大厂花岗岩年龄及成矿时代 |
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引用本文: | 章振根,李锡林,林学农.大厂花岗岩年龄及成矿时代[J].地球化学,1984(4):303-306. |
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作者姓名: | 章振根 李锡林 林学农 |
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摘 要: | The Dachang tin ore fields is one of the largest in China, where eassiterite-sulphide-type ore deposits occur. The ages of Dachang granites which are closely related to the ore deposits are discussed in this paper. Based on sixteen K-At biotite and one U-Pb zircon ages, it is suggested that Dachang granites were formed at 72--102 m.y.The cooling rates of Dachang granites have been estimated at 18.4℃/m.y. in the arly, 13.3℃/m.y. in the middle, and 4.5℃/m.y. in the late period.
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关 键 词: | 花岗岩 地质年龄 成矿时代 锡矿 |
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