Arid
DOI10.1016/j.gca.2016.06.001
Hawaiian imprint on dissolved Nd and Ra isotopes and rare earth elements in the central North Pacific: Local survey and seasonal variability
Froellje, Henning1; Pahnke, Katharina1; Schnetger, Bernhard2; Brumsack, Hans-Juergen2; Dulai, Henrietta3; Fitzsimmons, Jessica N.4,5
通讯作者Froellje, Henning
来源期刊GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN0016-7037
EISSN1872-9533
出版年2016
卷号189页码:110-131
英文摘要

Dissolved neodymium isotopes (Nd-143/Nd-144, expressed as epsilon(Nd)) and rare earth elements (REEs) have the potential to trace the provenance of lithogenic material as well as water masses. The central North Pacific is poorly investigated with respect to its Nd isotope signature and REE cycling, and little is known about the contributions of volcanic islands, such as Hawaii, relative to dust input from Asian deserts to the surface water REE budgets. Here we present dissolved Nd isotope and REE data along with long-lived radium isotope activities from Hawaii Ocean Time-Series Station ALOHA and coastal waters from Oahu, sampled for a GEOTRACES process study in February 2011. The data are supplemented with seasonal samples from ALOHA. Our results show a clear influence of the Hawaiian Islands on the coastal ocean and surface waters at ALOHA during February, expressed by higher surface water Ra activities, radiogenic surface epsilon(Nd) (epsilon(Nd) = +1.4 to -1.0), and elevated Eu anomalies (Eu/Eu* >= 1.3). Seasonal cycles of Asian dust deposition most likely contribute to the seasonal epsilon(Nd) variability of surface waters at ALOHA, as suggested by more negative epsilon(Nd) and the lack of Eu anomalies in summer. Neodymium isotopes in the intermediate and deep water column at ALOHA trace typical North Pacific water masses, such as North Pacific Intermediate Water and North Pacific Deep Water. We suggest that a radiogenic epsilon(Nd) excursion in 1000-2000 m water depth, observed in various North Pacific profiles, is controlled by advection of a modified Upper Circumpolar Deep Water or North Equatorial Pacific Intermediate Water. We further present an updated average epsilon(Nd) signature of -3.5 +/- 0.5 for North Pacific Deep Water and show that REE patterns of deep waters at ALOHA are dominantly controlled by vertical processes. (C) 2016 Elsevier Ltd. All rights reserved.


英文关键词Neodymium isotopes Rare earth elements GEOTRACES Dust North Pacific Hawaii HOT-ALOHA
类型Article
语种英语
国家Germany ; USA
收录类别SCI-E
WOS记录号WOS:000380753100007
WOS关键词SUBMARINE GROUNDWATER DISCHARGE ; CROSS-FLOW FILTRATION ; PAST OCEAN CIRCULATION ; SERIES STATION ALOHA ; EASTERN INDIAN-OCEAN ; INTERMEDIATE WATER ; NEODYMIUM ISOTOPES ; GEOTRACES INTERCALIBRATION ; TEMPORAL VARIABILITY ; SR-87/SR-86 RATIOS
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/193171
作者单位1.Carl von Ossietzky Univ Oldenburg, Max Planck Res Grp Marine Isotope Geochem, Inst Chem & Biol Marine Environm ICBM, Carl von Ossietzky Str 9-11, D-26129 Oldenburg, Germany;
2.Carl von Ossietzky Univ Oldenburg, Microbiogeochem, Inst Chem & Biol Marine Environm ICBM, Carl von Ossietzky Str 9-11, D-26129 Oldenburg, Germany;
3.Univ Hawaii, Sch Ocean & Earth Sci & Technol, Dept Geol & Geophys, 1680 East West Rd, Honolulu, HI 96822 USA;
4.MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA;
5.Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA
推荐引用方式
GB/T 7714
Froellje, Henning,Pahnke, Katharina,Schnetger, Bernhard,et al. Hawaiian imprint on dissolved Nd and Ra isotopes and rare earth elements in the central North Pacific: Local survey and seasonal variability[J],2016,189:110-131.
APA Froellje, Henning,Pahnke, Katharina,Schnetger, Bernhard,Brumsack, Hans-Juergen,Dulai, Henrietta,&Fitzsimmons, Jessica N..(2016).Hawaiian imprint on dissolved Nd and Ra isotopes and rare earth elements in the central North Pacific: Local survey and seasonal variability.GEOCHIMICA ET COSMOCHIMICA ACTA,189,110-131.
MLA Froellje, Henning,et al."Hawaiian imprint on dissolved Nd and Ra isotopes and rare earth elements in the central North Pacific: Local survey and seasonal variability".GEOCHIMICA ET COSMOCHIMICA ACTA 189(2016):110-131.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Froellje, Henning]的文章
[Pahnke, Katharina]的文章
[Schnetger, Bernhard]的文章
百度学术
百度学术中相似的文章
[Froellje, Henning]的文章
[Pahnke, Katharina]的文章
[Schnetger, Bernhard]的文章
必应学术
必应学术中相似的文章
[Froellje, Henning]的文章
[Pahnke, Katharina]的文章
[Schnetger, Bernhard]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。