辽西新台门白垩纪火山岩~(40)Ar/~(39)Ar定年及其对蝾螈化石层时代的约束

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	辽西新台门白垩纪火山岩~(40)Ar/~(39)Ar定年及其对蝾螈化石层时代的约束; Ar-40/Ar-39 dating of volcanic rocks and constraints for stratum age of Xintaimen area in western Liaoning
	孙荣双 ; 季建清 ; 高克勤 ; 张越 ; 周晶 ; 马芳 ; 徐芹芹
刊名	岩石学报
	2010
关键词	火山岩 40Ar/39Ar年代学早白垩纪辽西新台门 Volcanic rocks Ar-40/Ar-39 Dating Early Cretaceous Xintaimen western Liaoning
英文摘要	富含热河生物群鸟类和恐龙化石的辽西白垩纪地层属于中生代陆相火山沉积,其不同区域之间的地层对比和时代归属一直存有较大争议。本文采用激光40Ar/39Ar年代学方法,对葫芦岛新台门地区一个实测剖面中蝾螈化石点下伏的两层火山岩夹层进行了年代学研究。通过地层中火山岩夹层及火山岩颈的年代学测定,获得6组激光40Ar/39Ar年代结果。其中,下部层位中的流纹岩和安山质玄武岩样品XTM-3、XTM-5年龄结果分别为94.2±1.3Ma、93.7±1.3Ma;作为这一期喷发晚期就位的火山岩颈样品XTM-7的年龄结果为92.8±0.4Ma;而上部层位的安山岩和安山玄武岩火山岩夹层样品XTM-6、XTM-8、XT...; Mesozoic deposits in western Liaoning were celebrated for yielding abundant bird and feathered dinosaur fossils of the Jehol Biota The age and stratigraphic correlations of the fossil beds in different areas and horizons, however, have been constantly in dispute Results of laser Ar-40/Ar-39 dating of two sets of volcanic rock samples are presented in the paper to determine the age and stratigraphic sequence of the salamander fossil beds exposed near Xintaimen Huludao City, western Liaoning The rock samples XTM 3, XTM-5 from the lower part of the measured section were dated as 94 2 +/- 1 3Ma 93 7 +/- 1 3Ma respectively The rock sample XTM 7 was dated as 92 8 +/- 0 4Ma, representing the sampling of a volcanic neck emplaced during the late stage of the eruption Additional samples of XTM 6, XTM 8 and XTM-9 from the upper part of the section were dated as 110 1 +/- 1 0Ma, 110 9 +/- 0 5Ma and 93 7 +/- 1 2Ma, respectively In order to validate the dating results, we test another sample XTM 9 2, which locates at the fossil point below the sample XTM 9 The dating results indicate that at least two separate eruption events can he recognized in Xintaimen area, with an early eruption at about 110Ma and a later one at 93Ma According to the dating results, the salamander fossil bed at Xintaimen should be a counterpart of the Lower Cretaceous Jiufotang Formation or the Fuxin Formation, representing the highest salamander bearing horizon ever known in the Mesozoic of northern China; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000285033000020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 1; 11; 3397-3410; 26
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/50061]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	孙荣双,季建清,高克勤,等. 辽西新台门白垩纪火山岩~(40)Ar/~(39)Ar定年及其对蝾螈化石层时代的约束, Ar-40/Ar-39 dating of volcanic rocks and constraints for stratum age of Xintaimen area in western Liaoning[J]. 岩石学报,2010.
APA	孙荣双.,季建清.,高克勤.,张越.,周晶.,...&徐芹芹.(2010).辽西新台门白垩纪火山岩~(40)Ar/~(39)Ar定年及其对蝾螈化石层时代的约束.岩石学报.
MLA	孙荣双,et al."辽西新台门白垩纪火山岩~(40)Ar/~(39)Ar定年及其对蝾螈化石层时代的约束".岩石学报 (2010).