Collaborative Research: CO2 Springs and Travertines of the Southwestern US: Hydrologic Pathways Linking Tectonism to Water Quality

合作研究：美国西南部的二氧化碳泉和石灰华：连接构造运动与水质的水文路径

基本信息

批准号：
0538304
负责人：
Laura Crossey
金额：
$ 14.23万
依托单位：
University of New Mexico
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2006
资助国家：
美国
起止时间：
2006-02-01 至 2009-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0538304&HistoricalAwards=false
关键词：
Collaborative Research CO2 Springs Travertines

项目摘要

This project investigates the novel hypothesis that the Quaternary travertines and CO2-rich springs of the western US are a consequence of the interplay between tectonic activity (magmatism and seismicity) and hydrology. Previous work has shown that travertine-depositing cool springs and hydrothermal springs of the western U.S. have 3He/4He ratios indicative of mantle out-gassing and hence are surface manifestations of mantle inputs. Deeply-sourced fluids include high salt contents and deleterious trace elements such as arsenic and uranium, and may naturally mix into aquifer systems on the Colorado Plateau and the Rio Grande Rift. Observation of the geochemistry of water and gas from active springs, combined with groundwater modeling, will assist in understanding the connections between deep-sourced and shallow-sourced hydrologic inputs. We will examine water and gases in the Colorado Plateau and surrounding tectonic provinces to; 1) evaluate endogenic hydrologic end members that may correspond to heterogeneity in mantle inputs and proximity to young basaltic volcanism; 2) quantify mixing parameters between deeply-sourced and shallow-sourced groundwaters via hydrologic modeling; 3) conduct neotectonic studies on Quaternary faults, travertines, travertine-depositing springs, and CO2 fields to establish the link between tectonism and water quality. We are using natural geochemical tracers (major and trace elements in water including Sr, Cl/Br, As, and stable isotopes of C, H and O) integrated with gas chemistry (3He/4He, CO2, % He, N2/He, N2/CO2, CO2/3He). The spatial scale of the proposed study is from local to regional; the temporal scale ranges from modern to the late Neogene geologic record of CO2 outgassing encoded in travertine deposits. This project includes education and outreach effort at the graduate and undergraduate levels, an integration of research and teaching, informal public education through the Trail of Time project at Grand Canyon, and involvement of minority populations, including Native American. We are working closely with the National Park Service and with various Native American tribes (Hualapai, Havasupai, and Navajo) whose waters are directly impacted by deeply sourced contaminants.

该项目调查了一个新的假设，即美国西部的第四纪圆环和二氧化碳富含弹簧是构造活动（岩浆和地震性）与水文学之间相互作用的结果。先前的工作表明，美国西部的石灰华凉泉和热液弹簧的比率为3He/4He的比例，表明地幔外 - 因此是地幔输入的表面表现。深层的流体包括高盐含量和有害的微量元素，例如砷和铀，并且可以自然地混合到科罗拉多高原和里奥格兰德裂谷的含水层系统中。观察活跃弹簧的水和气体地球化学，再加上地下水建模，将有助于理解深水和浅水的水文输入之间的连接。我们将检查科罗拉多高原和周围构造省的水和气体； 1）评估内源性水文最终构件，这可能对应于地幔投入中的异质性，并且与年轻的玄武岩火山剂相对应； 2）通过水文建模量化深层和浅水地下水之间的混合参数； 3）对第四纪断层，石灰华，脱粒弹簧和二氧化碳领域进行新剪原研究，以建立构造与水质之间的联系。我们使用的是与气体化学的自然地球化学示踪剂（Cl/br，AS和稳定的同位素，包括SR，Cl/br，AS和稳定的同位素）的天然地球化学示踪剂。 N2/CO2，CO2/3HE）。拟议的研究的空间量表是从地方到区域的。颞尺度的范围从现代到新金元的二氧化碳地质记录，超过了钙质沉积物中编码的二氧化碳记录。该项目包括在毕业生和本科阶段的教育和外展工作，研究和教学的整合，通过大峡谷时代项目的非正式公共教育以及包括美洲原住民在内的少数民族人群的参与。我们正在与国家公园管理局（National Park Service）和美国原住民部落（Hualapai，Havasupai和Navajo）紧密合作，他们的水受到深厚污染物的影响。

项目成果

期刊论文数量（2）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Hydrogeochemistry of the Middle Rio Grande aquifer system — Fluid mixing and salinization of the Rio Grande due to fault inputs

格兰德河中部含水层系统的水文地球化学 – 断层输入导致的格兰德河流体混合和盐化

DOI：
10.1016/j.chemgeo.2013.05.029
发表时间：
2013
期刊：
Chemical Geology
影响因子：
3.9
作者：
Williams, Amy J.;Crossey, Laura J.;Karlstrom, Karl E.;Newell, Dennis;Person, Mark;Woolsey, Emily
通讯作者：
Woolsey, Emily

Fence Springs of the Grand Canyon, USA: insight into the karst aquifer system of the Colorado Plateau region

美国大峡谷栅栏泉：深入了解科罗拉多高原地区岩溶含水层系统