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

一个典型的山脊-侧翼热液系统的原始流体从未被取样过，主要是因为不可能找到一个可以收集有代表性样品的集中放电点。在东太平洋隆起东侧23英里的海床上，PIs已经找到了一个小的基底特征，Dorado露头，他们计划对其进行取样，以确定流体成分，并评估露头的排放率，这样他们就可以量化这个热液系统的化学影响。他们计划进行一次为期18天的探险，结合AUV Sentry的测量能力（测深、海底声纳、照片拼接、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ROV Jason II的调查和采样能力，收集弹簧和羽流流体、热流数据、沉积物推动岩心、静止和视频摄影。这些数据和样本将有望结合起来，对多拉多露头的热液流动进行第一次精确的估计。这次考察将从一个？消防水带吗?对于脊侧热液系统，挑战了通常认为脊侧热液系统的排放主要来自弥漫性渗漏的观点。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这个项目获得经验。Wheat和Hulme正在开发动手科学技术包，以吸引K-8学生在为期一周的学习机会中，每个年级包括三个基于技术的活动，并符合国家科学，数学和语言艺术标准。

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.