REE-bearing minerals of the Late Cretaceous ilmenite-series granites of the Inner Zone of Southwest Japan
REE-bearing minerals of the Late Cretaceous ilmenite-series granites of the Inner Zone of Southwest Japan
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日本西南部内带晚白垩世钛铁矿系花岗岩的含稀土矿物
DOI：
10.11456/shigenchishitsu1992.57.103
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
S. Ishihara
中科院分区：
文献类型：
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作者：
M. Hoshino;S. Ishihara
在山阳带的 Naegi 花岗岩和 Ryoke 带的 Busetsu 花岗岩中检查了钛铁矿系列代表性淡色花岗岩的含稀土副矿物。在Naegi黑云母花岗岩中，主要的稀土元素载体似乎是锆石边缘，然后是独居石、磷钇矿和萤石，而在布别白云母-黑云母花岗岩中，主要的稀土载体是独居石、锆石和磷钇矿。切割 Naegi 花岗岩（主相）的脉岩含有铁锰矿和锆石作为主要稀土元素载体，然后是少量的钍铁矿、金红石和萤石。因此，岩脉富含重稀土元素，这是由于轻稀土元素在主相中被消耗形成独居石。 U、Th 以及 HREE 富集在锆石的边缘，这意味着这些成分是在重氢阶段添加到主体锆石晶体中的。 EPMA 还对来自伟晶岩地区的山口岩和 Naegite（传统上称为锆石品种）进行了检查。 Yamaguchilite 含有高达 20.94 wt.% Σ REE2O3、3.87 wt.% ThO2 和 2.46 wt.% UO2，而 Naegite 含有高达 3.31 wt.% Σ REE2O3、12.63 wt.% ThO2 和 6.19 wt.% UO2。之前报道的 Naegite 中的异常 Nb 和 Ta 含量在本研究中低于检测限。因此，有人提出，这些元素来自先前分析中Naegite的微包裹体，这些分析是通过湿法对矿物分离物进行的。
REE-bearing accessory minerals of representative leucogranites of the ilmenite series were examined in the Naegi granite of the Sanyo Belt and Busetsu granite of the Ryoke Belt. Major REE-carriers appear to be rim of zircon, then monazite, xenotime and fluorite in the Naegi biotite granite, but monazite, zircon and xenotime in the Busetsu muscovite-biotite granite. Vein dikes cutting the Naegi granite (main phase) contain ferugsonite and zircon as major REE-carrier, then small amounts of thorite, rutile and fluorite. Thus, the dikes are enriched in HREE, which is due to LREE consumed to form monazite in the main phase. U and Th as well as HREE are enriched in rim of the zircon, which implies that these components were added to the host zircon crystals during the deuteric stage. Yamaguchilite and Naegite from pegmatite localities, which have been known traditionally as varieties of zircon, were also examined by EPMA. The Yamaguchilite contains up to 20.94 wt.% Σ REE2O3, 3.87 wt.% ThO2and 2.46 wt.% UO2, while the Naegite reveals up to 3.31 wt.% Σ REE2O3, 12.63 wt.% ThO2and 6.19 wt.% UO2. Formerly reported anomalous Nb and Ta contents in the Naegite fall below the detection limit in this study. It is thus proposed that these elements came from micro-inclusions of the Naegite in the previous analyses, which were done by wet-methods on the mineral separates.
日本花岗岩中的铜锰矿（Ce）：稀土元素和锰富集模式的遗传意义。
DOI：
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发表时间：
2006
期刊：
The Canadian Mineralogist 44
影响因子：
--
作者：
T. Takahashi;他4名;Yoshihiro Nakajima;上村 佳史;相田 祥昭;Yoshihiro Nakajima;中島 佳宏;Mitsuhisa Sato;Taisuke Boku;中島佳宏;Yoshihiro Nakajima;Yoshiaki Aida;Mihoko Hoshino;Mihoko Hoshino;Mihoko Hoshino;Mihoko Hoshino
通讯作者：
Mihoko Hoshino