feldspar granite, quartz syenite. mineral analysis confirmed were enriched with minerals, uranothorite well monazite, zircon...

The sulfur isotope geochemistry of the Khibina and Lovozero agpaitic massifs provides an opportunity to understand role plume-lithosphere interaction processes responsible for Paleozoic alkaline igneous activity in north-eastern part Fennoscandian Shield. stable ?S analysis using triple collector ratio mass spectrometer (IRMS) has been carried out on pentlandite, chalcopyrite pyrite from nephel...