Growth related zonations in authigenic and hydrothermal quartz characterized by SIMS-, EPMA-, SEM-CL- and SEM-CC-imaging

Lehmann, Katja; Berger, Alfons; Götte, Thomas; Ramseyer, Karl; Wiedenbeck, Michael

doi:10.1180/minmag.2009.073.4.633

Cited by 53 publications

(24 citation statements)

References 27 publications

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“…CL studies have shown that a bright blue CL color at 400nm is characteristic of hydrothermal quartz, while metamorphic quartz usually has a red-brown CL color around 600nm (Götze et al, 2001). At an atomic scale, although it is still a point of debate (Lehmann et al, 2009), the luminescence center associated with the evanescent CL blue color could be the Al 3+ structural defect replacing Si 4+ in quartz lattice (Götze et al, 2001). Our study confirms the close correspondence between aluminum concentration and the evanescent blue CL color.…”

Section: Aluminum Concentration and Cathodoluminescencesupporting

confidence: 84%

Fluid circulation in the depths of accretionary prisms: an example of the Shimanto Belt, Kyushu, Japan

et al. 2015

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International audienceAccretionary prisms constitute ideal targets to study fluid circulation and fluid-rock interactions at depths beyond the reach of active margin deep drilling. The highest-grade rocks from the Shimanto Belt on Kyushu were buried under 3-5 kbars at ~ 300°C (Toriumi and Teruya, 1988). They contain abundant quartz veins, formed throughout burial and exhumation and variably affected by brittle and ductile deformation.Cathodoluminescence (CL) reveals the existence of two distinct types of quartz, characterized by a blue and brown color, respectively. CL-blue quartz fills macro-veins (width ≥ 10μm), while CL-brown quartz is present in micro-veins (width ~ 1 − 10μm) and ductilely recrystallized domains. On the basis of microstructures, the fluids associated with the CL-blue and CL-brown quartz are interpreted as “external” and “local”, respectively. Quartz growth rims of alternating CL colors as well as mutually cross-cutting veins show that the two fluids cyclically wetted the host rock.From fluid inclusions analysis, the fluid associated with CL-blue quartz has a salinity similar to seawater, while the fluid associated with CL-brown quartz is less saline. In addition, CL-blue quartz is richer in aluminum than the CL-brown one. In contrast to the salinity/aluminum signature, the δ18O isotopic signature of both quartz types is similar and buffered by host rock. The difference between the preservation of the salinity signature of the fluid and the loss of its δ18O signature is explained by quicker exchange kinetics and larger host rock buffering capacity for isotopic reequilibration.The “local” fluid, associated with CL-brown quartz, reflects the dilution of pore water by the pure water produced by prograde dehydration reactions of clay minerals. The “external” fluid associated with CL-blue quartz is interpreted as seawater or pore water from shallow (depth<1-2 km below seafloor) sediments. We propose that downward percolation of shallow water to depths ~ 10km is a transient process associated with mega-earthquakes

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Section: Aluminum Concentration and Cathodoluminescencesupporting

confidence: 84%

Fluid circulation in the depths of accretionary prisms: an example of the Shimanto Belt, Kyushu, Japan

et al. 2015

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“…The great interest in luminescence studies of quartz is due to the fact that information not available by other analytical methods can be obtained. For instance, cathodoluminescence (CL) can be used to reveal internal textures, growth zoning, secondary alteration or different quartz generations, which cannot be discerned by optical or electron microscopy (e.g., Zinkernagel 1978;Ramseyer et al 1988;Owen 1988;Ramseyer and Mullis 1990;Watt et al 1997;Müller 2000;Götze et al 2001a; Van den Kerkhof et al 2004;Rusk et al 2006Rusk et al , 2008Krickl et al 2008;Götze 2009;Müller et al 2009a;Jourdan et al 2009aJourdan et al , 2009bLehmann et al 2009). In addition, CL is an effective method for spatially resolved analysis of extrinsic or intrinsic point defects in quartz by spectral measurements.…”

