Cathodoluminescence of quartz from sandstones; interpretation of the UV range by determination of trace element distributions and fluid-inclusion P-T-X properties in authigenic quartz

Abstract

Other| August 01, 1996 Cathodoluminescence of quartz from sandstones; interpretation of the UV range by determination of trace element distributions and fluid-inclusion P-T-X properties in authigenic quartz Christelle Demars; Christelle Demars CREGU, Vandoeuvre-les-Nancy, France Search for other works by this author on: GSW Google Scholar Maurice Pagel; Maurice Pagel Search for other works by this author on: GSW Google Scholar Etienne Deloule; Etienne Deloule Search for other works by this author on: GSW Google Scholar Philippe Blanc Philippe Blanc Search for other works by this author on: GSW Google Scholar American Mineralogist (1996) 81 (7-8): 891–901. https://doi.org/10.2138/am-1996-7-812 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Christelle Demars, Maurice Pagel, Etienne Deloule, Philippe Blanc; Cathodoluminescence of quartz from sandstones; interpretation of the UV range by determination of trace element distributions and fluid-inclusion P-T-X properties in authigenic quartz. American Mineralogist 1996;; 81 (7-8): 891–901. doi: https://doi.org/10.2138/am-1996-7-812 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyAmerican Mineralogist Search Advanced Search Abstract Quartz overgrowths from Keuper sandstones of the Paris basin were examined using cathodoluminescence (CL) microscopy and spectroscopy coupled with a scanning electron microscope (SEM). With the use of standard cold CL equipment, it was observed that the emission of authigenic quartz is much less intense than that of detrital quartz grains, but a reversal of intensity was observed with scanned CL in the 200-800 nm range. The main CL emission band of diagenetic quartz is at 330-340 nm in the UV range, with other bands in the visible range. The determination of trace element distributions in authigenic quartz by in situ analyses and by SIMS imagery reveals the correlation of the 330-340 nm emission band with the highest A1 and Li contents. The cathodoluminescence emission of diagenetic quartz in the UV range appears to be influenced by the coupled substitution of A1 and Li into the crystal. Two explanations are suggested: (1) Al, Li, or both serve as activators, and (2) the incorporation of Al and Li causes lattice defects that lead to an enhancement of the intrinsic luminescence. Trace element analyses and fluid-inclusion studies revealed that quartz overgrowths precipitated from a fluid that partially originated from an Li-enriched primary brine derived from eastern Triassic evaporites of the Paris basin. The specific CL emission band in the UV range can be linked to the diagenetic environment. The chemistry of the fluids appears to be the essential parameter, whereas precipitation temperatures do not influence the occurrence of such emissions. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not currently have access to this article.