Tectonic Setting and Magmatic Evolution of Eastern Laurentia in Late Paleozoic Time: Constraints from High Precision U-Pb Dating of Alleghanian Granites
东劳伦西亚晚古生代构造环境与岩浆演化:阿勒根期花岗岩高精度U-Pb测年的制约
基本信息
- 批准号:9526823
- 负责人:
- 金额:$ 9.99万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1995
- 资助国家:美国
- 起止时间:1995-12-01 至 1998-05-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
; R o o t E n t r y F u C o m p O b j b W o r d D o c u m e n t O b j e c t P o o l u u 4 @ , - . / 0 1 2 3 4 5 6 F Microsoft Word 6.0 Document MSWordDoc Word.Document.6 ; \WW60\CLIPART AUTOSAVE-PATH=R:\WWUSER PROGRAMDIR=N:\WW60 TOOLS-PATH=N:\WW60 STARTUP-PATH=R:\WWUSER\STARTUP INI-PATH=R:\WWUSER DOC-PATH=R:\WWUSER Hyphenate 1033,0=N:\WW60\HYPH.DLL,N:\WW60\HY_EN.LEX Grammar 1033,0=N:\WW60\GRAM.DLL,N:\WW60\GR_AM.LEX 9526823 Samson One of the least understood aspects of the Alleghanian orogeny in the southern Appalachians is the origin of the granitic magmas that accompanied orogensis. Determining the tectonic setting of the granites is directly linked to our understanding of the tectonic evolution of eastern Laurentia during late Paleozoic time. Various models have been proposed to explain the origin and tectonic setting of the Alleghanian plutons, including their formation in a west dipping subduction system, generation by lithospheric delamination, generation by thermal blanketing, and formation in a transpressional regime by crustal arching. The wide variation in these models reflects the lack of a coherent geochemical data base for the plutons and a paucity a high precision crystallization ages for the granites. Recent work has produced a large chemical and isotopic data set for the Alleghanian granites that places significant new constraints on likely source regions. However, the current lack of precise ages of the granites limits our ability to detect temporal trends in the geochemical data, constra in the tectonic setting of the granites, and to decipher the nature of the unexposed portions of Appalachian terranes. This study will determine crystallization ages of Alleghanian plutons from all of the major southern Appalachian lithotectonic belts by using high-precision U-Pb zircon and monazite geochronologic technique. The goals of the study are to (1) determine the initiation and duration of Alleghanian magmagenesis; (2) determine whether temporal geochemical trends exist (3) determine further the nature of unexposed Appalachian crust by dating zircon xenocrysts; and (4) constrain the timing of deformation events in selected terranes by dating pre-, syn- and post-tectonic plutons. ; Oh +' 0 $ H l D h R:\WWUSER\TEMPLATE\NORMAL.DOT 9526823 Felicia S u m m a r y I n f o r m a t i o n ( + Smith Felicia Smith @ @ @ @ Microsoft Word 6.0 1 ; e = e j j j j j j j Q 1 3 T 5 Q j Q j j j j ~ j j j j 9526823 Samson One of the least understood aspects of the Alleghanian orogeny in the southern Appalachians is the origin of the granitic magmas that accompanied orogensis. Determining the tectonic setting of the granites is directly linked to our understanding of the tectonic evolution of eastern Laurentia during late Paleozoic time. Various models have been proposed to explain the origin and tectonic setting of the Alleghanian plutons, including their formation in a west dipping subduction system, generation by lithospheric delamination, generation by thermal blanketing, and formation in a transpressional regime by crustal arching. The wide variation in these models reflects the lack of a coherent geochemical data base for the plutons and a paucity a high precision crystallization ages for the granites. Recent work has produced a large chemical and isotopic data set for the Alleghanian granites that places significant new constraints on likely source regions. However, the current lack of precise ages of the granites limits our ability to detect temporal trends i
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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Scott Samson其他文献
Scott Samson的其他文献
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{{ truncateString('Scott Samson', 18)}}的其他基金
Collaborative Research: "Double-Double Dating" of Detrital Monazite and Detrital Zircon: Quantifying Sediment Recycling in Tectonic Studies
合作研究:碎屑独居石和碎屑锆石的“双双测年”:量化构造研究中的沉积物循环
- 批准号:
1624716 - 财政年份:2016
- 资助金额:
$ 9.99万 - 项目类别:
Continuing Grant
Collaborative Research: Use and Abuse of Zircon Thermometry - Integrating Modeling, Trace Element Chemistry and Isotopes to Maximize the Use, Limit the Abuse
合作研究:锆石测温法的使用和滥用 - 整合建模、微量元素化学和同位素以最大限度地利用、限制滥用
- 批准号:
1447611 - 财政年份:2015
- 资助金额:
$ 9.99万 - 项目类别:
Standard Grant
MRI: ACQUISITION OF A NEW GENERATION THERMAL IONIZATION MASS SPECTROMETER
MRI:购买新一代热电离质谱仪
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0922710 - 财政年份:2009
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$ 9.99万 - 项目类别:
Standard Grant
Collaborative Research: Identifying the Limitations and Expanding the Utility of Detrital Mineral U-Pb Geochronology to Tectonic Studies
合作研究:确定碎屑矿物 U-Pb 地质年代学的局限性并扩展其在构造研究中的应用
- 批准号:
0635643 - 财政年份:2007
- 资助金额:
$ 9.99万 - 项目类别:
Continuing Grant
Collaborative research: Automated sequencing of the fossil record: Improved Methods and insights from Mohawkian (Ordovician) geochronology, tephrochronology, and biostratigraphy
合作研究:化石记录的自动测序:莫霍克纪(奥陶纪)地质年代学、岩石年代学和生物地层学的改进方法和见解
- 批准号:
0519106 - 财政年份:2005
- 资助金额:
$ 9.99万 - 项目类别:
Continuing Grant
Upgrading the Syracuse University Earth Sciences JEOL 6300 SEM
升级雪城大学地球科学 JEOL 6300 SEM
- 批准号:
0447154 - 财政年份:2005
- 资助金额:
$ 9.99万 - 项目类别:
Standard Grant
Chronology and Tectonic Evolution of the Southern Anti-Atlas Orogen, Morocco
摩洛哥南反阿特拉斯造山带的年代学和构造演化
- 批准号:
0106853 - 财政年份:2001
- 资助金额:
$ 9.99万 - 项目类别:
Standard Grant
Collaborative Research: Lake Titicaca Drilling Project
合作研究:的的喀喀湖钻探项目
- 批准号:
0081517 - 财政年份:2001
- 资助金额:
$ 9.99万 - 项目类别:
Continuing Grant
Paleogeography of the Carolina Terrane: Constraints from Detrital Zircon Ages
卡罗莱纳地体的古地理:来自碎屑锆石年龄的限制
- 批准号:
9909120 - 财政年份:2000
- 资助金额:
$ 9.99万 - 项目类别:
Standard Grant
Technician Support (Phase II): Radiogenic Isotope, Stable Isotope, and XRF Laboratories at Syracuse University
技术人员支持(第二阶段):雪城大学放射性同位素、稳定同位素和 XRF 实验室
- 批准号:
9909151 - 财政年份:2000
- 资助金额:
$ 9.99万 - 项目类别:
Standard Grant
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