气候变化领域集成服务门户(CCPortal): Full-Vector Paleosecular Variation Curve for the Azores: Enabling Reliable Paleomagnetic Dating for the Past 2 kyr

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DOI	10.1029/2020JB019745
	Full-Vector Paleosecular Variation Curve for the Azores: Enabling Reliable Paleomagnetic Dating for the Past 2 kyr
	Béguin A.; Pimentel A.; de Groot L.V.
发表日期	2021
ISSN	21699313
卷号	126 期号:2
英文摘要	For archeomagnetic dating, high-quality directional and intensity paleosecular variation curves are needed. The Azores Archipelago in the mid-Atlantic Ocean provides a wealth of volcanic products erupted during the Holocene, making it an ideal location to (1) gather paleomagnetic data from well dated lava flows and (2) construct a paleosecular variation (PSV) curve that enables paleomagnetic dating of volcanic products with unknown age. Here, we present new full-vector paleomagnetic data from Pico Island, and combine the new data with existing data from neighboring islands to construct a new full-vector PSV curve for the Azores Archipelago. An extensive rock-magnetic study underpins the quality of our paleomagnetic carriers. From Pico Island, we obtained 21 new mean site directions; and 15 paleointensity estimates with the multimethod paleointensity approach from 12 sites, the age was known for 14 and 10 sites, respectively. By bootstrapping the non-Gaussian uncertainty estimates of the radiocarbon age calibrations and the confidence intervals associated with the direction and paleointensity estimates, we produce the first full-vector PSV curve with confidence intervals for the Azores covering the past 2 kyr. The PSV curve reveals a period of low inclination between ∼900 and 1560 AD, with minimum values of 32°. The potential of our new full-vector PSV curve is demonstrated by successfully dating five lava flows from Pico Island. © 2020. The Authors.
英文关键词	archeomagnetic dating; paleointensity; paleomagnetic secular variation; paleomagnetism
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187347
作者单位	Paleomagnetic Laboratory Fort Hoofddijk, Utrecht University, Utrecht, Netherlands; Centre for Information and Seismovolcanic Surveillance of the Azores (CIVISA), Ponta Delgada, Portugal; Research Institute for Volcanology and Risk Assessment (IVAR), University of the Azores, Ponta Delgada, Portugal; Research Centre in Biodiversity and Genetic Resources (CIBIO), InBIO Associate Laboratory, Pole of the Azores, Ponta Delgada, Portugal
推荐引用方式 GB/T 7714	Béguin A.,Pimentel A.,de Groot L.V.. Full-Vector Paleosecular Variation Curve for the Azores: Enabling Reliable Paleomagnetic Dating for the Past 2 kyr[J],2021,126(2).
APA	Béguin A.,Pimentel A.,&de Groot L.V..(2021).Full-Vector Paleosecular Variation Curve for the Azores: Enabling Reliable Paleomagnetic Dating for the Past 2 kyr.Journal of Geophysical Research: Solid Earth,126(2).
MLA	Béguin A.,et al."Full-Vector Paleosecular Variation Curve for the Azores: Enabling Reliable Paleomagnetic Dating for the Past 2 kyr".Journal of Geophysical Research: Solid Earth 126.2(2021).