CAJ | 학술논문

早向垩世西对面沟花岗岩岩体的岩石地球化学研究表明,它具有高锶花岗岩的特征:高铝(Al2O3=14.51%～16.57%,平均为15.434%)、富钠(Na2O=3.75%～4.71%,平均为4.313%)、高锶(Sr=701×10-6～931×10-6平均为802×10-6),强烈重稀土亏损,无明显的负铕异常或具有正铕异常,过渡元素富集.该岩体很可能与中国东部岩石圈减薄有关对探讨华北克拉通北缘岩浆起源有重要意义.
조향성세서대면구화강암암체적암석지구화학연구표명,타구유고송화강암적특정:고려(Al2O3=14.51%～16.57%,평균위15.434%)、부납(Na2O=3.75%～4.71%,평균위4.313%)、고송(Sr=701×10-6～931×10-6평균위802×10-6),강렬중희토우손,무명현적부유이상혹구유정유이상,과도원소부집.해암체흔가능여중국동부암석권감박유관대탐토화북극랍통북연암장기원유중요의의.
Lithogeochemical study shows that the Early Cretaceous Xiduimiangou rock body is typical high-Sr granite, characterized by high Al (14.51% to 16.57% of Al2O3, 15.434% in average), high Na (3.75% to 4.71% of Na2O, 4.313% in average) and high Sr (701×10-6 to 931 × 10-6 of St, averagely 802×10-6) contents, with severe H REE deficiency (21.07 -29.13 of (La/Yb)N, 23.54 in average), slightly negative or positive Eu anomalies and rich transitional elements. The rock body is likely related to the thinning of lithosphere in Eastern China. It is importantly significant for the research on the origin of magma in the northern margin of North China Craton.