DOI: 10.1002/2016GL069949
论文题名: Sound velocities of olivine at high pressures and temperatures and the composition of Earth's upper mantle
作者: Zhang J.S. ; Bass J.D.
刊名: Geophysical Research Letters
ISSN: 0094-8648
EISSN: 1944-8379
出版年: 2016
卷: 43, 期: 18 起始页码: 9611
结束页码: 9618
语种: 英语
英文关键词: 410 km discontinuity
; olivine
; piclogite
; pyrolite
; sound velocities
Scopus关键词: Acoustic wave velocity
; Carbon dioxide
; Experimental mineralogy
; Olivine
; Seismology
; 410-km discontinuity
; Brillouin spectroscopy
; Eastern pacific
; Elastic properties
; High pressure
; Piclogite
; Pyrolite
; San Carlos olivines
; Silicate minerals
英文摘要: We present the elastic properties of San Carlos olivine up to P = 12.8(8) GPa and T = 1300(200) K using Brillouin spectroscopy with CO2 laser heating. A comparison of our results with the global seismic model AK135 yields average olivine content near 410 km depth of about 37% and 43% in a dry and wet (1.9 wt % H2O) upper mantle, respectively. These olivine contents are far less than in the pyrolite model. However, comparisons of our results with regional seismic models lead to very different conclusions. High olivine contents of up to 87% are implied by seismic models of the western U.S. and eastern Pacific regions. In contrast, we infer less than 35% olivine under the central Pacific. Strong variations of olivine content and upper mantle lithologies near the 410 km discontinuity are suggested by regional seismic models. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990239801&doi=10.1002%2f2016GL069949&partnerID=40&md5=e733aacfb630617471484f6d73eb4e4c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9611
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
Recommended Citation:
Zhang J.S.,Bass J.D.. Sound velocities of olivine at high pressures and temperatures and the composition of Earth's upper mantle[J]. Geophysical Research Letters,2016-01-01,43(18).