Abstract
We focus a new application of positron annihilation lifetime spectroscopy and Doppler broadening techniques at the annihilation sites have been applied on some basaltic rocks from inactive volcano related to Sana’a-Amrana volcanic Field (SAVF). A brief geologic set up and the main petrographic signature of this inactive volcano are given. To gain an insight into geological environment, open nanospaces in the well-characterized basaltic rocks were investigated by positron annihilation spectroscopy. The analysis of the lifetime spectra yielded two lifetime components. The olivine basalt samples contain less mono- vacancies than those found in the trachybasalt and vesicular basalt samples. The overall defect (vacancy) concentration and its variation in the samples were estimated using the mean positron lifetime (τm). The Doppler broadening parameters (S and W-Parameters) were measured. A little variation of the S-parameter values has been observed for all the studied samples indicating that the valance electron contribution to annihilation is not significant.
Highlights
Yemen Volcanic Group (YVG) includes two major categories; Tertiary Volcanics and Qaternary Volcanics [1,2,3] ranging in age from Oligocene to Plio-Qaternary [3]
The studied samples of basalts collected from Hemat Madam Volcano (HMV) is a part Sana'a-Amran Volcanic Field (SAVF) represent a natural material of multi-components, not a single compound, comprising specific chemical composition for each component
The vesicular basalt represents the final stage of volcanic eruption; it is mostly used as an excellent building stone in many habitats of Yemen and Saudi Arabia, due to its very high durability
Summary
Yemen Volcanic Group (YVG) includes two major categories; Tertiary Volcanics and Qaternary Volcanics [1,2,3] ranging in age from Oligocene to Plio-Qaternary [3] There are many occurrences of Plio-Qaternary volcanics in Sana’a and along Sana’aAmran road giving rise to much more inactive volcanoes ( ͂800 Km2) that called Sana’a-Amran Volcanic Field (SAVF) (Fig. 1). This volcanic field is characterized by scoriaceous basalt [3,4]. It covers about 1.2 km with altitude about 2366 m (a.s.l.)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
