Reviews in Mineralogy and Geochemistry ; 83 1 : — Rutile TiO 2 is an important accessory mineral that, when present, offers a rich source of information about the rock units in which it is incorporated. It occurs in a variety of specific microstructural settings, contains significant amounts of several trace elements and is one of the classical minerals used for U—Pb age determination. Here, we focus on information obtainable from rutile in its original textural context. We do not present an exhaustive review on detrital rutile in clastic sediments, but note that an understanding of the petrochronology of rutile in its source rocks will aid interpretation of data Shibboleth Sign In. OpenAthens Sign In.
Geochemical and geochronological dataset of rutile from a Variscan metabasite in Sardinia, Italy
Email address:. Rutile dating. Laser-Ablation split-stream lass analysis in situ trace element, we will test rutile and zircon from approximately —
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This study investigates Ti mobility in the presence of halogens, as shown by the hydrothermal alteration of magmatic rutile in syenite. The syenite pegmatite studied intrudes gabbro, is preserved as a tectonic block in a major strike-slip fault zone, and formed in a back-arc environment in which there was widespread A-type granite plutonism. Magmatic rutile in the syenite forms millimetric-scale crystals rimmed by magmatic titanite and magnetite and also occurs as smaller interstitial crystals.
The syenite was synchronous with the later phases of regional A-type granite plutonism. Later hydrothermal halogen-rich fluids, derived from dissolution of halite, produced widespread metasomatic scapolite in the syenite. Such fluids resulted in local dissolution-reprecipitation of Ti and Zr and resetting of the U-Pb system in the altered rutile, at Variations in dissolution and transport of Zr and Ti by halogen-rich fluids affect the Zr in rutile geothermometer, which yields unrealistic temperatures when applied in this study.
More generally, the complexities of rutile chemistry in this hydrothermal setting could be reproduced in deeper subduction settings as a result of variations in halogen content of fluids released by prograde metamorphism. Altree-Williams, A. Earth-Science Reviews, , — Andersen, T. Chemical Geology, , 59—
Metrics details. These sampled both oceanic brecciated material and a blackwall reaction zone in contact with a micaschist and serpentinized peridotite. Textural observations combined with new geochronological data indicate that rutile and titanite both grew below their closure temperatures during Alpine metamorphism. We present a technique to calculate the most precise and accurate ages possible using a two-dimensional U—Pb isochron on a Wetherill concordia.
Rutile from two samples gave a U—Pb isochron age of Titanite from three samples gave a U—Pb isochron age of
rutile reference materials that can be used to assess reproducibility and accuracy of the dating technique, with the exception of e.g. rutile R10 and R19 (Luvizotto.
This paper presents new data related to the emplacement ages of the Amakinskaya and Taezhnaya kimberlites of the Mirny field, Siberia, located in the southern part of the Yakutian diamondiferous province. This study analyzed rutile and titanite grains along with zircons for U-Pb isotope composition by laser ablation LA -inductively coupled plasma-mass spectrometry ICP-MS and evaluated the applicability of rutile and titanite for the dating of kimberlite emplacements.
Both minerals contain substantial admixtures of common Pb in their Pb isotope composition. Therefore, the Pb method was applied for common Pb correction during age calculation. All age estimates correspond to the main epoch of diamondiferous kimberlite activity in the Siberian platform and suggest the formation of the Mirny kimberlite field within a single event or two separate events occurring close together in time. Results obtained from this study indicate that rutile and titanite can be useful for the dating of kimberlite emplacements.
Time resolved rutile U/Pb data derived from LA-ICPMS – a case study from the North Pamir
A Nature Research Journal. Rutile, a common accessory mineral in a wide variety of rocks, is the most stable naturally occurring TiO 2 polymorph.
Furthermore, we will test rutile (U-Th)/He dating on fast-cooled volcanic rocks as well as more slowly-cooled sample arrays from the KTB ultra-deep borehole.
Geochronology is the science of providing ages of events in the history of the Earth and extraterrestrial material and of determining the temporal rates of geological processes by using a number of different dating methods. The ages can be absolute e. Most absolute dating methods rely on the analysis of radioactive isotopes and their radiogenic decay products. A number of radioactive isotopes from different elements, such as uranium, thorium, rhenium, samarium, lutetium, rubidium and potassium are used for this purpose.
Techniques exist to date practically all geological materials, from billions of years in age to historical records. For instance:. From the large number of different geochronological methods we are currently apply the following:. Show navigation. Hide navigation. Information for Most searched-for services Websites Staff search Search.
A common oxide mineral is rutile TiO2 , which is present as an accessory mineral in many magmatic rocks and also occurs widely in high-grade metamorphic rocks, especially in blueschists, eclogites, and granulites. The scientific results and methodologies developed during our study will be disseminated to the geosciences community through publication of research papers and presentations at international meetings. Some full text articles may not yet be available without a charge during the embargo administrative interval.
