Assessing trace element (dis)equilibrium and the application of single element thermometers in metamorphic rocks

Cruz‐Uribe, Alicia M.; Feineman, M. D.; Zack, Thomas; Jacob, Dorrit E.

doi:10.1016/j.lithos.2018.05.007

Cited by 31 publications

(16 citation statements)

References 94 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To check the analytical precision of the instrument, we analyzed two homogenous rutile grains from the Itabara mine, Brazil for the abovementioned elements (n = 42), all the results showed an analytical error of less than 5%. Past publications reported zirconium-in rutile thermometry of rutile grains that were mainly analyzed by EPMA or LA-ICP-MS (e.g., Zack et al, 2002Zack et al, , 2004Watson et al, 2006;Zack and Luvizotto, 2006;Ferry and Watson, 2007;Tomkins et al, 2007;Zhang et al, 2009;Kooijman et al, 2012;Ewing et al, 2013;Kohn et al, 2016;Pape et al, 2016;Cruz-Uribe et al, 2018;Pape et al, 2016;Zack and Kooijman, 2017;Rehman et al, 2019 and references therein). In this study, we tried to analyze rutile for zirconium contents using the XGT for the first time.…”

Section: Analytical Proceduresmentioning

confidence: 99%

Zirconium in rutile thermometry from garnet granulites of the Jijal complex of Kohistan arc, NW Himalaya

Nakazawa

Rehman

Yamamoto

et al. 2020

Journal of Mineralogical and Petrological Sciences

View full text Add to dashboard Cite

Zirconium in rutile thermometry data from the garnet granulites of the Jijal Complex of Kohistan arc, NW Himalaya are presented in this study. The garnet granulites are composed of garnet, clinopyroxene, plagioclase, quartz, symplectic augite/amphibole, rutile, ilmenite, zircon, and magnetite. Rutile grains range in size from 50 to 350 µm, occur as inclusion in garnet, clinopyroxene, and in plagioclase as well as along the grain boundaries. In total 19 rutile grains were analyzed for Zr contents using an X-ray Analytical Microscope (XGT-5000) by HORIBA. The Zr contents among the analyzed grains ranged between 450 and 920 ppm, where the analyzed spots with lower Zr contents (containing SiO 2 or Fe 2 O 3 ), indicating some influence of host silicate or ilmenite, were removed from results. At the individual grain scale, most of the rutile grains exhibited homogeneous chemical compositions, regardless of their textural affinity. Temperature values, based on zirconium in rutile thermometry, ranged between 792 and 849°C for rutile enclosed in garnet, 771 and 851°C for rutile in clinopyroxene, and 784 and 862°C for rutile in plagioclase whereas matrix rutile grains showed T values between 820 and 847°C. Using the pressure-dependent zirconium in rutile thermometry, the T values were slightly lower (±50 to 100°C). The maximum temperature values were consistent with the temperature data obtained from the conventional thermobarometry results (P; 1.2 ± 0.2 GPa and T; 818 ± 80°C) whereas the lower values, likely, reflect chemical resetting of the analyzed grains during later stages of retrogression.

show abstract

Section: Analytical Proceduresmentioning

confidence: 99%

Zirconium in rutile thermometry from garnet granulites of the Jijal complex of Kohistan arc, NW Himalaya

Nakazawa

Rehman

Yamamoto

et al. 2020

Journal of Mineralogical and Petrological Sciences

View full text Add to dashboard Cite

show abstract

“…Titanite U–Pb dates have been interpreted to reflect a variety of processes, including neocrystallization and growth (Castelli & Rubatto, 2002; Cioffi et al, 2019; Corfu, 1996; Kohn & Corrie, 2011; Rapa et al, 2017; Scott & St‐Onge, 1995; Spencer et al, 2013; Stearns et al, 2015, 2016; Storey, Smith, & Jeffries, 2007; Verts et al, 1996; Walters & Kohn, 2017), fluid‐driven recrystallization or alteration (Cioffi et al, 2019; Corfu, 1996; Garber et al, 2017; Holder & Hacker, 2019; Marsh & Smye, 2017; Storey, Smith, & Jeffries, 2007), Pb volume diffusion and cooling (Cherniak, 1993; Kirkland et al, 2016; Mattinson, 1978; Mezger et al, 1991; Spear & Parish, 1996; Tucker et al, 1987), and deformation‐induced recrystallization (Bonamici et al, 2015; Gordon et al, 2021; Papapavlou et al, 2017, 2018; Spencer et al, 2013; Timms et al, 2020). Additionally, disequilibrium between titanite and zircon (or quartz) may result in overestimated Zr‐in‐titanite temperatures (Cruz‐Uribe et al, 2018; Cioffi et al, 2019; Johnson et al, 2020). Combined, these factors greatly complicate linking titanite textures, compositions, and U–Pb dates to metamorphic, metasomatic, and tectonic processes.…”

Section: Introductionmentioning

confidence: 99%

Strengths and limitations of in situ U–Pb titanite petrochronology in polymetamorphic rocks: An example from western Maine, USA

