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DOI | 10.1002/2017GL073440 |
A hot midmantle anomaly in the area of the Indian Ocean Geoid Low | |
Reiss, Anne-Sophie1; Thomas, Christine1; van Driel, Jac2; Heyn, Bjorn1,3 | |
2017-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; England; Norway |
英文摘要 | We investigate the upper mantle seismic discontinuities at 410 and 660 km depth beneath the Indian Ocean Geoid Low (IOGL). To map the discontinuities' topography, we use differential travel times of PP and SS waves and their precursors. Our final data set consists of 37 events with M-w >= 5.8, which densely cover our investigation area, also with crossing ray paths. We use array methods to detect the low-amplitude precursor signals. The best quality data show a deepened 410 km discontinuity in the center of the IOGL as well as a mostly elevated 660 km discontinuity beneath the northern Indian Ocean, which we interpret as a hot anomaly currently residing in the mantle transition zone. We conclude that the largest negative geoid anomaly might be caused by a combined effect of hot material in the midmantle below the innermost IOGL and cold material below 660 km farther south. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406257400027 |
WOS关键词 | TRANSITION ZONE STRUCTURE ; MANTLE DISCONTINUITIES BENEATH ; SEISMIC OBSERVATIONS ; PHASE-EQUILIBRIA ; TOPOGRAPHY ; PACIFIC ; PP ; GRAVITY ; SUBDUCTION ; VELOCITY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27876 |
专题 | 气候变化 |
作者单位 | 1.Westfalische Wilhelms Univ Munster, Munster, Germany; 2.UCL, London, England; 3.Univ Oslo, Oslo, Norway |
推荐引用方式 GB/T 7714 | Reiss, Anne-Sophie,Thomas, Christine,van Driel, Jac,et al. A hot midmantle anomaly in the area of the Indian Ocean Geoid Low[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13). |
APA | Reiss, Anne-Sophie,Thomas, Christine,van Driel, Jac,&Heyn, Bjorn.(2017).A hot midmantle anomaly in the area of the Indian Ocean Geoid Low.GEOPHYSICAL RESEARCH LETTERS,44(13). |
MLA | Reiss, Anne-Sophie,et al."A hot midmantle anomaly in the area of the Indian Ocean Geoid Low".GEOPHYSICAL RESEARCH LETTERS 44.13(2017). |
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