Apatite recrystallisation during prograde metamorphism, Cooma, southeast Australia: implications for using an apatite – graphite association as a biotracer in ancient metasedimentary rocks
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Apatite as a main source of REE during crystallization of monazite mineral in Esfordi Fe-Apatite deposit, northeast of Bafq
The Esfordi deposit is located at northeastern Bafq and is one of the well-known magnetite-apatite deposits in the area which consists of ore minerals hosted REE. Among the various ore minerals, apatite is one of the unique minerals because of its significant properties such as providing a budget of elements (especially in the case of REE), stability over widespread temperature and pressure dom...
متن کاملApatite Formation: Why It May Not Work as Planned, and How to Conclusively Identify Apatite Compounds
Calcium phosphate apatites are inorganic compounds encountered in many different mineralized tissues. Bone mineral, for example, is constituted of nanocrystalline nonstoichiometric apatite, and the production of "analogs" through a variety of methods is frequently reported. In another context, the ability of solid surfaces to favor the nucleation and growth of "bone-like" apatite upon immersion...
متن کاملComment on “Apatite He/He and (U-Th)/He Evidence for an Ancient Grand Canyon”
Flowers and Farley (Reports, 21 December 2012, p. 1616; published online 29 November 2012) use thermochronometry to propose that the western paleo–Grand Canyon was nearly as deep 70 million years ago (Ma) as today. However, lithologies, facies relations, geomorphology, and paleotopography of Miocene interior-basin deposits near the mouth of the Grand Canyon show that no paleocanyon existed in t...
متن کاملComment on "Apatite 4He/3He and (U-Th)/He evidence for an ancient Grand Canyon".
Flowers and Farley (Reports, 21 December 2012, p. 1616; published online 29 November 2012) propose that the Grand Canyon is 70 million years old. Starkly contrasting models for the age of the Grand Canyon-70 versus 6 million years-can be reconciled by a shallow paleocanyon that was carved in the eastern Grand Canyon 25 to 15 million years ago (Ma), negating the proposed 70 Ma and 55 Ma paleocan...
متن کاملApatite 4He/3He and (U-Th)/He evidence for an ancient Grand Canyon.
The Grand Canyon is one of the most dramatic features on Earth, yet when and why it was carved have been controversial topics for more than 150 years. Here, we present apatite (4)He/(3)He thermochronometry data from the Grand Canyon basement that tightly constrain the near-surface cooling history associated with canyon incision. (4)He/(3)He spectra for eastern Grand Canyon apatites of differing...
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ژورنال
عنوان ژورنال: Australian Journal of Earth Sciences
سال: 2007
ISSN: 0812-0099,1440-0952
DOI: 10.1080/08120090701488321