琼北火山岩激光40Ar/39Ar定年研究

CORC > 北京大学 > 地球与空间科学学院

	琼北火山岩激光40Ar/39Ar定年研究; High-precision Laser 40Ar/39Ar dating of Qiongbei volcanic rocks.
	洒骁 ; 季建清 ; 周晶
刊名	岩石学报
	2013
关键词	40Ar/39Ar年代学琼北火山岩 Ar丢失与过剩 40Ar/39Ar Dating Qiongbei volcanic rocks Inherited 40Ar Ar-40/Ar-39 Dating Qiongbei volcanic rocks Inherited Ar-40
英文摘要	新生代以来,雷琼地区多次、大量地喷发了一系列火山岩.前人主要基于K-Ar法对此划分了期次.本文采用激光40Ar/39 Ar年代学方法,对琼北火山岩区进行了精细定年研究.低本底激光40Ar/39Ar法能够对低钾含量,极少量样品(毫克级)进行精细测定,非常适合极年轻火山岩的定年工作.结果显示的火山岩激光40Ar/39Ar法高质量数据表明琼北火山喷发活动时限跨越1.3 ～0.052Ma.在比较了表现年龄与等时线年龄差异之后,本文给出了年龄推荐值.正如测试数据所显示,本地区新生代火山岩普遍存在40Ar和36Ar过剩的问题,此时只有等时线年龄才代表喷发的真实年龄.; Since Late Cenozoic era, volcanic rocks have been frequently and massively erupted in the Leiqiong area. Those volcanic rocks, on the basis of K-Ar dating method, are divided to several volcanic phases. In this paper, laser Ar-40/Ar-39 dating method is used to test and calculate the accurate time of volcanic rocks in Qiongbei area. The high quality data result by laser Ar-40/Ar-39 dating method shows that the time spans of eruption of Qiongbei volcanoes are around 1.3 similar to 0.052Ma. Considering the differences between the apparent ages and the isochron ages, a series of ages are recommended. As shown as the data, there are widespread inherited Ar-40* and Ar-36 excess in the Cenozoic volcanic rocks, then the isochorn ages are more recommended to be the real ages of the eruptions.; 中国地质调查局地质调查项目; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000323689100014&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; 8; 2789-2795; 29
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/221549]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	洒骁,季建清,周晶. 琼北火山岩激光40Ar/39Ar定年研究, High-precision Laser 40Ar/39Ar dating of Qiongbei volcanic rocks.[J]. 岩石学报,2013.
APA	洒骁,季建清,&周晶.(2013).琼北火山岩激光40Ar/39Ar定年研究.岩石学报.
MLA	洒骁,et al."琼北火山岩激光40Ar/39Ar定年研究".岩石学报 (2013).