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Collaborative Research: Discovery, sampling, and quantification of flows from cool yet massive ridge-flank hydrothermal springs on Dorado Outcrop, eastern Pacific Ocean

合作研究：东太平洋多拉多露头的凉爽而巨大的山脊侧热泉流量的发现、采样和量化

基本信息

批准号：
1130146
负责人：
Charles Wheat
金额：
$ 15.96万
依托单位：
University of Alaska Fairbanks Campus
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-09-15 至 2016-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1130146&HistoricalAwards=false
关键词：
Collaborative Research Discovery sampling quantification

项目摘要

Pristine fluids from a typical ridge-flank hydrothermal system have never been sampled, mainly because it has not been possible to locate a site of focused discharge where representative samples could be collected. The PIs have located a small basement feature, Dorado outcrop, on 23 m.y.-old seafloor on the eastern flank of the East Pacific Rise that they plan to sample to determine the fluid composition, and to assess the rate of discharge from the outcrop, so that they can quantify the chemical impact of this hydrothermal system. They plan an 18-day expedition that combines the surveying capabilities of the AUV Sentry (bathymetric, sub-bottom sonar, photo mosaics, water column anomalies) and an ocean-class vessel capable of collecting high-quality multi-beam data and CTD samples, and supporting the survey and sampling capabilities of the ROV Jason II for collection of spring and plume fluids, heat flow data, sediment push cores, and still and video photography. These data and samples will be combined hopefully to generate the first well-constrained estimates of hydrothermal flows from Dorado outcrop. This expedition will result in the collection of samples and data from a ?fire hose? of ridge-flank, hydrothermal system, challenging the commonly held view that discharge from ridge flank hydrothermal systems occurs primarily from diffuse seeps. Broader Impacts Undergraduate and graduate students and a junior faculty member will gain experience by participating in this program. Wheat and Hulme are developing hands-on science-technology packages to engage K-8 students during week-long learning opportunities that include three technology-based activities per grade level and meet national science, mathematics, and language arts standards.

从未对典型的海脊侧翼热液系统的原始流体进行过取样，主要是因为无法找到可收集代表性样品的集中排放地点。PI已经找到了一个小的地下室功能，多拉多露头，在23百万年-他们计划对东太平洋海隆东侧的古老海底进行采样，以确定流体成分，并评估露头的排放速率，以便量化该热液系统的化学影响。他们计划进行一次为期18天的考察，（测深、海底下声纳、照片镶嵌、水柱异常）和一艘能够收集高质量多波束数据和CTD样本的海洋级船只，并支持“Jason II”号的调查和采样能力，以收集泉水和羽流流体、热流数据、沉积物推芯、以及静态和视频摄影。这些数据和样本将结合起来，希望产生第一个良好的约束估计热液流从多拉多露头。这次考察将导致收集样本和数据，从一个？消防水管海脊侧翼热液系统的排放主要来自扩散渗漏的普遍看法提出了挑战。更广泛的影响本科生和研究生以及一名初级教师将通过参加该计划获得经验。Wheat和Hulme正在开发实践科学技术包，让K-8学生在为期一周的学习机会中参与，其中包括每个年级三项基于技术的活动，并符合国家科学，数学和语言艺术标准。