Fission track studies on hornblende, biotite and phlogopite from Sweden
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چکیده
منابع مشابه
Cooling history and exhumation of the nepheline syenites, NW Iran: constraints from apatite fission track
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...
متن کاملDifferent shapes of tracks in phlogopite, biotite and soda lime glass
Etched track opening geometries in Biotite, Phlogopite and soda-lime glass irradiated with swift heavy ions [197Au(11.64 MeV/n), 136Xe(11.56 MeV/n), 58Ni(11.56 MeV/n)] at different angle of incidence have been studied using appropriate chemical etching technique. Different geometries (Hexagonal, irregular polygon, triangular in case of Biotite and Phlogopite, and circular & elliptical in case o...
متن کاملBiotite and Hornblende Composition Used to Investigate the Nature and Thermobarometry of Pichagchi Pluton, Northwest Sanandaj-Sirjan Metamorphic Belt, Iran
Pichagchi pluton is situated in the northeastern part of the Soursat complex in Sanandaj-Sirjan metamorphic belt of Iran. The pluton with the age of 74.20 Ma is composed mainly granodiorite, diorite, and tonalite in which mafic minerals are biotite and amphibole. In this study, composition of minerals used to describe the nature of the granitic magma and estimate the pressure and temperature at...
متن کامل45. Fission Track Chronology of Basaltic Glasses from Dsdp
Natural basaltic glasses recovered from Leg 37 of the Deep Sea Drilling Project have been dated by fission track methods. Close agreement in results indicates that the age of the oceanic crust drilled at Site 332 is 3.67 ±0.40 m.y. The age of the crust at Site 335 is less well defined, the average of the three dates obtained from this site being 14.45 ±2.27 m.y.
متن کاملDecomposition of Fission - Track Grain - Age Distributions
The external-detector method of fission-track (FT) dat ing is capable of providing FT ages for individual mineral grains. As a result, tliis method when applied to dating detrital zircons in unreset sandstone samples has much potential for resolving the depositional age and provenance of the samples. One problem is that individual FT grain ages for detrital zircons usually have fairly low prec...
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ژورنال
عنوان ژورنال: Bulletin of the Geological Society of Finland
سال: 1972
ISSN: 1799-4632,0367-5211
DOI: 10.17741/bgsf/44.1.005