Optical microscope-cathodoluminescence (OM–CL) imaging as a powerful tool to reveal internal textures of minerals

Götze, Jens; Schertl, Hans‐Peter; Neuser, Rolf D.; Kempe, Ulf; Hanchar, John M.

doi:10.1007/s00710-012-0256-0

Cited by 61 publications

(27 citation statements)

References 102 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An example of zircon demonstrated that PL intensity maps of REE 3+ may visualise the internal texture of zircon single-crystals (growth and sector zoning). Commonly, CL images are used to visualise internal textures of zircon (e.g., Vavra, 1990;Hanchar and Miller, 1993;Hanchar and Rudnick, 1995;Rakovan and Reeder, 1996; Götze, 2000Götze, , 2002Hoskin and Black, 2000;Rubatto and Gebauer, 2000;Corfu et al, 2003;Götze et al, 2013). They provide valuable information on primary formation and post-growth history.…”

Section: Discussionmentioning

confidence: 99%

Laser-induced REE3+ photoluminescence of selected accessory minerals — An “advantageous artefact” in Raman spectroscopy

et al. 2015

View full text Add to dashboard Cite

Keywords:Zircon Xenotime Monazite Titanite Laser-induced REE photoluminescence Raman artefact Laser-induced photoluminescence of trivalent rare-earth elements (REEs), which is obtained as analytical artefacts in Raman spectra of selected accessory minerals, was studied. Spectra of natural titanite, monazite-(Ce), xenotime-(Y), and zircon samples from various geological environments were compared with emission spectra of synthetic, flux-grown analogues doped with REEs. The latter is of great importance to identify potentially mistakable bands as either Raman or PL signal, and to assign them to certain REE centres. In the samples investigated, various REE centres are excited selectively using 473, 514, 532, 633, and 785 nm laser excitation. Their assignment was verified by photoluminescence-excitation experiments. Luminescence spectral patterns of zircon and titanite vary in dependence of trace-REE concentrations, hence reflecting geochemical growth conditions. "REE artefacts" in Raman spectra of accessory minerals may be used as fingerprint tool for mineral phaseidentification. The distribution of REE emission-intensities, revealed by hyperspectral mapping, opens up the opportunity to visualise mineral textures, complementary to cathodoluminescence imaging-techniques.

show abstract

Section: Discussionmentioning

confidence: 99%

Laser-induced REE3+ photoluminescence of selected accessory minerals — An “advantageous artefact” in Raman spectroscopy

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Therefore, the CL approach is known to facilitate the deciphering of mineral internal textures and is becoming increasingly attractive as a means for unraveling the metamorphic history of rocks. [21,30,[36][37][38] A comprehensive review of different electron backscatter diffraction (EBSD) applications in petrology is given by Prior et al [39] The study of microtextures in UHPM minerals by the EBSD approach has become widespread only recently and is commonly employed to reconstruct the deformation mechanisms during the UHPM events. Beane and Field [40] used EBSD to investigate kyanite porphyroblasts in UHPM whiteschists from the Kulet region (Kokchetav massif).…”

Section: Introductionmentioning

confidence: 99%

“…The obtained data testified to the influence of host zircon radiation damage on the diamond main Raman peak (1,332 cm -1 ), causing its broadening, downshifting, and decrease in intensity, [21] whereas 2-D Raman mapping of zircons revealed the broadening, downshifting, and decrease in intensity of the zircon 1,008 cm -1 peak in more metamictized U-rich cores. [21] Götze et al [38] convincingly showed that the combination of CL imaging with electron microprobe analysis and Raman spectroscopic technique affords a significant body of additional information on growth textures, alteration, exsolution features, and other important textural peculiarities of minerals. Müller et al [42] characterized six kyanite grains in metamorphic segregations derived from Al-rich metasediments and metamorphosed Al-Si-rich alteration zones by CL and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS).…”

Section: Introductionmentioning

confidence: 99%

A combined Raman spectroscopy, cathodoluminescence, and electron backscatter diffraction study of kyanite porphyroblasts from diamondiferous and diamond‐free metamorphic rocks (Kokchetav massif)

