Harrats Volcanic Activity and Evolution of the Lithosphere-Asthenosphere Boundary beneath Western Saudi Arabia
哈拉茨火山活动和沙特阿拉伯西部岩石圈-软流圈边界的演化
基本信息
- 批准号:1524675
- 负责人:
- 金额:$ 18万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2015
- 资助国家:美国
- 起止时间:2015-08-15 至 2019-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project looks at the causes of volcanic activity within an enigmatic region of the Arabian Peninsula in Saudi Arabia. This region, known as the Makkah-Madinah-Nafud line (MMN) is a series of small to moderate size volcanic fields (known as 'harrats') that extend north from the Read Sea in Saudi Arabia, Jordan and Syria. Volcanism in this region has occurred in Neogene to recent times, with the oldest activity occurring starting more than 10 million years ago and the youngest occurred in 1256 (an eruption that threatened the culturally important city of Madinah. This project seeks to investigate the ultimate causes of the magmatic activity that lead to volcanism by use of geochronological, geochemical and petrological studies of erupted lavas. The team is specifically interested in the role of the continental lithosphere (the upper rigid portion of the mantle that directly underlies the crust) and asthenosphere (the underlying hotter portion of the mantle that convects) in producing erupted magmas and how these two regions might vary through time and space. The results of the study will have important implications for the tectonic development of this region and for the hazards represented by volcanic activity.The Saudi Arabian harrats are extensive Neogene to recent continental volcanic fields located in western portion of the Arabian Peninsula. Although most workers agree that Harrat volcanism is related to extension and sea floor spreading in the Red Sea in some way, the actual causes of magmatism remain uncertain. The key issues that this team will address via the study of selected harrats are: (i) the role of asthenosphere vs. lithosphere in the production of continental magmas; (ii) whether systematic changes in the depth and extent of melting occur in space and time, and the relation of these changes to geodynamic setting; and (iii) the potential role of mantle plume material in harrat volcanism. Little modern geochemical, petrological or geochronological study has been made of these areas. Thus their primary focus is to obtain 40Ar-39Ar ages, major and trace element concentrations, Sr-Nd-Pb-He isotope compositions and data for melt inclusions for well dated and representative samples suites from selected harrats that represent a ESE-WNW traverse across the north-south trending Makkah-Madinah-Nafud (MMN) volcanic line. They will also use a range of geochemical modeling techniques to investigate the conditions and sources of magmas along their traverse, and to study temporal changes in melting processes. The researchers' ultimate goal is to provide data that can allow harrat volcanism to be better understood in terms of broader geodynamic evolution of the Afro-Arabian region.
这个项目着眼于沙特阿拉伯阿拉伯半岛一个神秘地区内火山活动的原因。这一地区被称为麦加-麦地那-纳夫德线(MMN),是一系列从沙特阿拉伯、约旦和叙利亚的里德海向北延伸的中小型火山田(被称为哈拉特)。该地区的火山活动发生在新近纪,最古老的火山活动始于1000多万年前,最年轻的火山活动发生在1256年(一次火山喷发威胁到重要的文化城市麦地那)。该项目寻求通过对喷发的熔岩进行地质年代学、地球化学和岩石学研究来调查导致火山活动的岩浆活动的根本原因。该团队特别感兴趣的是大陆岩石圈(直接位于地壳下方的地幔的上部刚性部分)和软流圈(地幔下面较热的对流部分)在产生喷发岩浆方面的作用,以及这两个地区可能如何随时间和空间变化。研究结果将对该地区的构造发展和火山活动所代表的灾害具有重要的意义。沙特阿拉伯哈拉特地区是位于阿拉伯半岛西部的广泛的新近纪至现代大陆火山岩田。尽管大多数工作人员一致认为,哈拉特火山活动在某种程度上与红海的伸展和海底扩张有关,但岩浆作用的实际原因仍然不确定。该小组将通过对选定的Harrat的研究解决的关键问题是:(I)软流圈与岩石圈在大陆岩浆产生中的作用;(Ii)熔融深度和程度是否在空间和时间上发生系统变化,以及这些变化与地球动力学环境的关系;以及(Iii)地幔羽流物质在Harrat火山活动中的潜在作用。对这些地区的现代地球化学、岩石学或地质年代学研究甚少。因此,他们的主要关注点是从代表ESE-WNW横跨Makkah-Madinah-Nafud(MMN)火山线的选定HARRAT中获得40Ar-39Ar年龄、主量元素和微量元素浓度、锶-钕-铅-氦同位素组成和熔体包裹体数据。他们还将使用一系列地球化学模拟技术来调查沿其横贯的岩浆的条件和来源,并研究熔融过程中的时间变化。研究人员的最终目标是提供数据,使人们能够更好地从非洲-阿拉伯地区更广泛的地球动力学演化角度理解哈拉特火山作用。
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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Adam Kent其他文献
Did the Hiawatha Light Rail Line Increase Single-Family Residential Property Values ?
