Integrated detrital rutile and zircon provenance reveals …
The detrital zircon ɛHf (t) and detrital rutile provenance of the Lalun Formation differs from time-equivalent strata exposed in the northern ANS, which suggests these units were deposited in different basins separated by a drainage divide, which possibly coincides with the present-day Red Sea. In addition to supporting a position for …
Barite | NOVA Mineralogy
Barite in Hand Sample. Barite Whitish, radiating barite with reddish quartz and purplish-blackish botryoidal hematite on quartzite Barite horizon in Mapepe Formation, Fig Tree Group, Barberton Greenstone Belt, South Africa (hand sample) Barite horizon in Mapepe Formation, Fig Tree Group, Barberton Greenstone Belt, South Africa (outcrop). Barite in …
Rutilated Quartz : Properties, Formation, Occurrence, …
Rutilated quartz is a type of quartz crystal that contains needle-like inclusions of the mineral rutile (titanium dioxide). These fine, golden, or reddish-brown needle-like threads of rutile can be distributed throughout the quartz crystal in various patterns, creating striking and mesmerizing visual effects. The rutile inclusions are often …
An experimental study of Ti and Zr partitioning among …
zircon-saturated glasses, of which 22 are also saturated in rutile (rt). In seven experiments, quenched glasses coexist with quartz (qtz). SiO 2 contents of the quenched liquids range from 68.5 to 82.3 wt% (volatile free), and water concentrations are 0.4–7.0 wt%. TiO 2 contents of the rutile-saturated quenched melts are positively correlated
(PDF) Surface Chemistry and Flotation Behavior …
The Iso Electric Point (IEP) of monazite, apatite, ilmenite, quartz, rutile, and zircon are 5.3, 8.7, 3.8, 3.4, 6.3, and 50.1 respectively. Thermodynamic parameters of adsorption were evaluated ...
New thermodynamic models and revised calibrations for the Ti-in-zircon
The Ti content of zircon coexisting with rutile or other Ti-rich phases and the Zr content of rutile coexisting with zircon or other Zr-rich phases has a strong dependence on temperature (T) (Degeling 2003; Troitzsch and Ellis 2004, 2005; Zack et al. 2004; Watson et al. 2006).Zircon and rutile are common trace minerals, and thermometers …
Rutile and its applications in earth sciences
Rutile may therefore serve as a key mineral in sediment provenance analysis in the future, similar to zircon, which has been widely applied in recent decades. Importantly, rutile from high-grade metamorphic rocks can contain sufficient uranium to allow U–Pb geochronology and (U–Th)/He thermochronology. Furthermore, in situ Lu–Hf …
A systematic evaluation of the Zr-in-rutile …
Commonly, Zr is homogenously distributed in rutile crystals, but its concentration can range from a few hundred to several thousand µg/g between different …
UPb LA-(MC)-ICP-MS dating of rutile: New reference …
ID-TIMS and LA-MC-ICP-MS U Pb data of two new natural ~ 1.8 Ga rutiles are presented. They have a reproducibility of 206 Pb/ 238 U and 207 Pb/ 206 Pb of ~ 2–4% (2RSD) cf. zircon. The two rutiles are suitable to be used as reference materials for U Pb dating > 90% of 10–20 Ma unknown detrital grains (50 μm ablation spot size) can be …
Behaviour of geochronometers and timing of
This study investigates the behaviour of the geochronometers zircon, monazite, rutile and titanite in polyphase lower crustal rocks of the Kalak Nappe Complex, northern Norway. A pressure–temperature–time–deformation path is constructed by combining microstructural observations with P–T conditions derived from phase …
An experimental study of Ti and Zr partitioning among zircon, rutile …
Subliquidus experiments contained glass + zircon ± rutile ± quartz; a small number of superliquidus runs were done to generate glasses for the electron microprobe (as secondary probe standards, e.g., QLO-1-1 and QLO-1-2) and for water analyses using the SIMS (these are reported in the footnotes to Tables 2 and S1). Table 2 lists temperature, …
The average grades of ilmenite, zircon, leucoxene, and rutile…
Rutile is one of the most common HM besides zircon along the coast on both sides of the South Atlantic Ocean (Table 3) (Acevedo et al., 2007; Philander and Rozendaal, 2015). ...
Crystallization thermometers for zircon and rutile
In a strategy similar to that used for zircon, rutile crystals were grown in the presence of zircon and quartz (or hydrous silicic melt) at 1–1.4 GPa and 675–1,450°C and analyzed for Zr by EMP. The experimental results were complemented by EMP analyses of rutile grains from six natural rocks of diverse origin spanning 0.35–3 GPa and 470 ...
RESOURCE CONTROL IN NIGERIA: THE CURRENT …
Abstract: The theme of resource control has become a very controversial one in the Nigerian politics as the battle over who gets what of the nation's wealth takes the centre stage. The states which constitute the federating units claim to own resources and to them it is logical that the control of the nation's resources be allowed to them.