Rezvukhina

Korsakov

Rezvukhin

et al. 2019

J Raman Spectroscopy

View full text Add to dashboard Cite

A series of precise nondestructive analytical methods (Raman spectroscopy, cathodoluminescence, and EBSD—electron backscatter diffraction) has been employed to investigate the internal textures of kyanite porphyroblasts from diamondiferous and diamond‐free ultrahigh‐pressure metamorphic rocks (Kokchetav massif, Northern Kazakhstan). Such internal kyanite characteristics as twinning, radial fibrous pattern, and spotty zoning were identified by means of Raman and cathodoluminescence imaging, whereas an intergrowth of two kyanite crystals was distinguished only by Raman imaging. The EBSD analysis recorded an ~10–25° changing of orientations along the elongation in the investigated kyanite porphyroblasts. The absence of a radial fibrous pattern and a spotty zoning on the EBSD maps indicates that these textures are not related to variations in crystallographic orientation. The absence of clear zoning patterns (cores, mantles, and rims) on the Raman, cathodoluminescence, or EBSD maps of the kyanite porphyroblasts indicates the rapid single‐stage formation of these porphyroblasts near the peak metamorphic conditions and the lack of recrystallization processes. The obtained results provide important implications for deciphering of mineral internal textures, showing that the data obtained by cathodoluminescence mapping can be clearly reproduced by Raman imaging, with the latter method occasionally being even more informative. This observation is of significant importance for the study of minerals that are unexposed on a thin section surface or Fe‐ and Ni‐rich minerals that do not show luminescence emission. The combination of the Raman spectroscopic, cathodoluminescence, and EBSD techniques may provide better spatial resolution for distinguishing different domains and textural peculiarities of mineral than the selective application of individual approaches.

show abstract

“…Among them, CL imaging is the most widespread technique within the Earth sciences. Intensity-based imaging of CL emissions is commonly used to visualize internal textures of zircon, which provide valuable information on primary formation and post-growth history (e.g., Vavra 1990;Hanchar and Miller 1993;Hanchar and Rudnick 1995;Rakovan and Reeder 1996;Götze 2000Götze , 2002Corfu et al 2003;Götze et al 2013).…”

Section: Introductionmentioning

confidence: 99%

A photoluminescence study of REE³⁺emissions in radiation-damaged zircon

Lenz¹,

Nasdala²

2015

American Mineralogist

View full text Add to dashboard Cite

A series of natural zircon samples (with U concentrations of 140-2600 ppm and ranging from well crystalline to severely radiation damaged) were investigated by means of REE 3+ photoluminescence spectroscopy. We found systematic changes in REE 3+ emissions depending on the accumulated radiation damage expressed by the effective time-integrated a-dose of zircon samples. Structural reconstitution as caused by dry annealing resulted in intensity gains and decreases of half-widths of REE 3+ emissions. The band half-widths of distinct luminescence Stark's levels of the 4 F 9/2 → 6 H 13/2 transition of Dy 3+ (~17 250 cm-1 ; ~580 nm wavelength) and the 4 F 3/2 → 4 I 9/2 transition of Nd 3+ (~11 300 cm-1 ; ~885 nm wavelength) were found to correlate sensitively with the degree of radiation damage accumulated. These REE 3+ emissions are proposed as potential measure of the irradiation-induced structural disorder of zircon. The two emissions are considered particularly suitable because (1) they are commonly detected in PL spectra of natural zircon, and (2) they are hardly biased by other emissions or Stark's levels. Preliminary calibration curves that relate band-width increases to the a dose were established using a suite of well-characterized Sri Lankan zircon. Band broadening upon increasing corpuscular self-irradiation is assigned to increasing structural destruction, i.e., the increasing perturbation of REE 3+ cationic lattice sites. Possible advantages of REE 3+ luminescence spectroscopy, complementary to Raman spectroscopy, as method to quantify structural radiation damage are discussed.

show abstract

Optical microscope-cathodoluminescence (OM–CL) imaging as a powerful tool to reveal internal textures of minerals

Cited by 61 publications

References 102 publications

Laser-induced REE3+ photoluminescence of selected accessory minerals — An “advantageous artefact” in Raman spectroscopy

Laser-induced REE3+ photoluminescence of selected accessory minerals — An “advantageous artefact” in Raman spectroscopy

A combined Raman spectroscopy, cathodoluminescence, and electron backscatter diffraction study of kyanite porphyroblasts from diamondiferous and diamond‐free metamorphic rocks (Kokchetav massif)

A photoluminescence study of REE³⁺emissions in radiation-damaged zircon

Contact Info

Product

Resources

About

Optical microscope-cathodoluminescence (OM–CL) imaging as a powerful tool to reveal internal textures of minerals

Cited by 61 publications

References 102 publications

Laser-induced REE3+ photoluminescence of selected accessory minerals — An “advantageous artefact” in Raman spectroscopy

Laser-induced REE3+ photoluminescence of selected accessory minerals — An “advantageous artefact” in Raman spectroscopy

A combined Raman spectroscopy, cathodoluminescence, and electron backscatter diffraction study of kyanite porphyroblasts from diamondiferous and diamond‐free metamorphic rocks (Kokchetav massif)

A photoluminescence study of REE3+emissions in radiation-damaged zircon

Contact Info

Product

Resources

About

A photoluminescence study of REE³⁺emissions in radiation-damaged zircon