壳型花岗岩具较高的铅同位素比值和富铀铅贫钍铅的特点；
The crust granites have higher lead isotope ratios and are richer in uranium lead but poorer in thorium lead.
铅同位素研究揭示，该板块富铀、钍，从而为铀矿省的形成提供了必不可少的地质前提。
The plate is enriched in U and Th revealed by Pb-isotopic study, which plays an role of essential prerequisite for the formation of U province.
铅钍石是钍石的新变种，属首次发现。
The plumbothorite discovered for the first time is a new variety of thorite.
铅钍石是钍石的新变种，属首次发现。
The plumbothorite discovered for the first time is a new variety of thorite.
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