The history of the quartz clusters in porpharitic rhyolite dike using cathodoluminescence
Other Title(s)
تاريخ تجمعات الكوارتز في قاطع الرايولايت البورفاريتي باستخدام تقنية الكاثودولومينيسنس
Joint Authors
Jabbudah, Sadiq Ahmad
al-Jin, Ibrahim Muhammad Suf
Khalifah, al-Munir Salih
Source
Issue
Vol. 8, Issue 19 (31 Dec. 2020), pp.368-392, 25 p.
Publisher
Publication Date
2020-12-31
Country of Publication
Libya
No. of Pages
25
Main Subjects
Earth Sciences, Water and Environment
Abstract EN
The origin of quartz glomerocrysts a distinctive petrographic feature of the rhyolite dike in Medicine Park, Oklahoma, was investigated using transmitted light and cathodoluminescence microscopy to determine if quartz glomerocrysts formed during quartz crystallization or during quartz dissolution.
Quartz glomerocrysts are typically comprised of two to six individual phenocrysts of quartz and commonly exhibit subhedral partially embayed crystal forms with very rare euhedral phenocrysts in both glomerocrysts and individual quartz phenocrysts.
The size range of the individual quartz phenocrysts are 0.08mm to 1.7mm while the size range is 0.08mm to 3.25mm for quartz glomerocrysts .
Cathodoluminescence revealed that individual quartz phenocrysts which comprise glomerocrysts showed abrupt truncation of internal compositional growth zonation along the shared resorbed crystal surfaces, demonstrating the quartz glomerocrysts formed after initiation of quartz dissolution.
The driving force behind quartz dissolution is consistent with decompression during magma ascent resulting in a decrease in the stability field for quartz due to the shift in the position of the coetectic in the system Q-Ab-Or-H2O.
Juxtaposition of dissolving quartz phenocrysts during magma ascent leads to the formation of glomerocrysts as a result of crystallization of the overlapping boundary layer melts that surround the dissolving quartz phenocrysts.
The common occurrence of glomerophyric quartz phenocrysts in granites, akin to those observed in the rhyolite dike may have also formed as a result of decompression dissolution, thus providing a textural record of magmatic ascent.
American Psychological Association (APA)
Jabbudah, Sadiq Ahmad& al-Jin, Ibrahim Muhammad Suf& Khalifah, al-Munir Salih. 2020. The history of the quartz clusters in porpharitic rhyolite dike using cathodoluminescence. Journal of Libyan Studies :،Vol. 8, no. 19, pp.368-392.
https://search.emarefa.net/detail/BIM-1333230
Modern Language Association (MLA)
Jabbudah, Sadiq Ahmad…[et al.]. The history of the quartz clusters in porpharitic rhyolite dike using cathodoluminescence. Journal of Libyan Studies : Vol. 8, no. 19 (Dec. 2020), pp.368-392.
https://search.emarefa.net/detail/BIM-1333230
American Medical Association (AMA)
Jabbudah, Sadiq Ahmad& al-Jin, Ibrahim Muhammad Suf& Khalifah, al-Munir Salih. The history of the quartz clusters in porpharitic rhyolite dike using cathodoluminescence. Journal of Libyan Studies :. 2020. Vol. 8, no. 19, pp.368-392.
https://search.emarefa.net/detail/BIM-1333230
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 389-390
Record ID
BIM-1333230