First Results from HOTSPOT: The Snake River Plain Scientific Drilling Project, Idaho, U.S.A.
First Results from HOTSPOT: The Snake River Plain Scientific Drilling Project, Idaho, U.S.A.
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HOTSPOT：美国爱达荷州蛇河平原科学钻探项目的初步结果
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Kessler
中科院分区：
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作者：
J. Shervais;Douglas R. Schmitt;Dennis L. Nielson;James P. Evans;Eric H. Christiansen;Lisa Morgan;W. C. Pat Shanks;Alexander A. Prokopenko;T. Lachmar;L. Liberty;David D. Blackwell;J. Glen;Duane Champion;K. Potter;J. Kessler
抽象的。HotSpot是一个国际合作项目，旨在了解蛇河平原(SRP)的火山历史。SRP覆盖在黄石-蛇河热点的热异常之上，该热点被认为代表了北美地下深层的地幔热柱。该项目的主要目标是记录代表该热点地表表现的SRP的火山和地层历史，并了解它如何影响大陆地壳和地幔的演化。另一个目标是评估爱达荷州南部的地热潜力。热点项目已经完成了三个钻孔。(1)Kimama遗址位于SRP的中央火山轴；我们在这里的目标是采样SRP热点之后玄武岩火山活动的长期记录。(2)金伯利遗址位于平原边缘附近；我们在这里的目标是采集与下伏羽流有关的高温流纹岩火山作用的记录。当与木间遗址配对时，这个遗址被选择来形成名义上连续的火山活动记录。(3)山之家遗址位于西部平原；我们在这里的目标是在这个地点的湖泊沉积物中取样上新世-更新世的过渡，并取样沉积物下的较老的玄武岩。我们在这里报告我们对每个地点的初步结果，以及作为该项目的一部分进行的一些地球物理记录研究。DOI：10.2204/iop.sd.15.06.2013
Abstract. HOTSPOT is an international collaborative effort to understand the volcanic history of the Snake River Plain (SRP). The SRP overlies a thermal anomaly, the Yellowstone-Snake River hotspot, that is thought to represent a deep-seated mantle plume under North America. The primary goal of this project is to document the volcanic and stratigraphic history of the SRP, which represents the surface expression of this hotspot, and to understand how it affected the evolution of continental crust and mantle. An additional goal is to evaluate the geothermal potential of southern Idaho. Project HOTSPOT has completed three drill holes. (1) The Kimama site is located along the central volcanic axis of the SRP; our goal here was to sample a long-term record of basaltic volcanism in the wake of the SRP hotspot. (2) The Kimberly site is located near the margin of the plain; our goal here was to sample a record of high-temperature rhyolite volcanism associated with the underlying plume. This site was chosen to form a nominally continuous record of volcanism when paired with the Kimama site. (3) The Mountain Home site is located in the western plain; our goal here was to sample the Pliocene-Pleistocene transition in lake sediments at this site and to sample older basalts that underlie the sediments. We report here on our initial results for each site, and on some of the geophysical logging studies carried out as part of this project. doi: 10.2204/iodp.sd.15.06.2013