Why primordial continents were recycled to the deep: Role of subduction erosion

被引：22

作者：

Azuma, S. ^{[1
]}

Yamamoto, S. ^{[2
]}

Ichikawa, H. ^{[1
,3
]}

Maruyama, S. ^{[1
]}

机构：

[1] Tokyo Inst Technol, Earth Life Sci Inst, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan

[2] Yokohama Natl Univ, Grad Sch Environm & Informat Sci, Hodogaya Ku, 79-7 Tokiwadai, Yokohama, Kanagawa 2408501, Japan

[3] Ehime Univ, Geodynam Res Ctr, 2-5 Bunkyo Cho, Matsuyama, Ehime 7908577, Japan

来源：

GEOSCIENCE FRONTIERS | 2017年 / 8卷 / 02期

关键词：

Subduction erosion; Hadean; Plate tectonics; Archean; CONVERGENT PLATE MARGINS; SEDIMENT SUBDUCTION; TECTONIC EROSION; MELANGE FORMATION; DETRITAL ZIRCONS; PRISM ACCRETION; CHANNEL MODEL; CRUST; MANTLE; EARTH;

D O I：

10.1016/j.gsf.2016.08.001

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Geological observations indicate that there are only a few rocks of Archean Earth and no Hadean rocks on the surface of the present-day Earth. From these facts, many scientists believe that the primordial continents never existed during Hadean Earth, and the continental volume has kept increasing. On the other hand, recent studies reported the importance of the primordial continents on the origin of life, implying their existence. In this paper, we discussed the possible process that could explain the loss of the primordial continents with the assumption that they existed in the Hadean. Although depending on the timing of the initiation of plate tectonics and its convection style, subduction erosion, which is observed on the present-day Earth, might have carried the primordial continents into the deep mantle. (C) 2016, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.

引用

页码：337 / 346

页数：10

共 76 条

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