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研究结果表明,富水中基性侵入杂岩可能为不同时代亏损地幔源岩浆侵入活动的产物。其中中细粒角闪辉长岩、具斑杂构造的中细粒角闪黑云辉长岩、中粗粒角闪黑云二长岩为同一岩浆源岩浆演化序列,角闪黑云二长岩中锆石U-Pb同位素年龄值(514.3±1.3)Ma代表了其形成时代,反映了早古生代的一次重要“造壳事件”。角闪黑云闪长岩的Sm、Nd同位素地球化学特征明显不同于前3种岩石,反映了富水中基性侵入杂岩形成演化的复杂性。
The results show that the basic intrusive complex in water-rich may be the product of mantle-derived magmatic intrusion in different periods. Among them, fine-grained hornblende gabbros, fine-grained hornblende-biotite gabbros with a banded structure, medium-coarse-grained hornblendeble biotite are the same magmatic source magmatic evolution sequence, The zircon U-Pb isotopic ages of the rocks (514.3 ± 1.3) Ma represent the age of their formation and reflect an important “crust formation event” of the Early Paleozoic. The Sm and Nd isotopic geochemical characteristics of hornblenhydrite-type diorites are obviously different from those of the first three types of rocks, reflecting the complexity of formation and evolution of basic intrusive complexes in rich water.