Walters

Cruz‐Uribe

Song

et al. 2022

Journal Metamorphic Geology

View full text Add to dashboard Cite

Titanite is a potentially powerful U–Pb petrochronometer that may record metamorphism, metasomatism, and deformation. Titanite may also incorporate significant inherited Pb, which may lead to inaccurate and geologically ambiguous U–Pb dates if a proper correction is not or cannot be applied. Here, we present laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS)‐derived titanite U–Pb dates and trace element concentrations for two banded calcsilicate gneisses from south‐central Maine, USA (SSP18‐1A and SSP18‐1B). Single spot common Pb‐corrected dates range from 400 to 280 Ma with ±12–20 Ma propagated 2SE. Titanite grains in sample SSP18‐1B exhibit regular core‐to‐rim variations in texture, composition, and date. We identify four titanite populations: (1) 397 ± 5 Ma (95% CL) low Y + HREE cores and mottled grains, (2) 370 ± 7 Ma high Y + REE mantles and cores, (3) 342 ± 6 Ma cores with high Y + REE and no Eu anomaly, and (4) 295 ± 6 Ma LREE‐depleted rims. We interpret the increase in titanite Y + HREE between ca. 397 and ca. 370 Ma to constrain the timing of diopside fracturing and recrystallization and amphibole breakdown. Apparent Zr‐in‐titanite temperatures (803 ± 36°C at 0.5 ± 0.2 GPa) and increased XDi suggest a thermal maximum at ca. 370 Ma. Population 3 domains dated to ca. 342 Ma exhibit no Eu anomaly and are observed only in compositional bands dominated by diopside (>80 vol%), suggesting limited equilibrium between titanite and plagioclase. Finally, low LREE and high U/Th in Population 4 titanite dates the formation of hydrous phases, such as allanite, during high XH2O fluid infiltration at ca. 295 Ma. In contrast to the well‐defined date–composition–texture relationships observed for titanite from SSP18‐1B, titanite grains from sample SSP18‐1A exhibit complex zoning patterns and little correlation between texture, composition, and date. We hypothesize that the incorporation of variable amounts of radiogenic Pb from dissolved titanite into recrystallized domains resulted in mixed dates spanning 380–330 Ma. Although titanite may reliably record multiple phases of metamorphism, these data highlight the importance of considering U–Pb data along with chemical and textural data to screen for inherited radiogenic Pb.

show abstract

“…Trace element geothermometers are especially useful for high‐pressure granulites because, in general, garnet is the only Fe‐Mg phase in rocks with pelitic protoliths, so conventional exchange thermometry is not possible. In recent decades, single element geothermometers, such as Ti‐in‐quartz and Zr‐in‐rutile, have become important tools for calculating crystallization T in metamorphic rocks (e.g., Ashley & Law, 2015; Cruz‐Uribe et al (2018); Kendrick & Indares, 2018a; Pape et al, 2016; Pauly et al, 2016; Taylor‐Jones & Powell, 2015; Thomas et al, 2010, 2015) since they are also generally considered less prone to post‐peak resetting than, for example, Fe‐Mg thermometers. Ti‐in‐quartz and Zr‐in‐rutile equilibria are also affected by pressure, so that if quartz and rutile are in equilibrium, it is possible to extract both P and T information (Thomas et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Petrochronology of high‐pressure granulite facies rocks from Southern Brasília Orogen, SE Brazil: Combining quantitative compositional mapping, single‐element thermometry and geochronology

Fumes

Luvizotto

Moraes

et al. 2021

Journal Metamorphic Geology

Self Cite

View full text Add to dashboard Cite

We use a combination of several in situ techniques to assess the P‐T‐t path of high‐pressure granulites from the Passos Nappe in the Southern Brasília Orogen (SE Brazil). Quantitative element mapping and single‐element thermometers (Zr‐in‐rutile and Ti‐in‐quartz) are coupled with P‐T pseudosections and monazite and rutile dating. Compositional and temperature maps, based on cathodoluminescence mapping and in situ analyses of Ti‐in‐quartz, are presented as a novel approach to evaluate crystallization temperature. The studied rocks have a pelitic protolith and record a peak pressure assemblage of garnet + kyanite + rutile + K‐feldspar + quartz + melt ± plagioclase that formed at ~830°C and 1.2 GPa. Retrograde conditions of ~560°C and 0.6 GPa are determined based on the grossular content of garnet and the crystallization of biotite and ilmenite. Metamorphic peak conditions occurred ca. 635 Ma, according to monazite dating, with a younger date of ca. 615 Ma associated with later kyanite crystallization. Rutile ages of ca. 590 Ma are linked to the late retrograde stage (at ~600°C). Results show that the distribution of Ti‐in‐quartz is heterogeneous, decreasing in abundance towards the rim of crystals, though the higher temperatures constrained with Ti‐in‐quartz thermometry are broadly consistent with peak conditions. The peak pressure conditions are consistent with continental collision setting in the Southern Brasília Orogen and were followed by an early cooling/decompression stage and then by a slow cooling during exhumation and transport to shallower crustal levels.

show abstract

Assessing trace element (dis)equilibrium and the application of single element thermometers in metamorphic rocks

Cited by 31 publications

References 94 publications

Zirconium in rutile thermometry from garnet granulites of the Jijal complex of Kohistan arc, NW Himalaya

Zirconium in rutile thermometry from garnet granulites of the Jijal complex of Kohistan arc, NW Himalaya

Strengths and limitations of in situ U–Pb titanite petrochronology in polymetamorphic rocks: An example from western Maine, USA

Petrochronology of high‐pressure granulite facies rocks from Southern Brasília Orogen, SE Brazil: Combining quantitative compositional mapping, single‐element thermometry and geochronology

Contact Info

Product

Resources

About