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
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume28Issue:1Pages:171-182
SubtypeArticle
AbstractTo 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.
KeywordSediment Ash Layer Last Deglaciation Okinawa Trough
DOI10.1007/s00343-010-9272-2
Indexed BySCI
Language英语
WOS IDWOS:000275654100022
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/32786
Collection海洋地质与环境重点实验室
AffiliationChinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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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