Titanite U-Pb dating and geochemical constraints on the …
2022年3月1日 · In the present study, in-situ U-Pb isotopic and major and trace element analyses of titanite have been conducted to reveal the origin and formation of titanite, and to elucidate the genetic link between Nb-Ta mineralization and alkaline granites as well as leptynites.
Interpreting titanite U–Pb dates and Zr thermobarometry in high …
2019年5月13日 · A notable difference between the empirical and experimental studies of elemental diffusion in titanite is that the experimental studies have used near-end-member CaTiSiO 5 —as evident from its pale green color, minimal Al–Fe content, and near 100 wt% totals for EPMA measurements of major elements (Online Resource 1)—whereas most titanite ...
Titanite EPMA data. (a) FeKα chemical map of titanite with …
Here, we investigate textural and compositional variations of the titanite from the granitic bedrocks to weathered profiles in the Zuokeng regolith-hosted REE deposit, the largest one that is...
Controls on Trace Element Uptake in Metamorphic Titanite: …
2017年9月8日 · Grain- and thin-section-scale titanite and biotite major and trace element chemistry (EPMA) Titanite EPMA data for eight samples are summarized in Table 2. The analyzed suite includes three samples with neoblastic titanite, two samples with recrystallized Caledonian titanite without relict Precambrian cores, and three samples with Precambrian ...
Matrix effects and improved calibration procedures for SIMS titanite ...
2022年3月30日 · Herein, to understand the extent to which the variation of titanite composition and structure can cause a matrix effect in SIMS titanite U Pb dating, electron probe microanalysis (EPMA) and Raman spectroscopy were applied to investigate seven different titanite samples in the context of SIMS U Pb dating.
EPMA geochemistry and LA-ICPMS dating of allanite, epidote, …
2021年7月1日 · Titanite (100–600 um), light brown to pale yellow in color, occurs in amphibolite, biotite schist, chlorite schist and meta-conglomerate. Titanite-bearing samples used in this study was collected from the chlorite schist and meta-conglomerate, the latter partly host the footwall uranium lode (Fig. 2 B). The studied chlorite schist is ...
LA-ICP-MS mineral chemistry of titanite and the geological
2014年12月10日 · Therefore, in order to evaluate the reliability of major-element data by LA-ICP-MS, major element coompositions of several titanite grains analysed by LA-ICP-MS from sample YL907 were measured by EMPA (EPMA-1600, Shimadu, Japan) at the State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences.
U‐Th‐Pb and Trace Element Evaluation of Existing Titanite and …
This study presents new U-Th-Pb isotope and major-, minor- and trace-element mass fraction data for ten titanite and five apatite reference materials based on integrated EPMA, LA-ICP-MS and isotope-dilution (ID) multi-collector (MC)-ICP-MS characterisation.
Titanite Petrochronology Records Secular Temperature and Fluid ...
2023年5月22日 · We combine backscattered electron (BSE) imaging, electron backscatter diffraction (EBSD) data, laser-ablation split-stream ICP-MS (LASS) analyses of U-Pb dates and trace-element concentrations together with electron probe microanalysis (EPMA) measurements of F contents to relate titanite U-Pb dates to zoning, microstructures, and trace-element ...
In this study, in situ major trace element compositions of two titanite single crystals in Mogok, Myanmar, have been studied through electron probe microanalysis (EPMA) and LA-MC-ICP-MS. Spectral features are obtained and compared with the calibration spectra in the RRUFF database [30]. Our aims were to establish potential young titanite standard