Ti-in-zircon thermometry: applications and limitations

Oxygen isotope and trace element geochemistry of zircons from porphyry copper system: Implications for Late Triassic metallogenesis within the Yidun Terrane, southeastern Tibetan Plateau

“…The PDL zircons containing uniformly low concentrations of Ti (~4-6 ppm) and showing T TiZ values of~640°C-863°C for Pulang zircons (generally between 640°C and 690°C), 648°C-744°C for Lannitang zircons, and 644-716°C for Disuga zircons (see Appendix D), which are comparable to the range of temperatures reported from similar magmatic arc systems elsewhere (e.g., felsic-intermediate plutonic rocks from the Sierra Nevada, with T TiZ temperatures of 651°C ± 136°C (n = 130; Ti = 4.5 ± 8.5 ppm; Fu et al, 2008;Fig. 4).…”

“…4). These low T TiZ temperatures probably suggest that PDL zircons crystallized under lower solidus temperature conditions associated with water-rich magmas (Fu et al, 2008), or their parental magmas have undergone the fractionation of amphibole before the zircon crystallization (see Section 5.1.2). The fractionation of amphibole could efficiently drove the melt compositions to lower TiO 2 concentrations (Davidson et al, 2007), and thus depleted the available Ti budget for the later crystallized zircons, and resulting in zircons with lower Ti concentrations and lower calculated zircon T Tiz values.…”

“…Additionally, the Ti-in-zircon thermometer may actually underestimate true crystallization temperatures (Fu et al, 2009) owing to the uncertainties in inferred activities of SiO 2 and TiO 2 , effect of pressure correction, subsolidus resetting of Ti compositions, non-Henry's Law substitution of Ti in zircon, disequilibrium crystallization from melts, and thus PDL zircons may have formed at even higher temperatures. Nevertheless, the general low Ti-in-zircon temperatures (~600°C-800°C) reported for the felsic-intermediate igneous rocks associated with or without porphyry copper mineralization sampled from subduction zones around the world (e.g., Fu et al, 2008;Dilles et al, 2015;Shen et al, 2015) probably revealed that common process(es) may functioned in the arc magma genesis and/or magmatic evolutionary paths. Carley et al (2014) found that zircons from tectonic settings where there is no subduction influence and little or no continental lithosphere, e.g., Icelandic and MORB zircons, were notably distinguished by higher Ti and middle REE (MREE) and HREE concentrations from that of Phanerozoic arcs.…”

Paleoarchean Zircons from Quartzite of South Bundelkhand Supracrustal Complex:Origin and Implications for Crustal Evolution in Bundelkhand Craton, Central India

“…It is to be noted that a majority of the discordant zircons show much higher titanium-in-zircon temperatures compared to concordant ones (Table 1), which might be due to inputs from later hydrothermal fluids. The calculated crystallization temperatures from quartzite are similar to average crystallization temperatures of Early Archean detrital zircons, thereby pointing towards granitic parent magma 10,52,54 . This is also corroborated by the presence of zircon inclusions like quartz, muscovite, magnetite and monazite which are characteristic of granitoids (Figure 3).…”

“…Titanium-in-zircon thermometry has been applied to a growing number of natural zircons 10,52,53 . Titaniumin-zircon temperatures ranging from 620C to 776C were estimated from quartzite of Girar supracrustal belt (Table 1).…”