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Abstract:Endogenic rare and rare earth mineral deposits are widespread in China, and data of their formation ages are available from Archean to Himalayan. Studies show that the three largest types of mineral deposits in China are deposits related to alkaline rocks, granitic rocks and granitic pegmatites respectively. The ore-forming process of the alkaline type deposits lasted from Mesoproterozoic to Himalayan, mainly in Mesoproterozoic and Variscan periods. They are commonly distributed along the margins of such stable areas as the platform and are characterized by oriented distribution along extensions of deep faults or rifts. The deposits of granitic type were mostly formed in Yanshanian period and are mainly distributed in Nanling region and its neighboring areas. Ore-forming granites are often late intrusions of a large composite rock body and are distributed around such a body. Sometimes they are characterized by oriented distribution over a buried composite rock body. The deposits of the granitic pegmatite type were mainly formed in Variscan-Indosinian period, and most of the m are distributed in geosyncline folded belts , especially in composite anticlines of folded belts. Ore-forming peg matites often occur at axes and pitching ends of secondary anticlines. As examples of oriented distribution of mineral deposits, the Maoniuping and Cida deposits related to alkaline type in rifts , the Xihuashan and Dangping deposits related to granitic type and the Xiyuantou and Xikeng deposits related to pegmatitic type in folded belts have been described concretely. The above-mentioned three types of mineral deposits were discovered in western China, but for the m only very insufficient prospecting work has been done. Western China has great potentialities so far as the prospecting of the endogenic rare and rare earth mineral deposits is concerned.
.2001.Temporal and Spatial Distribution of Endogenic Rare and Rare Earth lVfineral Deposits of China[J].Mineral Deposits20(4):347~354