Research Article| June 01, 2015 Magmatic Apatite: A Powerful, Yet Deceptive, Mineral James D. Webster; James D. Webster 1Department of Earth and Planetary Sciences, American Museum of Natural HistoryNew York, NY 10024-5192, USAE-mail: jdw@amnh.org Search for other works by this author on: GSW Google Scholar Philip M. Piccoli Philip M. Piccoli 2Department of Geology, University of MarylandCollege Park, MD 20742-4211, USAE-mail: piccoli@umd.edu Search for other works by this author on: GSW Google Scholar Elements (2015) 11 (3): 177–182. https://doi.org/10.2113/gselements.11.3.177 Article history first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation James D. Webster, Philip M. Piccoli; Magmatic Apatite: A Powerful, Yet Deceptive, Mineral. Elements 2015;; 11 (3): 177–182. doi: https://doi.org/10.2113/gselements.11.3.177 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyElements Search Advanced Search Abstract Apatite may be a minor constituent in magmatic rocks but it is a powerful research tool because it is ubiquitous and it incorporates magmatic water, halogens, S, C, and trace elements including Sr, U, Th, and the rare earth elements. Recent advances in experimental and analytical methodologies allow geologists to analyze apatite textures and compositions in great detail. This information improves understanding of the behavior of volatiles and trace elements both in terrestrial igneous melts and their related fluids and in extraterrestrial bodies, such as the Moon and Mars. With more research, the petrological power of apatite can only increase with respect to understanding eruptive, pluton-building, and mineralizing magmatic systems. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
There are no micas plotting between 15-18 weight % ZnO.v No obvious zoning was found in the micas.v The majority of the micas analyzed are in the biotite solid solution series, trending toward phlogopite.v Two samples appear to be hendricksite, containing more than 19 weight % ZnO.v Complex Tchermak's substitution is observed in micas from both deposits.v Weight % ZnO correlates negatively with MnO, F, SiO2, MgO and positively with FeO in mica.v BaO contents of many micas are nearly 9 wt%, consistent with Ba-rich micas of Franklin analyzed previously by Tracy (1991).
Petrographic and chemical study of prefault uranium ores from the Section 30, Section 30-west, and Section 23 mines in the Ambrosia Lake mining district, New Mexico has revealed that prefault ores commonly contain several authigenic phases including a new V-Ti mineral, which formed from destruction and remobilization of primary constituents in Ti-magnetites. High-grade ore samples also contain diagenetic clausthalite. Microprobe and SEM/EDS study indicate high U concentrations along the contacts of organic matter and surrounding detrital grains. The cores of the organic matter which fill pore spaces are commonly very low in U, as well as Si, Al, V, and Fe. Petrographic relationships as well as the chemistry and U distribution of the titanomagnetite grains and organic matter imply that the U was introduced to the sediments after the organic matter was emplaced and before the sediments were compacted.
