岩相单元
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The fine-grained syenogranite of Jinlongqiao Unit is the differentiated lithofacies of this magmatic system, and can serve as the criteria for tin ore-prospecting in this area.
其中的金龙桥单元正长花岗岩是晚期分异相 ，应作为紫金山地区锡矿重要的预测标志。
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