A Natural Experiment to Examine Hafnium Mobility in Subduction Zones
检查俯冲带铪迁移率的自然实验
基本信息
- 批准号:0440302
- 负责人:
- 金额:$ 11.43万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2005
- 资助国家:美国
- 起止时间:2005-01-01 至 2006-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project is designed to use the central Aleutian arc as a natural experiment to examine the influence that melts of terrigenous turbidites has upon the abundances of high field strength elements (HFSE) and Hf isotopic compositions in arc lavas. The Amlia Fracture Zone (AFZ) contains sediment in greater volume than elsewhere in the Aleutian trench and delivers anomalous quantities of sediment and water directly to the mantle. Oblique subduction of the Pacific plate has moved the AFZ westward along the arc front, sequentially subducting a pulse of sediment and fluid beneath the islands of Chuginadak, Yunaska and Seguam circa 5, 2.5 and 1 million years ago, respectively. Lavas from Atka Island, which has not yet received the sediment and fluid spike from the AFZ provides control compositions. This section of the Aleutians was selected because Sr and Pb isotopic compositions are markedly more radiogenic at Seguam and Yunaska volcanoes than at Atka. This study proposes to examine the variation of HFSE and Hf isotopic compositions in fifteen lavas from these islands to test whether a pulse of sediment in the magma source, delivered by a subducted fracture zone, affected these lavas. Because this sediment addition occurred as a spatially and temporally discrete spike, temporal variation in the hafnium characteristics of the lavas constrains the duration of HFSE transfer to arc magmas. Because the ages and petrogenesis of several of the volcanic complexes in the Aleutians has never been investigated, this project will contribute significantly to the understanding of this active arc. This project will establish the research program of the PI at KSU, where the PI provides a role model for women students. The project will support the graduate training of Ms. Katrina Pekar and partially support that of Mr. David Bridges. The project will foster national and international collaborations between the KSU geology department and other institutions. An important aspect of these collaborations includes training graduate students in the use of analytical techniques not currently available at KSU (ICP-MS) or in the state of Kansas (40Ar/39Ar geochronology, isotope analysis by MC-ICPMS and TIMS). The results of the study will be shared with the geologic community through national meetings, manuscript publication and archive on the Aleutian Arc Data System.