A refined zirconium-in-rutile thermometer | Request PDF
The Zr-in-rutile thermometer was recently refined and now predicts temperatures up to 40°C lower for T ≤550°C, and systematically higher temperatures for T .800°C (Kohn 2020). With the new ...
New thermodynamic models and revised calibrations …
Rutile coexisting with zircon at 1,350°C, 1.0 GPa, and the minimum possible (a_{text{SiO}_{2}}) buffered by zircon + zirconia …
(PDF) Application of Ti-in-zircon and Zr-in-rutile …
The recently calibrated Ti-in-zircon and Zr-in-rutile thermometers provide new tools to estimate the peak and post-peak temperatures. Rutiles within UHP mineral-bearing domains of zircon have Zr ...
New thermodynamic models and revised …
600° zircon-rutile For rocks and out-of-context zircons and rutiles with concordia diagram undefined aSiO2 and aTiO2 ; Eqs. (14) and (15) allow esti- 2.0 500° 600°, 500° aSiO2 = 1.0 mates of maximum plausible …
Geosciences | Free Full-Text | Coupled Zircon …
The benefits of applying detrital zircon-rutile U-Pb chronology as a coupled provenance proxy are presented here, with a focus on the Eastern Himalayan-Indo-Burman region, where a growing number …
Neogene global climate change and East Asian dust
The Red Clay samples for zircon and rutile analyses in this study include one TU, six JL (five with rutile data), and five BD samples (three with rutile data; Table 1). The BD samples and two of the JL samples (5.24 Ma and 3.5 Ma) have existing zircon data from Shang et al. (2016) (Table 1). Four new samples were collected from the JL and …
In situ rutile U-Pb dating based on zircon calibration using …
The present study demonstrated that zircon and rutile have similar elemental fractionation behavior in large ablation crator (>44 µm) with high diameter/depth ratio (above 1), and developed a new calibration strategy for rutile U-Pb dating by LA-ICP-MS using zircon as an external reference material with optimized analytical parameters. …
Two episodic Au–Mo mineralization in the Laowan district …
LA-ICP-MS U–Pb dating of rutile from the auriferous altered rocks yields a 206 Pb/ 238 U age of 120.0 ± 6.7 Ma (MSWD = 1.4), consistent with the ages of the associated monazite (125.0 ± 2.4 Ma) and xenotime (126.3 ± 2.0 Ma), representing the timing of the gold mineralization, coeval with Laowan monzogranite (zircon U–Pb: 128.8 …
Rutile geochemistry and its potential use in
Since Zr in rutile, coexisting with zircon and quartz, is extremely temperature dependent, this relationship can be used as a geothermometer. Metapelites always …
Zirconium in rutile thermometry of the Himalayan ultrahigh …
Our study focused on the rutile grains in the HHC mafic rocks, which preserve the highest metamorphic grades (UHP eclogites) to the north, close to the subduction-collision boundary (Fig. 2).The host felsic gneisses surrounding the UHP metabasite body underwent UHP metamorphism, indicated by the coesite inclusions in …
Porphyry Cu mineralization processes of Xinqiao deposit
1. Introduction. Xinqiao is the largest Cu-Au-S-Fe deposit in the Tongling ore district, Anhui Province, eastern China, with estimated metal reserves of >0.5 Mt Cu, 11.2 t Au, 135 Mt S, 25 Mt Fe plus Pb and Zn by-products (Xu and Zhou, 2001, Zhang et al., 2017a).It contains both stratabound massive sulfide and skarn ores, and has been the …
Direct dating of podiform Chromitite: U-Pb (Zircon, Rutile) and
New zircon isotope data (εHf and δ 18 O) and geochronological data on zircon, rutile (U-Pb) and amphibole (40 Ar/ 39 Ar) extracted from the chromite ore of Tiébaghi, a major Cr mine in New Caledonia, presented in this study are all consistent with the mid-Eocene supra-subduction setting anticipated from independent geological …
Trace Elements in Quartz, Rutile, and Zircon Active
Quartz is an ubiquitous mineral that forms in all geologic environments including diagenetic, metamorphic, plutonic, and volcanic settings. Quartz is relatively unreactive and is likely to preserve its geologic history. Trace elements in quartz offer clues to formation temperatures and pressures, fluid chemistry, and tectonic setting. Rutile and …
A refined zirconium-in-rutile thermometer
Abstract. The zirconium-in-rutile thermometer enjoys widespread use, but confidence in its accuracy is limited because experiments were conducted at higher …
Rutile and zircon U-Pb dating as a constraint on
Moreover, heavy mineral analyses combined with detrital apatite, rutile, and zircon U Pb ages from the Sichuan, Xichang, Chuxiong, Lanping and Vientiane basins …
Crystallization thermometers for zircon and rutile
The experimental results were complemented by EMP analyses of rutile grains from six natural rocks of diverse origin spanning 0.35-3 GPa and 470-1,070 °C. The concentration of Zr (ppm by weight) in the synthetic and natural rutiles also varies in log-linear fashion with T -1: log (Zr rutile) = (7.36±0.10) - 4470 ± 120/T (K). The zircon and ...
