【摘要】 复式花岗岩体(岩基)的“解体”是客观地质事实的反映。通过详细的岩石学特征、接触关系、形变及变质特征研究,西秦岭党川地区的花岗岩体可解体为吴砦、太碌、大堡、石门、党川、火炎山、百花7个岩体,其同位素年龄依次为174 Ma、212 Ma、225 Ma、280 Ma、391Ma、399Ma和430 Ma。近年来的地质填图已经证实, 各岩体间均为侵入接触关系。解体地质依据充分。岩体的解体反映了岩浆活动的特征,对进一步研究岩浆事件、成矿事件和构造演化有重要的意义。更多还原

【Abstract】 The"dismtergration"of the multi-stage granitic batholiths (bodies) are the fundamental condition for objectively reflec-ting the geological facts. The detailed study on petrology, contact relationship, deformation, and metamorphism of granitic bodies shows that the granite bodies in the Dangchuan area could be disinlergrated into 7 intrusive bodies of Wucar. Tailu. Dabu, Shimon, Dangchuan. Huoyanshan and Baihua, with isotopic dating ages of 174 Ma, 212 Ma, 225 Ma, 280 Ma, 391 Ma, 399 Ma and 430 Ma respectively, deological mapping in recent years confirmed that there are intrusive contact relationships among these bodies. Besides the geological evidences, the isotopic dating ages of these bodies have shown the same paragenetic relation ships among these granitic bodies. The disintergration of these intrusive bodies has shown the geological features and facts of magmatic movements in the area, and has established a good fundament for further study on magmalic movements, ore-forming events, and tectonic evolutions in the area.更多还原