Linking mantle upwelling with the lithosphere descent [corrected] and the Japan Sea evolution: a hypothesis.

Linking mantle upwelling with the lithosphere descent [corrected] and the Japan Sea evolution: a hypothesis.
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DOI:
10.1038/srep01137
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Tsepelev, Igor
Tsepelev, Igor
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ismail-Zadeh, Alik;Honda, Satoru;Tsepelev, Igor

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最近的地震层析成像研究图像的低速带(解释为高温异常),在地幔俯冲太平洋板块在日本群岛附近的深度约400公里。 这种热特征在地幔对流和俯冲带的传统观点中是相当独特的。在这里,我们提出了一个动态恢复的地幔热状态下,这一地区同化地球物理,大地测量和地质数据长达40万年。 我们假设,在太平洋板块下的热地幔上涌部分穿透俯冲板块进入地幔楔,并产生了两个较小的热隆起,这有助于在日本海盆地的快速沉降和弧后扩张。另一部分热地幔向上迁移到太平洋岩石圈之下,目前观测到的热异常是这部分地幔上涌的残余。
Recent seismic tomography studies image a low velocity zone (interpreted as a high temperature anomaly) in the mantle beneath the subducting Pacific plate near the Japanese islands at the depth of about 400 km. This thermal feature is rather peculiar in terms of the conventional view of mantle convection and subduction zones. Here we present a dynamic restoration of the thermal state of the mantle beneath this region assimilating geophysical, geodetic, and geological data up to 40 million years. We hypothesise that the hot mantle upwelling beneath the Pacific plate partly penetrated through the subducting plate into the mantle wedge and generated two smaller hot upwellings, which contributed to the rapid subsidence in the basins of the Japan Sea and to back-arc spreading. Another part of the hot mantle migrated upward beneath the Pacific lithosphere, and the presently observed hot anomaly is a remnant part of this mantle upwelling.
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