.... This valley, approximately 50 km long, connects the Manangotry Massif, which contains monazite-rich plutonic rocks with several very large monazite occurrences, in the Anosyan mountain belt, to the Indian Ocean where sands are unusually rich in heavy minerals, including monazite. Monazite grains were...

... relative to Manangotry reference monazite 3 Percentage of common Pb on 206 Pb 4 Corrected for background, within-run Pb/U fractionation (in case of 206 Pb/ 238 U) and common Pb using Stacy and Kramers (1975) model-Pb composition, subsequently normalized to GJ-1 (ID-TIMS value/measured value...

..., the exhumation-related extensional shearing took place in both syn- and post-orogenic contexts, following several cycles of subduction–collision since the Late Cretaceous epoch ( Jolivet & Faccenna, 2000 ). Although a few regions, such as the Rhodope Massif, Cycladic Islands and Menderes Massif, have...

... concordant ID-TIMS zircon fraction yielded a 206 Pb/ 238 U date of 53.1 ± 0.2 Ma and a single-grain thorite has a 207 Pb/ 235 U age of 54.1 ± 0.1 Ma. In addition, seven U/Pb LA-MC-ICPMS spot analyses on uranothorite, normalized to primary reference material Manangotry monazite yield a 206 Pb/ 238 U- 207...

... such as the Bergen Arcs (Austrheim and Griffin, 1985 ) and Western Gneiss Region of Norway (Mørk, 1985 ; Austrheim and Engvik, 1997 ); the Sulu orogen (Hirajima et al. , 1993 ; Wallis et al. , 2007 ; Zhang and Liou, 1997 ), the Sesia Zone (Oberhänsli et al. , 1985 ) and Dora Maira massif (Koons et al...

... from the sample signal. Before each analysis the surface of the targeted zone was cleaned with 10 pulses using a spot size larger than the size used for U–Pb analysis. Pb/U and Pb/Pb ratios were calibrated against the Manangotry crystal ( Poitrasson et al. , 2000 ). This reference material was used...

...Kévin Fréville; Pierre Trap; Jonas Vanardois; Jérémie Melleton; Michel Faure; Olivier Bruguier; Marc Poujol; Philippe Lach Abstract Based on new structural, petrological and U-Th-Pb geochronological data, a reappraisal of the Variscan tectono-metamorphic history of the Pelvoux Massif (External...

..., an ablation time of 20 s and an integration time of 0.5 s. The data were processed by the Iolite data reduction program (version 2.5; Paton et al. 2011 ). The ‘44069’ monazite ( c. 424 Ma; Aleinikoff et al. 2006 ) was used as primary reference material, whereas the ‘Manangotry’ monazite ( c. 555 Ma...

... was measured during 15 s before each analysis. Analyses of unknown monazite grains were bracketed by analyses of the Manangotry monazite standard (Poitrasson et al. 2000 ). Repeated analyses of this reference mineral were used to correct for inter-element fractionation and for mass bias factor corrections...

.... Laser fluence was kept at 2–3 J cm −2 . Procedures for U–(Th)–Pb dating were the same as those reported by Cottle et al . (2009 ). Reference material Manangotry monazite and was used for U–Pb normalization of monazite, with secondary normalization to FC-1 monazite. Table 4 shows the data from U–Pb...

... extension of the GHS extends to the Ama Drime massif (Jessup et al. 2008 b ; Cottle et al. 2009 ). Approximately 100 km north of the GHS, the North Himalayan domes are a series of metamorphic core complexes that show a structural, metamorphic, and magmatic history that is almost identical...

... ( Gerdes and Zeh, 2006 ). Analytical reproducibility (Manangotry monazite and GJ-1 zircon reference standards) for 206 Pb/ 238 U was ~1.0 percent and for 207 Pb/ 206 Pb, ~0.5 percent. The total offset of the measured drift-corrected 206 Pb/ 238 U ratio from the “true” ID-TIMS varied between 8 and 20...

... crystals) using a 10 μm spot and laser fluences of 2–3 J cm −2 . The analysis of zircon followed methods similar to those of Horstwood et al . (2003) and used the 554 Ma Manangotry monazite standard for Pb/U calibration, coupled with a static ablation pattern. The overall reproducibility...

.... , Razafimahatratra , D. , Parseval , P.D. , Poitrasson , F. , Moine , B. , Seydoux-Guillaume , A.M. , Pikf , R. , Arnaudg , N. , and Giberth , F. , 2018 , The giant monazite crystals from Manangotry (Madagascar) : Chemical Geology , v. 484 , p. 36 – 50 . Ni , P. , Wang...

... (natural or synthetic), the chemical durability of monazite always appears to be very high. Indeed, the R L (La) values determined during the dissolution of natural monazite samples from Manangotry (Madagascar) at pH = 2 varied between about 5 × 10 −7 g/m 2 /day ( T = 50 °C) and 10 −4 g/m 2 /day ( T...