Sedimentary response to volcanic activity in the Okinawa Trough since the last deglaciation

doi:10.1007/s00343-010-9272-2

IOCAS-IR > 海洋地质与环境重点实验室

	Sedimentary response to volcanic activity in the Okinawa Trough since the last deglaciation
	Jiang Fuqing; Li Anchun; Li Tiegang
	2010
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
卷号	28 期号:1 页码:171-182
文章类型	Article
摘要	To investigate the relationship between volcanic activity and sediment record on regional and temporal scales, 158 surface sediment samples were collected from the East China Sea Shelf to the northern Okinawa Trough (OT), and two cores recovered in the northern and southern OT, respectively. Mineralogy, grain-size, and geochemical analyses of those samples show that: 1) volcanic glass, volcanic-type pyroxene, hypersthenes, and magnetite increase in sediment influenced by volcanic activity; 2) sediment grain sizes (and also silt content) increase in ash layers; and 3) the contents of Na(2)O and Zr are higher, while terrigenous elements, e. g., TFe(2)O(3) and K(2)O, and biogenous compositions, e. g., CaO and Sr, are relatively lower in ash layers than those of non-ash layers. The distribution of volcanic ash has three distinguishing characteristics: 1) volcanic ash is more abundant in the northern and central OT than the southern OT; 2) volcanic ash increases from continental shelf to the trough; 3) the sediment during the last 12 000 a suggests stronger volcanic events than during 15 000-12 000 a. The eruptive locations, frequency, and volume of calderas are among the most important factors controlling the distributions of volcanic ash. In addition, the main Kuroshio warm current that extends northward probably impeded the diffusion of volcanic ash to the west and south in the OT. However, a southward current probably carried some volcanic ash toward southern OT.
关键词	Sediment Ash Layer Last Deglaciation Okinawa Trough
DOI	10.1007/s00343-010-9272-2
收录类别	SCI
语种	英语
WOS记录号	WOS:000275654100022
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/32786
专题	海洋地质与环境重点实验室
作者单位	Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Jiang Fuqing,Li Anchun,Li Tiegang. Sedimentary response to volcanic activity in the Okinawa Trough since the last deglaciation[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2010,28(1):171-182.
APA	Jiang Fuqing,Li Anchun,&Li Tiegang.(2010).Sedimentary response to volcanic activity in the Okinawa Trough since the last deglaciation.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,28(1),171-182.
MLA	Jiang Fuqing,et al."Sedimentary response to volcanic activity in the Okinawa Trough since the last deglaciation".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 28.1(2010):171-182.

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