2024-03-28T22:39:58Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00001422
2023-01-16T03:46:33Z
336:337:338:344
Chemical Th-U-total Pb isochron age of zircon from the Mereb Granite in northern Ethiopia
TADESSE, Tarekegn
3311
SUZUKI, Kazuhiro
3312
HOSHINO, Mitsuo
3313
1997-12
The chemical Th-U-total Pb isochron age was determined for zircon grains from the post-tectonic Mereb Granite in northern Ethiopia. Twenty-seven analyses from five zircon grains yield a well defined isochron of 545±24 Ma. One of the analyzed grains is chronologically zoned with a core having age range of 732-828 Ma. The core is interpreted as a xenocryst. The 545±24 CHIME zircon age, slightly younger than the previously reported Rb-Sr whole-rock isochron age of 633±62 Ma, dates emplacement of the Mereb Granite, and agrees well with the 541+10/-16 Ma U-Pb zircon age for the post-tectonic Mao granite in western Ethiopia.
departmental bulletin paper
Dept. of Earth and Planetary Sciences, Nagoya University
1997-12
The Journal of earth and planetary sciences, Nagoya University
44
21
27
http://hdl.handle.net/2237/2833
0919875X
eng