HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS

PDF Publication Title:

HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS ( handbook-onphysics-and-chemistry-rare-earths )

Previous Page View | Next Page View | Return to Search List

Text from PDF Page: 220

184 Handbook on the Physics and Chemistry of Rare Earths FIG. 25 Plot of Ca vs Mn of the allanite-(Ce) samples, suggesting substitution of Mn for Ca. The dashed line shows the boundary between Mn-rich and Mn-poor allanite-(Ce), at 0.14 apfu Mn (Broska et al., 2000; Claeson, 2002; Hoshino et al., 2006; Catlos et al., 2000; Kartashov et al., 2002; Miyawaki et al., 2008; Oberli et al., 2004; Peterson and MacFarlane, 1993; Smith et al., 2002; Wood and Ricketts, 2000). This plot was modified from Hoshino, M., Kimata, M., Shimizu, M., Nishida, N., Fujiwara, T., 2006. Allanite-(Ce) in granitic rocks from Japan: genetic implications of patterns of REE and Mn enrichment. Can. Mineral. 44, 45–62. Van Lichtervelde et al., 2009) is highly variable, while zircon from Japanese granitic rocks has a wide range of Y content. Although hafnian zircons (HfO2>10wt.%) from many granitic pegmatite occur in the intracontinental settings, zircons from the granitic rocks in the Japanese arc always have HfO2 content less than 10 wt.% (Fig. 27). In subduction-related volcanic rocks, HFSE (Nb, Ta, Zr, and Hf ) display a characteristic depletion relative to REEs and large-ion lihophile elements (LILE) (Pearce and Peate, 1995). The average global subducted sediment is enriched in Ba, Mn, and HREEs relative to upper continental crust (Plank and Langmuir, 1998). Therefore, occurrence of Y-rich and Hf-poor zircon may be related to the above subduction magmatism, namely the Japanese island arc. Hoshino et al. (2012b) reported that monazite from magnetite-series granitic rocks is relatively rich in LREEs, whereas monazite in ilmenite-series granitic rocks exhibits enrichment in MREEs, which is similar to geochemical behavior for allanite from Japanese granitic rocks (Fig. 26). As already mentioned, mon- azite is isostructural with huttonite and cheralite, so they display variable solid

PDF Image | HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS

handbook-onphysics-and-chemistry-rare-earths-220

PDF Search Title:

HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS

Original File Name Searched:

Chemistry-Rare-Earths-49.pdf

DIY PDF Search: Google It | Yahoo | Bing

Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info

CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info

CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP