北部湾涠洲岛南湾火山砂岩捕虏体光释光(OSL)测年结果

地震地质 ›› 2006, Vol. 28 ›› Issue (1): 139-141.

北部湾涠洲岛南湾火山砂岩捕虏体光释光(OSL)测年结果

樊祺诚¹, 孙谦¹, 王旭龙², 尹功明¹, 龙安明³, 尹克坚³

1. 中国地震局地质研究所, 北京, 100029;
2. 中国科学院地球环境研究所, 西安, 710075;
3. 广西壮族自治区地震局, 南宁, 530022

收稿日期:2006-01-11 修回日期:2006-02-05 出版日期:2006-03-09 发布日期:2009-08-27
作者简介:樊祺诚,男,1948年生,1975年毕业于南京大学地质系,1982年在中国科学技术大学研究生院获得硕士学位,研究员,从事火山与地球内部物质研究,电话:010-62009017,E-mail:fqc@ies.ac.cn.
基金资助:
国家自然科学基金(40572044);广西科学研究与技术开发项目(03220221)资助。

OSL DATING OF A SANDSTONE XENOLITH IN THE VOLCANIC ROCKS OF THE NANWAN VOLCANO, WEIZHOU ISLAND, BEIBU BAY

FAN Qi-cheng¹, SUN Qian¹, WANG Xu-long², YIN Gong-ming¹, LONG An-ming³, YIN Ke-jian³

1. Institute of Geology, China Earthquake Administration, Beijing 100029, China;
2. Institute of Earth Environment, Xi’an 710075, China;
3. Earthquake Administration of Guangxi Zhuang Autonomous Region, Nanning 530022, China

Received:2006-01-11 Revised:2006-02-05 Online:2006-03-09 Published:2009-08-27

摘要/Abstract

摘要： 涠洲岛是北部湾内的一座火山岛,火山活动初步可以分为早-中更新世和晚更新世2期。晚期南湾火山是典型的射气岩浆喷发成因的火山,文中报道了南湾火山的上、下2层火山碎屑岩中砂岩捕虏体的光释光(OSL)测年结果,提出南湾火山喷发时代为距今约3万年左右的晚更新世末期。

关键词: 北部湾涠洲岛, 南湾火山, 砂岩捕虏体, 光释光(OSL)测年

Abstract: The Weizhou Island is a volcanic island in the Beibu Bay. Volcanic activity on the island can be roughly divided into two stages, mainly in the Early-Middle Pleistocene and the Late Pleistocene separately. Eruptions of the Nanwan Volcano (late stage activity of Weizhou Volcanic Province) were typical phreatomagmatic eruptions, forming a big maar and thick ring walls of pyroclastics and debris. In this paper, we reported the OSL dating result of the sandstone xenoliths, which were trapped in the two volcanic pyroclastic layers of the Nanwan Volcano. The ages revealed that the activity of the Nanwan Volcano mainly occurred in ca 30ka ago, at the end of the Late Pleistocene.

Key words: the Beibu Bay, Nanwan Volcano, sandstone xenolith, OSL dating

中图分类号:

P317.3

樊祺诚, 孙谦, 王旭龙, 尹功明, 龙安明, 尹克坚. 北部湾涠洲岛南湾火山砂岩捕虏体光释光(OSL)测年结果[J]. 地震地质, 2006, 28(1): 139-141.

FAN Qi-cheng, SUN Qian, WANG Xu-long, YIN Gong-ming, LONG An-ming, YIN Ke-jian. OSL DATING OF A SANDSTONE XENOLITH IN THE VOLCANIC ROCKS OF THE NANWAN VOLCANO, WEIZHOU ISLAND, BEIBU BAY[J]. SEISMOLOGY AND GEOLOGY, 2006, 28(1): 139-141.

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