本项目旨在利用阿留申岛弧中部作为一个自然实验,研究陆源浊积岩熔体对岛弧熔岩中高场强元素(HFSE)丰度和Hf同位素组成的影响。 Amlia断裂带(AFZ)包含的沉积物比阿留申海沟的其他地方更大,并将异常数量的沉积物和水直接输送到地幔。太平洋板块的斜向俯冲使AFZ沿弧前向西沿着,分别在大约500万年前、250万年前和100万年前相继在丘吉纳达克岛、尤纳斯卡岛和塞古姆岛下方俯冲沉积物和流体。来自Atka岛的Lavas(其尚未接受来自AFZ的沉积物和流体掺加)提供对照组合物。这一部分的阿留申群岛被选中,因为Sr和Pb同位素组成显着更放射性的Seguam和Yunaska火山比在阿特卡。本研究建议检查HFSE和Hf同位素组成的变化,从这些岛屿的15个熔岩,以测试是否在岩浆源的沉积物的脉冲,交付的俯冲断裂带,影响这些熔岩。由于这种沉积物除了发生在空间和时间上离散的尖峰,铪特性的熔岩的时间变化限制了HFSE转移到弧岩浆的持续时间。由于阿留申群岛中几个火山杂岩的年龄和岩石成因从未被研究过,因此该项目将大大有助于了解这一活动弧。该项目将在堪萨斯州立大学建立PI研究方案,PI为女学生提供榜样。 该项目将支持Katrina Pekar女士的研究生培训,并部分支持大卫布里奇斯先生的培训。该项目将促进KSU地质部门和其他机构之间的国家和国际合作。 这些合作的一个重要方面包括培训研究生使用目前在堪萨斯州立大学(ICP-MS)或堪萨斯州(40 Ar/39 Ar地质年代学,MC-ICPMS和TIMS的同位素分析)无法获得的分析技术。研究结果将通过国家会议、手稿出版物和阿留申弧数据系统档案与地质界分享。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Kirsten Nicolaysen其他文献
Temporal geochemical trends in Kerguelen Archipelago basalts: evidence for decreasing magma supply from the Kerguelen Plume
凯尔盖朗群岛玄武岩的时间地球化学趋势:凯尔盖朗羽流岩浆供应减少的证据
- DOI:
- 发表时间:
2000 - 期刊:
- 影响因子:0
- 作者:
F. Frey;D. Weis;H. Yang;Kirsten Nicolaysen;H. Leyrit;A. Giret - 通讯作者:
A. Giret
The Val Gabbro Plutonic Suite: A Sub-volcanic Intrusion Emplaced at the End of Flood Basalt Volcanism on the Kerguelen Archipelago
瓦尔加布罗冥王星组:凯尔盖朗群岛洪水玄武岩火山活动结束时的次火山侵入
- DOI:
10.1093/petrology/egm071 - 发表时间:
2008 - 期刊:
- 影响因子:0
- 作者:
J. Scoates;D. Weis;Matthias Franssens;N. Mattielli;Heidi Annell;F. Frey;Kirsten Nicolaysen;A. Giret - 通讯作者:
A. Giret
The Cretaceous to recent history of the southeastern Indian Ocean : the role of mantle plumes examined by geochronology and Sr, Nd, Pb and He isotopic geochemistry
东南印度洋白垩纪到近代历史:通过地质年代学和 Sr、Nd、Pb 和 He 同位素地球化学研究地幔柱的作用
- DOI:
- 发表时间:
2001 - 期刊:
- 影响因子:0
- 作者:
Kirsten Nicolaysen - 通讯作者:
Kirsten Nicolaysen
An intercontinental correlation of the mid-Neoproterozoic Eastern Indian tectonic zone: evidence from the gneissic clasts in Elan Bank conglomerate, Kerguelen Plateau
新元古代中期东印度构造带的洲际对比:来自凯尔盖朗高原埃兰滩砾岩片麻岩碎屑的证据
- DOI:
10.1007/s00410-011-0699-z - 发表时间:
2012 - 期刊:
- 影响因子:3.5
- 作者:
N. Chatterjee;Kirsten Nicolaysen - 通讯作者:
Kirsten Nicolaysen
ORIGIN OF THE LATE EOCENE ESHAMY SUITE GRANITOIDS IN WESTERN PRINCE WILLIAM SOUND, ALASKA
阿拉斯加威廉王子湾西部始新世晚期埃沙米系列花岗岩的起源
- DOI:
- 发表时间:
2012 - 期刊:
- 影响因子:0
- 作者:
Kirsten Nicolaysen - 通讯作者:
Kirsten Nicolaysen
Kirsten Nicolaysen的其他文献
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{{ truncateString('Kirsten Nicolaysen', 18)}}的其他基金
Collaborative Research: Geological Hazards, Climate Change, and Human/ Ecosystems Resilience in the Islands of the Four Mountains, Alaska
合作研究:阿拉斯加四山群岛的地质灾害、气候变化和人类/生态系统复原力
- 批准号:
1301925 - 财政年份:2013
- 资助金额:
$ 11.43万 - 项目类别:
Standard Grant
SGER: A Proposed SGER Survey of the Age and Geochemical Compositions of Mt. Cleveland; An Unstudied, Active Volcano of the Central Aleutian Arc
SGER:拟议的克利夫兰山年龄和地球化学成分 SGER 调查;
- 批准号:
0236326 - 财政年份:2002
- 资助金额:
$ 11.43万 - 项目类别:
Standard Grant
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