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Storey, C. Chemical Geologypp. U-Pb geochronology using laser ablation ICP-MS is a fairly recently introduced technique and thus far its development has centred on zircon dating.
Skip to search form Skip to main content. Mortensen Published In this paper we report U-Pb zircon and titanite data and interpreted ages for sixteen rocks Figure 1 sampled in support of regional mapping projects conducted by the British Columbia Geological Survey Branch during the midto lates. Each sample is reported with geological context, interpretation of U-Pb data and significance of the date.
Titanitealso called sphenetitanium and calcium silicate mineral, CaTiSiO 4 O,OH,Fthat, in a crystallized or compact form, makes up a minor component of many igneous rocks and gneissschistcrystalline limestone, and pegmatite. For detailed physical properties, see silicate mineral table. We welcome suggested improvements to any of our articles.
Dating shear zones with plastically deformed titanite: new insights into the orogenic evolution and ore remobilization history of the Sudbury impact structure Ontario, Canada. T1 - Dating shear zones with plastically deformed titanite: new insights into the orogenic evolution and ore remobilization history of the Sudbury impact structure Ontario, Canada. N2 - The Sudbury structure is a mineralized impact crater that hosts different families of ore-controlling shear zones with poorly known orogenic affinities.
We sampled two units of the Little Goose Creek complex to address the question of whether WISZ deformation was broadly distributed across the shear zone and whether strain localization played a significant role in the deformation of this shear zone. Unit Gpg is a potassium feldspar megacrystic porphyritic orthogneiss and unit Gtg is a coarse-grained tonalite orthogneiss. Both units have the same macroscopic fabric orientation.
In radiometric datingclosure temperature or blocking temperature refers to the temperature of a system, such as a mineralat 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.
International Kimberlite Conference. Skip to main content Skip to main navigation menu Skip to site footer. Agashev Y.
Combined oxygen-isotope and U-Pb zoning studies of titanite : New criteria for age preservation. Here, titanite is an important U-Pb chronometer for dating geologic events, but its high-temperature applicability depends upon its retention of radiogenic lead Pb. This study therefore investigates the utility of O-isotope zoning as an indicator for U-Pb zoning in natural titanite samples from the Carthage-Colton Mylonite Zone of the Adirondack Mountains, New York.