Uranium mineralizationoccured mialy during the early Yanshan epoch, and occasionaly during the late Indochineseepoch.

铀成矿主要在燕山早期，少量产于印支晚期。

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Uranium mineralizationoccured mialy during the early Yanshan epoch, and occasionaly during the late Indochineseepoch.

铀成矿主要在燕山早期，少量产于印支晚期。

youdao