| 陈振胜,张理刚,刘敬秀,王炳成,徐金方,郑文深.胶东区域岩石铅同位素地球化学背景研究[J].地质找矿论丛,1994,(1):65-78 |
| 胶东区域岩石铅同位素地球化学背景研究 |
| A STUDY ON LEAD ISOTOPE GEOCHEMICAL BACKGROUNDS OF GEOLOGICAL BODIES IN JIAODONG REGION |
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| DOI：10.6053/j.issn.1001-1412.1994.1. 008 |
| 中文关键词: 铅同位素 铅构造模式 胶东区域 |
| 英文关键词: |
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| 中文摘要: |
| 通过对胶东地区与金矿有关的地层、中基性脉岩、花岗岩以及碱性玄武岩的铅同位素地球化学背景的研究和对比,给出区域各主要地质体的铅同位素组成值域。应用华北铅构造模式图,论证了区域花岗岩主要源于胶东群变质岩。其中形成于中生代的与成矿有主要关系的花岗岩(郭家岭式花岗岩和滦家河式花岗岩)及中基性脉岩主要是胶东群重熔结晶分异的产物,而前中生代的某些花岗岩则为胶东群交代混合岩化的产物。区域碱性玄武岩由华南地幔向北下插后喷发形成。 |
| 英文摘要: |
| Through study and comparison on lead isotope geochemical backgrounds of strata,intermediate-basic dikes,granitoids and alkalibasalts with which gold mineralizations are associated in jiaodong region,the value ranges of lead isotope compositions of each kind of main geological bodies in this region are given. Using plumbotectonics of northern China, we point out that regional granitoids are dominantly stemed from Jiaodong Group metamorphic rocks,Mesozoic granitoids and intermediate-basic dikes associated with gold mineralization are probably the products of remelting and crystallization-differentiation of Jiaodong Group, while some of the pre-Mesozoic granitoids are the products of migmatization of the Jiaodong Group Alkali-basalt in this area formed from southern China mantle by eruptiong after inserting down toward northern China plate. |
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