Widespread tephra layers in the Bering Sea sediments: distal clues to large explosive eruptions from the Aleutian volcanic arc

doi:10.1007/s00445-018-1254-9

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋地质与地球物理研究室

	Widespread tephra layers in the Bering Sea sediments: distal clues to large explosive eruptions from the Aleutian volcanic arc
	Derkachev, A. N.1; Ponomareva, V. V.2; Portnyagin, M. V.3,4; Gorbarenko, S. A.1; Nikolaeva, N. A.1; Malakhov, M. I.5; Zelenin, E. A.6; Nuernberg, D.3; Liu, Yanguang 7
刊名	BULLETIN OF VOLCANOLOGY
	2018-11
卷号	80 期号:11
关键词	North Pacific Late Quaternary Marine tephrochronology Volcanic glass chemistry Electron microprobe LA-ICP-MS
ISSN号	0258-8900
DOI	10.1007/s00445-018-1254-9
英文摘要	Tephra layers within marine sediments provide information on past explosive eruptions, which is especially important in the case of remote island arcs where data on proximal pyroclastic deposits can be scarce. Three Alaska-Aleutian tephras (labeled Br2, SR2, and SR4) were found in the late Pleistocene-Holocene sediments of the Bering Sea (north Pacific). We fingerprint glass from these tephras with the help of single-shard electron microprobe and LA-ICP-MS analyses and provide microprobe data on minerals from two of these tephras. The large compositional variability of the Alaska-Aleutian volcanoes permits the use of ratios of highly incompatible trace elements (Ba/Nb, Th/Nb, Th/La, La/Nb) for identification of distal tephra sources by comparison of these ratios in tephra glass and proximal bulk rock analyses. This method, along with mapped tephra dispersal, has allowed us to link tephras under study to Aniakchak, Semisopochnoi, and Okmok volcanoes, respectively. Our results indicate that tephra Br2 was derived from the 3.6ka Aniakchak II caldera-forming eruption (Alaska, USA). This is the first ever finding of the Aniakchak II tephra in Bering Sea sediments, which permits enlargement of its tephra volume and eruption magnitude to 100km(3) and 6.8, respectively. Tephra SR2, dated at 12.2ka, is likely associated with a post-glacial caldera on the Semisopochnoi Island, Aleutians (USA). Tephra SR4 (dated at 64.5ka), likely was derived from an earlier undocumented eruption from Okmok volcano (Aleutians). All three regionally spread tephra layers are valuable isochrones, which can be used for correlating and dating of Bering Sea sediments.
资助项目	Russian Science Foundation[16-17-10035]
WOS研究方向	Geology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000448810500001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/2776]
专题	业务部门_海洋地质与地球物理研究室
作者单位	1.VI Ilichev Pacific Oceanol Inst, 43 Baltiyskaya St, Vladivostok 690041, Russia; 2.Inst Volcanol & Seismol, Piip Blvd 9, Petropavlovsk Kamchatski 683006, Russia; 3.GEOMAR Helmholtz Ctr, Ocean Res Kiel, Wischhofstr 1-3, D-24148 Kiel, Germany; 4.VI Vernadsky Inst Geochem & Analyt Chem, Kosygin St 19, Moscow 119991, Russia; 5.North East Interdisciplinary Sci Res Inst, Portovaya St 16, Magadan 685000, Russia; 6.Geol Inst, Pyzhevsky Lane 7, Moscow 119017, Russia; 7.SOA, Inst Oceanog 1, Xian Xia Ling Rd 6, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Derkachev, A. N.,Ponomareva, V. V.,Portnyagin, M. V.,et al. Widespread tephra layers in the Bering Sea sediments: distal clues to large explosive eruptions from the Aleutian volcanic arc[J]. BULLETIN OF VOLCANOLOGY,2018,80(11).
APA	Derkachev, A. N..,Ponomareva, V. V..,Portnyagin, M. V..,Gorbarenko, S. A..,Nikolaeva, N. A..,...&Liu, Yanguang.(2018).Widespread tephra layers in the Bering Sea sediments: distal clues to large explosive eruptions from the Aleutian volcanic arc.BULLETIN OF VOLCANOLOGY,80(11).
MLA	Derkachev, A. N.,et al."Widespread tephra layers in the Bering Sea sediments: distal clues to large explosive eruptions from the Aleutian volcanic arc".BULLETIN OF VOLCANOLOGY 80.11(2018).