@article{oai:nagoya.repo.nii.ac.jp:00001426,
 author = {ITO, Masahiro and SUZUKI, Kazuhiro and YOGO, Setsuo},
 journal = {The Journal of earth and planetary sciences, Nagoya University},
 month = {Dec},
 note = {The CHIME monazite and xenotime ages were determined for two paragneisses from Madagascar. The biotite-sillimanite-cordierite-quartz-microcline-plagioclase schist at Ihosy in southern Madagascar contains core-mantle monazite grains as well as chronologically unzoned ones. The unzoned monazite grains (8 of 11 analyzed grains) give a CHIME age of 527±15 Ma. Two zoned grains show core ages of 1640±180 and 797±75 Ma with mantles of 550±50 and 535±10 Ma, respectively. The kyanite- and corundum-bearing cordierite-sillimanite-muscovite-biotite-plagioclase-quartz gneiss at Maevatanana in northwestern Madagascar contains both monazite and xenotime. Monazite and xenotime grains are chronologically uniform, and give CHIME ages of 534±10 and 530±32 Ma, respectively. These chronological data suggest that the high-grade paragneisses in Madagascar, if not all, formed through a single thermal event at ca. 530 Ma from post-797 Ma sediments. This metamorphism can be linked to the continental collision that resulted in Gondwana supercontinent.},
 pages = {89--102},
 title = {Cambrian granulite to upper amphibolite facies metamorphism of post-797 Ma sediments in Madagascar},
 volume = {44},
 year = {1997}
}