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Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: Parrish and Matthew S. View via Publisher. Save to Library. Create Alert. Launch Research Feed. Share This Paper. Laura Bracciali Compositional modification and trace element decoupling in rutile: Insight from the Capricorn Orogen, Western Australia. Kylander-Clark Figures and Tables from this paper.
Rutile U-Pb Geochronology
Many radioactive dating methods are based on minute additions of daughter products to a rock or mineral in which a considerable amount of daughter-type isotopes already exists. These isotopes did not come from radioactive decay in the system but rather formed during the original creation of the elements. In this case, it is a big advantage to present the data in a form in which the abundance of both the parent and daughter isotopes are given with respect to the abundance of the initial background daughter.
microbeam U‐Pb dating and Hf isotopic determination. This study introduces the RMJG rutile as a new potential reference material, which.
In radiometric dating , closure temperature or blocking temperature refers to the temperature of a system, such as a mineral , at the time given by its radiometric date. In physical terms, the closure temperature is the temperature at which a system has cooled so that there is no longer any significant diffusion of the parent or daughter isotopes out of the system and into the external environment. Dodson , “Closure temperature in cooling geochronological and petrological systems” in the journal Contributions to Mineralogy and Petrology , , with refinements to a usable experimental formulation by other scientists in later years.
The closure temperature of a system can be experimentally determined in the lab by artificially resetting sample minerals using a high-temperature furnace. As the mineral cools, the crystal structure begins to form and diffusion of isotopes slows. At a certain temperature, the crystal structure has formed sufficiently to prevent diffusion of isotopes. This temperature is what is known as blocking temperature and represents the temperature below which the mineral is a closed system to measurable diffusion of isotopes.
These temperatures can also be determined in the field by comparing them to the dates of other minerals with well-known closure temperatures. Closure temperatures are used in geochronology and thermochronology to date events and determine rates of processes in the geologic past. The following table represents the closure temperatures of some materials. These values are the approximate values of the closure temperatures of certain minerals listed by the isotopic system being used.
These values are approximations; better values of the closure temperature require more precise calculations and characterizations of the diffusion characteristics of the mineral grain being studied. From Wikipedia, the free encyclopedia. This article is about radiometric dating.
Box , Beijing , P. E-mail: xieliewen mail. The advantages include high spatial resolution, high sample throughput, good precision and accuracy, and limited sample preparation. For the application of these techniques in U—Th—Pb geochronology, the main challenges involve ion counter drift, matrix differences between reference materials and samples, laser-induced downhole elemental fractionation and common lead corrections.
We review recent efforts to improve spatial resolution, calibrate ion counter drift, and correct for common lead contamination, elemental fractionation and matrix mismatching. Multi-collectors simultaneously measure all isotopic signals over flat-topped peaks so that 1 the detection efficiency is significantly improved and relatively high spatial resolution is obtained, 4,5 and 2 the effects of spectral skew and flicker noise from the plasma source or ablated particles are removed or significantly reduced, resulting in improved counting statistics and lower internal and external uncertainties in isotopic ratios.
LA-ICP-MS U-Pb dating of accessory minerals (rutile, zircon,) diffusion of trace elements in minerals (e.g. Pb in rutile); Gondwana tectonics and Palaeozoic.
The mineral provides a reliable single-mineral thermometer, capable of retaining temperature T information during high and ultra-high temperature metamorphism. Its HFSE contents can be used to investigate the geochemical environment in which rutile crystallized. The use of diffusion profiles in geothermometry is a relatively well-developed method, e. The potential of using Pb diffusion profiles in rutile to determine peak T of a rock has not previously been explored. This project aims to constrain peak T, age, and cooling history using Pb diffusion profiles in rutile exclusively.
The approach is to select large rutile grains from high T metamorphic rocks that have a well-known thermal history. Combined with the known diffusion coefficients of Pb in rutile the profiles will yield probable crystallization tempera-tures for rutile and a cooling history towards the closure T for Pb in rutile.
Geosciences, 9 11 , doi The significant and continuous improvement of instrumentation and approaches has opened new fields of applications by extending the range of minerals that can be dated by this method. Following the development and distribution to the community of good quality reference materials in the last decade, rutile U-Pb thermochronology with a precision only slightly worse than zircon has become a commonly used method to track cooling of deep-seated rocks.
Rutile is a common accessory mineral that occurs in a wide spectrum of metamorphic rocks, such as in blueschists, eclogites, and granulites.
Published in Contributions to Mineralogy and Petrology on February 10, Rutile is a common accessory mineral that occurs in a wide spectrum of metamorphic rocks, such as in blueschists, eclogites, and granulites and as one of the most stable detrital heavy minerals in sedimentary rocks. The advent of rutile trace element thermometry has generated increased interest in a better understanding of rutile formation.
Rutile thermometry of the same detrital grains indicates former granulite-facies conditions. The methods outlined in this paper should find wide application in studies that require age information of single spots, e. Log in.