Magmatic intrusion west of Three Sisters, central Oregon, USA: The perspective from spring geochemistry
Magmatic intrusion west of Three Sisters, central Oregon, USA: The perspective from spring geochemistry
复制标题
DOI：
10.1130/g19974.1
复制
发表时间：
2004
期刊：
影响因子：
5.8
通讯作者：
W. Evans;M. V. Soest;R. Mariner;S. Hurwitz;S. Ingebritsen;C. Wicks;M. Schmidt
中科院分区：
文献类型：
--
作者：
W. Evans;M. V. Soest;R. Mariner;S. Hurwitz;S. Ingebritsen;C. Wicks;M. Schmidt
三姐妹篇火山附近的泉水进行了地球化学调查，以响应地壳隆起的检测西部的山峰。稀释，低温温泉隆起中心附近显示3 He/ 4 He比$7RA（RA是在空气中的比例），并在总运输;16兆瓦的热量和;180克/秒的岩浆碳（CO2）。这些异常情况清楚地反映了岩浆的影响，但它们似乎早于目前的隆升开始，并源于以前的事件。因此，在这一地区，侵入的发生可能比喷发口的年龄所暗示的更为常见。
A geochemical investigation of springs near Three Sisters volcanoes was conducted in response to the detection of crustal uplift west of the peaks. Dilute, low-temperature springs near the center of uplift show 3 He/ 4 He ratios $7RA (RA is the ratio in air), and transport in total ;16 MW of heat and ;180 g/s of magmatic carbon (as CO2). These anomalous conditions clearly reflect the influence of magma, but they seemingly predate the onset of the present uplift and derive from a previous event. Episodes of intrusion may thus be more common in this area than the age of eruptive vents would imply.