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CAREER: Deciphering the mechanisms of forearc basin formation by engaging undergraduate and middle school students in field and analytical geoscience research

职业：通过让本科生和中学生参与实地和分析地球科学研究来解读弧前盆地的形成机制

基本信息

批准号：
1942460
负责人：
Devon Orme
金额：
$ 65.17万
依托单位：
Montana State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-03-15 至 2025-02-28
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1942460&HistoricalAwards=false
关键词：
CAREER Deciphering mechanisms forearc basin

项目摘要

Mountain belts that incorporate chains of volcanoes, called magmatic arcs, develop at tectonic convergent margins where an oceanic plate is subducting beneath a continent or island arc. Forearc basins develop oceanward of the magmatic arc of a convergent margin and trap sediment in deep troughs. These basins can exist for tens to hundreds of millions of years, serving as a long-term record of past Earth environments, processes, climate regimes, and life. They also host natural resources such as oil and gas. The goal of this research is to determine the origin of forearc basins by investigating the relationship between the types of rocks that underlie the basin and the sedimentary rocks preserved within the basin. The research and education components of this project focus on increasing diversity in, and accessibility to, the geosciences through sustained engagement with underrepresented undergraduate students and middle school girls from rural communities in Montana. Students will participate in research design, field and laboratory work, and national conferences. Students also will help lead a STEM workshop for middle school girls focused on rocks and minerals from the western U.S. and Tibet. The project will resolve critical questions in the evolution of Earth and offer opportunities to students who traditionally have limited participation in the geosciences.The mechanisms of forearc basin formation are not well understood because of poor preservation in the rock record or overprinting of primary tectonic and stratigraphic relationships by subsequent deformation. This research will test the hypothesis that extension of the underlying basement in a forearc region provides a mechanism to trap sediment and initiate basin subsidence as a precursor to forearc basin formation. The hypothesis will be tested by applying chronologic and geochemical methods to describe the tectonic setting of basement formation, timing and rates of basement-forearc development, and subsequent geologic history. The research will combine field mapping and sedimentology with sandstone petrography, biostratigraphy, geochronology, paleomagnetism, and low-temperature thermochronology. Field areas include the Great Valley forearc, California and the Xigaze forearc, Tibet. Each field area preserves primary relationships between basement and basin stratigraphy in similar, but not identical tectonic settings. The education plan integrates with the research activities by establishing the Montana State University Sedimentary Undergraduate Research program (MSU-SUR), which seeks to broaden the Earth Science community through sustained engagement with Native American and first-generation college students. Students in the MSU-SUR program will contribute directly to the research by participating in literature review and field planning, along with collecting and evaluating data and disseminating results.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

山脉带包含火山链，称为岩浆弧，在构造会聚边缘发展，海洋板块俯冲到大陆或岛弧之下。弧前盆地在会聚边缘的岩浆弧的海洋方向发展，并在深槽中捕获沉积物。这些盆地可以存在数千万至数亿年，作为过去地球环境，过程，气候制度和生命的长期记录。它们还拥有石油和天然气等自然资源。这项研究的目的是通过调查盆地下的岩石类型与盆地内保存的沉积岩之间的关系来确定弧前盆地的起源。该项目的研究和教育部分侧重于通过持续参与蒙大拿州农村社区代表性不足的本科生和中学女生，增加地球科学的多样性和可及性。学生将参加研究设计，现场和实验室工作，以及国家会议。学生们还将帮助领导一个针对中学女生的STEM研讨会，重点是来自美国西部和西藏的岩石和矿物。该项目将解决地球演化中的关键问题，并为传统上对地球科学参与有限的学生提供机会。弧前盆地形成的机制还没有得到很好的理解，因为岩石记录保存不好，或者后来的变形叠加了最初的构造和地层关系。这项研究将测试的假设，在弧前地区的基础上的扩展提供了一种机制，以捕获沉积物和启动盆地沉降作为弧前盆地形成的前兆。该假设将通过应用年代学和地球化学方法来描述基底形成的构造背景、基底-弧前发育的时间和速率以及随后的地质历史来进行检验。这项研究将把联合收割机野外测绘和沉积学与砂岩岩石学、生物地层学、地质年代学、古地磁学和低温热年代学结合起来。野外地区包括加州的大峡谷前弧和西藏日喀则前弧。每个油田区在相似但不相同的构造环境中保留了基底和盆地地层之间的主要关系。教育计划通过建立蒙大拿州立大学沉积本科研究计划（MSU-SUR）与研究活动相结合，该计划旨在通过与美国原住民和第一代大学生的持续接触来扩大地球科学界。MSU-SUR项目的学生将通过参与文献综述和实地规划，沿着收集和评估数据并传播结果，直接为研究做出贡献。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。

