SGER - Final Processing and Publication of Conductive Heat Flow Data from the Endeavour Hydrothermal Field, Juan de Fuca Ridge
SGER - Final Processing and Publication of Conductive Heat Flow Data from the Endeavour Hydrothermal Field, Juan de Fuca Ridge
批准号:
0902626
负责人:
Harlan Johnson
金额:
$0.0万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2008
资助国家:
美国
项目状态:
已结题
起止时间:
2008-12-01 至 2010-05-31
中文摘要
洋中脊的热液循环(以温泉为证据)支持外来的化学合成生物群落,并引起化学交换,影响地壳和海洋的化学成分。这一过程的一个重要后果是地壳的矿化。世界上大部分地区?例如,美国经济铜矿就是在这一过程中形成的。因此,了解海脊热液过程是一个重要的科学目标。脊2000计划(R2K)的一个具体目标是在三个综合研究地点(ISS)建立热液系统和过程的模型,一个在西太平洋的劳盆地,一个在赤道东太平洋隆起,一个在美国西海岸的胡安德富卡山脊。对这些模型特别重要的限制是观察到的热流。需要测量的热流值来约束这些模型,但这类数据很少,部分原因是传统方法无法使用。为了解决这一问题,开发了UW热流毯并进行了现场测试,但没有对数据进行分析,因此该方法仍未得到证实。热毯数据的分析将立即为奋进号站点提供有用的热流数据,一旦证实,热毯技术也可用于获取EPR和Lau站点的热流数据。该项目还将为至少一名本科生提供参与基础研究的机会。
英文摘要
Hydrothermal circulation (evidenced by hot springs) at mid-ocean ridges supports exotic chemosynthetic biological communities and causes a chemical exchange that affects the chemistry of both the crust and the ocean. One significant consequence of this process is mineralization of the crust. Most of the world?s economic copper deposits, for example, formed in the way. Understanding ridge hydrothermal processes is thus an important scientific objective. A spepfic objective of the Ridge2000 Program (R2K) is to model the hydrothermal systems and processes at three Integrated Studies Sites (ISS), one in the Lau Basin in the western Pacific, one on the equatorial East Pacific Rise, and one on the Juan de Fuca Ridge off the west coast of the U.S. A particularly important constraint on such models is observed heat flow. Measured heat flow values are needed to constrain these models, but few such data are available in part because conventional methods cannot be used. The UW heat flow blanket was developed and field-tested to solve this problem, but the data have not been analyzed, and the method thus remains unproven. Analysis of the thermal blanket data will immediately provide useful heat flow data for the Endeavour Site, and, once proven, the thermal blanket technique can be used to acquire heat flow data at the EPR and Lau sites as well. This project will also provide an opportunity for at least one undergraduate student to participate in basic research.
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