Section: Introductionmentioning

confidence: 98%

Origin and significance of the yellow cathodoluminescence (CL) of quartz

Götze

Pan

Stevens‐Kalceff

et al. 2015

American Mineralogist

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The origin of yellow cathodoluminescence (CL) in quartz has been investigated by a combination of CL microscopy and spectroscopy, electron paramagnetic resonance (EPR) spectroscopy, and spatially resolved trace-element analysis by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). The study shows that the appearance of a ~570 nm (2.17 eV) emission band can be attributed to high oxygen deficiency and local structural disorder in quartz. A proposed luminescence center model implies self-trapped exciton (STE) emission from localized amorphized regions in quartz. Although the high-intensity emission at 570 nm is in general consistent with high concentrations of E′ 1 defects detected by EPR spectroscopy, CL studies with different electron beam parameters and annealing experiments up to 600 °C show a temperature and irradiation dependence of the luminescence related defects excluding the role of E′ 1 centers as direct luminescence activators for the 570 nm emission. The evaluation of geochemical data shows that quartz with yellow CL occurs in low-temperature hydrothermal environment (mostly <250 °C) and is related to fast crystallization in an environment with oxygen deficiency.

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“…For example, hydrothermal "vein" quartz associated with various types of ore deposits often has distinctive ranges of Ti, Al, and other elements reflecting specific compositions and temperatures of associated mineralizing or metamorphic fluids~Holness & Watt, 2001;Monecke et al, 2002;Müller et al, 2003aMüller et al, , 2003bMüller et al, , 2010Götze et al, 2004;Landtwing & Pettke, 2005;Rusk et al, 2006Rusk et al, , 2008Rusk et al, , 2011Lehmann et al, 2009!. Ti contents in metamorphic and igneous quartz samples also display significant ranges and vary with inferred crystallization temperature or other factors~Suttner & Leininger, 1972;Watt et al, 1997;Müller et al, 2002Müller et al, , 2003aGötze et al, 2005;Student et al, 2006;Sato & Santosh, 2007;Wark et al, 2007;Wiebe et al, 2007;Leeman & Lee, 2008;Shane et al, 2008;Campbell et al, 2009;Kohn & Northrup, 2009;Larsen et al, 2009;Spear & Wark, 2009;Storm & Spear, 2009;Vazquez et al, 2009;Girard & Stix, 2010;Huang & Audétat, 2012;Matthews et al, 2012!.…”

Section: Introductionmentioning

confidence: 99%

A Study of Cathodoluminescence and Trace Element Compositional Zoning in Natural Quartz from Volcanic Rocks: Mapping Titanium Content in Quartz

et al. 2012

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Abstract:This article concerns application of cathodoluminescence~CL! spectroscopy to volcanic quartz and its utility in assessing variation in trace quantities of Ti within individual crystals. CL spectroscopy provides useful details of intragrain compositional variability and structure but generally limited quantitative information on element abundances. Microbeam analysis can provide such information but is time-consuming and costly, particularly if large numbers of analyses are required. To maximize advantages of both approaches, natural and synthetic quartz crystals were studied using high-resolution hyperspectral CL imaging~1.2-5.0 eV range! combined with analysis via laser ablation inductively coupled plasma mass spectrometry~LA-ICPMS!. Spectral intensities can be deconvolved into three principal contributions~1.93, 2.19, and 2.72 eV!, for which intensity of the latter peak was found to correlate directly with Ti concentration. Quantitative maps of Ti variation can be produced by calibration of the CL spectral data against relatively few analytical points. Such maps provide useful information concerning intragrain zoning or heterogeneity of Ti contents with the sensitivity of LA-ICPMS analysis and spatial resolution of electron microprobe analysis.

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Growth related zonations in authigenic and hydrothermal quartz characterized by SIMS-, EPMA-, SEM-CL- and SEM-CC-imaging

Cited by 53 publications

References 27 publications

Fluid circulation in the depths of accretionary prisms: an example of the Shimanto Belt, Kyushu, Japan

Fluid circulation in the depths of accretionary prisms: an example of the Shimanto Belt, Kyushu, Japan

Origin and significance of the yellow cathodoluminescence (CL) of quartz

A Study of Cathodoluminescence and Trace Element Compositional Zoning in Natural Quartz from Volcanic Rocks: Mapping Titanium Content in Quartz

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