项目成果

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Thermal history of the northern Great Valley forearc basin, California

加利福尼亚州北部大峡谷弧前盆地的热历史

DOI：
发表时间：
2023
期刊：
Geological Society of America Penrose
影响因子：
0
作者：
Orme, D.A.;Romero, M.C.;Oleson, E.;Weis, N
通讯作者：
Weis, N

THE RELATIONSHIP BETWEEN THE FORMATION AND EVOLUTION OF THE COAST RANGE OPHIOLITE AND GREAT VALLEY FOREARC, NORTHERN AND CENTRAL CALIFORNIA

加州北部和中部海岸山脉蛇绿岩与大谷前弧的形成和演化之间的关系

DOI：
10.1130/abs/2021am-367001
发表时间：
2021
期刊：
Geological Society of America Abstracts with Programs
影响因子：
0
作者：
Oleson, Ethan;Orme, Devon
通讯作者：
Orme, Devon

YOUNGER THAN ANTICIPATED MAXIMUM DEPOSITIONAL AGES OF SANDSTONES FOUND IN THE GREAT VALLEY FOREARC BASIN REVEAL LENGTHENED UNCONFORMITY BETWEEN THE COAST RANGE OPHIOLITE AND BASAL GREAT VALLEY GROUP, DEL PUERTO CANYON, CALIFORNIA, USA

美国加利福尼亚州德尔波多峡谷大谷前弧盆地发现的砂岩最大沉积年龄比预期的最大沉积年龄更年轻，表明蛇绿岩海岸范围和基底大谷群之间的不整合面延长

DOI：
10.1130/abs/2023am-393706
发表时间：
2023
期刊：
Abstracts Geological Society of America
影响因子：
0
作者：
Weis, Natalee;Orme, Devon A.;Surpless, Kathleen D.;Colliver, Ian;Sweet, Emma;Ross, Carly
通讯作者：
Ross, Carly

PROVENANCE AND DEPOSITIONAL AGE ANALYSIS OF THE BASAL GREAT VALLEY FOREARC IN NORTHERN CALIFORNIA USING DETRITAL AND IGNEOUS ZIRCON U-PB GEOCHRONOLOGY

利用碎屑和火成锆石 U-PB 地质年代学对北加州基底大谷前弧的物源和沉积年龄进行分析

DOI：
10.1130/abs/2021am-367406
发表时间：
2021
期刊：
Geological Society of America Abstracts with Programs
影响因子：
0
作者：
Dittrich, Samantha;Orme, Devon
通讯作者：
Orme, Devon

TRENCH VERSUS FOREARC: LATE CRETACEOUS TRENCH SEDIMENT ACCUMULATION AND FOREARC EROSION ALONG THE SOUTHERN MARGIN OF TIBET AS REVEALED BY PROVENANCE ANALYSIS

海沟与弧前：物源分析揭示的沿西藏南缘的晚白垩世海沟沉积物堆积和弧前侵蚀

DOI：
10.1130/abs/2021am-368259
发表时间：
2021
期刊：
Geological Society of America Abstracts with Programs
影响因子：
0
作者：
Orme, Devon;Laskowski, Andrew;Zilinksy, Misia F.;Chao, Wang;Guo, Xudong;Cai, Fulong;Ding, Lin
通讯作者：
Ding, Lin