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isotopic dating age
相关语句
  相似匹配句对
     ISOTOPIC DATING FOR METALLIC DEPOSITS AND ITS SIGNIFICANCE
     金属矿床同位素精确定年的方法和意义
短句来源
     Isotopic Dating of the Nyainqentanglha Granite and Its Significance
     念青唐古拉花岗岩的同位素年龄测定及其地质意义
短句来源
     Dating for Children
     子女相亲,父母代劳(英文)
短句来源
     Optical dating
     激光断代
短句来源
     the isotopic method;
     古地磁法;
短句来源
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The numerous isotopic dating data from the metamorphic rocks in Northern Fujian are a great helpto the study of the geological chronology and basic geology in the area.The author expounded herein thefact that different isotopic dating methods have their different application and limitation after studying anumber of isotopic dating data from the metamorphic rocks in Northern Fujian.Although there is thecontradiction between some uncertain isotopic ages and geological data,the further exploration of geolo-gy mustn't...

The numerous isotopic dating data from the metamorphic rocks in Northern Fujian are a great helpto the study of the geological chronology and basic geology in the area.The author expounded herein thefact that different isotopic dating methods have their different application and limitation after studying anumber of isotopic dating data from the metamorphic rocks in Northern Fujian.Although there is thecontradiction between some uncertain isotopic ages and geological data,the further exploration of geolo-gy mustn't be abandoned or interrupted,and the geological implication of some unreal isotopic agesmustn't be exaggerated unsuitably.Therefore,the data of isotopic dating age and geologic implication ofthe isotopic samples must be carefully selected and discriminated so as to collect more available informa-tion and manage to seek after more geological evidence.

通过闽北变质岩中的大量同位素测年数据的评述,进一步阐明不同的同位素测年方法都具有各自的适用性和局限性。本文认为,不必因为某些不确切的同位素年龄与地质资料产生矛盾而放弃或中止地质上进一步探索,甚至不适当地夸大某些非真实年龄的地质意义,应仔细地剔除辨析测年数据及其样品的地质含义,扬长避短,以提取更多可利用的信息并努力寻求地质依据。

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,...

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.

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。

 
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