However , it is unsubstantial for the investigation on chorology and geochemisty , and dissimilar for the research on petrogenesis and tectonic setting 但关于它们的年代学和系统的地球化学研究还比较薄弱，且对其成因和形成的构造环境，仍存在着争议。
2.
Therefore , based on the isotopic chorology , petrochemistry , geochemisty and sr , nd , pb isotope , the ph . d dissertation mainly studied some yanshanian mafic dikes , volcanic rocks and alkalic - ultramafic dikes in shandong province 本论文主要从同位素年代学、岩石化学、地球化学和sr ? nd ? pb同位素方面对山东地区燕山期基性脉岩、火山岩和碱性超基性脉岩进行了系统研究。
3.
Thus , the paper focuses on mineralogy , petrology , petrogeochemistry , isotopic chorology , and sr - nd - pb isotopes of the mafic intrusions and dikes in fujian province , se china . in addition , we also discussed the process of the plate subduction , mantle evolution , crust - mantle interaction , lithospheric thinning and extension , and the reaction for crustal extensi on in fujian province , se china . ( 1 ) daiqianshan mafic intrusion is situated along the changle - nanao fault , which intruded in the metamorphic rocks 基于此，本文以中国东南部福建省的基性脉岩、岩体为研究对象，运用系统的矿物学、岩石学、岩石地球化学、同位素地球化学及同位素年代学证据，详细论述了晚中生代中国东南部板块俯冲、地幔演化、壳幔相互作用及岩石圈伸展减薄的地球动力学过程，探讨了地壳拉张期次在福建省区域构造上的响应。
