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 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...
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 کاملAn Automated Microscope Scanning Stage for Fission-track Dating
A microcomputer controlled scanning stage has been developed which greatly facilitates track counting. It has been designed specifically for the external detector method of fission-track dating, although the basic hardware could be used for a variety of different scanning requirements. With this system, the microscope stage is automatically controlled to move between corresponding points on the...
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ژورنال
عنوان ژورنال: Journal of Earth System Science
سال: 1981
ISSN: 0253-4126,0973-774X
DOI: 10.1007/bf03029217