海华沙轻轨线是否增加了单户住宅的房产价值?
- DOI:
- 发表时间:
2008 - 期刊:
- 影响因子:0
- 作者:
Adam Kent;Joseph Parilla - 通讯作者:
Joseph Parilla
Comment on ‘The magmatic architecture and evolution of the Chang’e-5 lunar basalts’
评《嫦娥五号月球玄武岩的岩浆结构与演化》
- DOI:
10.1016/j.jsames.2023.104505 - 发表时间:
2023 - 期刊:
- 影响因子:1.8
- 作者:
P. Wieser;Christy Till;Adam Kent;Matthew Gleeson - 通讯作者:
Matthew Gleeson
Federal Expenditures on Pre-Kindergarteners and Kindergarteners in 2008 (Ages 3 through 5)
- DOI:
- 发表时间:
2010-04 - 期刊:
- 影响因子:0
- 作者:
Adam Kent - 通讯作者:
Adam Kent
Adam Kent的其他文献
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{{ truncateString('Adam Kent', 18)}}的其他基金
Cascade21: A workshop to catalyze and synthesize understanding of the role of magmatism in an archetype continental arc
Cascade21:催化和综合理解岩浆作用在原型大陆弧中的作用的研讨会
- 批准号:
2025606 - 财政年份:2020
- 资助金额:
$ 18万 - 项目类别:
Standard Grant
Collaborative Research: Synthesizing arc-scale geochemical, petrologic, and geophysical datasets to investigate causes of volcanic diversity in the Cascade Arc
合作研究:综合弧级地球化学、岩石学和地球物理数据集,研究喀斯喀特弧火山多样性的原因
- 批准号:
1948862 - 财政年份:2020
- 资助金额:
$ 18万 - 项目类别:
Continuing Grant
GEOPRISMS Postdoctoral Scholar proposal: Unravelling monogenetic volcanism in the Cascades Volcanic Range
GEOPRISMS 博士后学者提案:解开喀斯喀特火山山脉的单生火山作用
- 批准号:
1850779 - 财政年份:2019
- 资助金额:
$ 18万 - 项目类别:
Standard Grant
Collaborative Research: The Tumalo Volcanic Center - Probing the Origin of Explosive Pleistocene Silicic Volcanism in Central Oregon
合作研究:图马洛火山中心 - 探索俄勒冈州中部更新世硅质火山爆发的起源
- 批准号:
1763639 - 财政年份:2018
- 资助金额:
$ 18万 - 项目类别:
Standard Grant
Collaborative research: Assessing changes in the state of a magma storage system over caldera-forming eruption cycles, a case study at Taupo Volcanic Zone, New Zealand
合作研究:评估火山口形成喷发周期中岩浆储存系统状态的变化,新西兰陶波火山区的案例研究
- 批准号:
1654275 - 财政年份:2017
- 资助金额:
$ 18万 - 项目类别:
Continuing Grant
Collaborative Research: Quantifying the Thermal History of Crustal Magma Storage Through Crystal Records and Numerical Modeling
合作研究:通过晶体记录和数值模拟量化地壳岩浆储存的热历史
- 批准号:
1425491 - 财政年份:2014
- 资助金额:
$ 18万 - 项目类别:
Standard Grant
MARGINS: The Explosive Volcanic History of the Central Oregon Cascades: Probing the Changing State of the Neogene Cascade Arc
边缘:俄勒冈中部喀斯喀特火山爆发的历史:探索新近纪喀斯喀特弧的变化状态
- 批准号:
1144555 - 财政年份:2012
- 资助金额:
$ 18万 - 项目类别:
Standard Grant
Collaborative Research: Tectonic Links, Magma Fluxes, and Single Mineral Geochemistry in Plutonic Systems From 5-30 km Depth, Cascades Core, Washington
合作研究:5-30 公里深度的深成系统中的构造联系、岩浆通量和单一矿物地球化学,Cascades Core,华盛顿
- 批准号:
0948616 - 财政年份:2010
- 资助金额:
$ 18万 - 项目类别:
Continuing Grant
Acquisition of Acquisition of laser ablation and quadrupole ICP-MS instrumentation for study of high-resolution records in Earth materials at Oregon State University
俄勒冈州立大学采购激光烧蚀和四极 ICP-MS 仪器,用于地球材料高分辨率记录的研究
- 批准号:
1028762 - 财政年份:2010
- 资助金额:
$ 18万 - 项目类别:
Continuing Grant
Collaborative Research: Timescales of Crystal Residence and Magma Mixing at Mount Hood, Oregon
合作研究:俄勒冈州胡德山水晶住宅和岩浆混合的时间尺度
- 批准号:
0838421 - 财政年份:2009
- 资助金额:
$ 18万 - 项目类别:
Continuing Grant
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