Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks

doi:10.1073/pnas.1902833116

	Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks
	Liu, He 1,2,3; Zartman, Robert E.1; Ireland, Trevor R.4; Sun, Wei-dong1,2,3
	2019-09-17
发表期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN	0027-8424
卷号	116 期号:38 页码:18854-18859
通讯作者	Sun, Wei-dong(weidongsun@qdio.ac.cn)
摘要	Atmospheric oxygen has evolved from negligible levels in the Archean to the current level of about 21% through 2 major step rises: The Great Oxidation Event (GOE) in the early Proterozoic and the Neoproterozoic Oxygenation Event (NOE) during the late Proterozoic. However, most previous methods for constraining the time of atmospheric oxygenation have relied on evidence from sedimentary rocks. Here, we investigate the temporal variations of the Th/U of arc igneous rocks since 3.0 billion y ago (Ga) and show that 2 major Th/U decreases are recorded at ca. 2.35 Ga and ca. 0.75 Ga, coincident with the beginning of the GOE and NOE. The decoupling of U from Th is predominantly caused by the significant rise of atmospheric oxygen. Under an increasingly oxidized atmosphere condition, more uranium in the surface environment became oxidized from the water-insoluble U4+ to the water-soluble U6+ valance and incorporated in the sea water and altered oceanic crust. Eventually, the subduction of this altered oceanic crust produced the low-Th/U signature of arc igneous rocks. Therefore, the sharp decrease of Th/U in global arc igneous rocks may provide strong evidence for the rise of atmospheric oxygen. We suggest that the secular Th/U evolution of arc igneous rocks could be an effective geochemical indicator recording the global-scale atmospheric oxygen variation.
关键词	Th/U systematics arc igneous rocks Great Oxidation Event Neoproterozoic Oxygenation Event
DOI	10.1073/pnas.1902833116
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDB18020102] ; National Key R&D Program of China[2016YFC0600408] ; CAS President visiting fellowship ; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDB18020102] ; National Key R&D Program of China[2016YFC0600408] ; CAS President visiting fellowship
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000486388400023
出版者	NATL ACAD SCIENCES
引用统计	被引频次：34[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/162981
专题	深海极端环境与生命过程研究中心
通讯作者	Sun, Wei-dong
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Shandong, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Shandong, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China 4.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia
第一作者单位	深海极端环境与生命过程研究中心
通讯作者单位	深海极端环境与生命过程研究中心
推荐引用方式 GB/T 7714	Liu, He,Zartman, Robert E.,Ireland, Trevor R.,et al. Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(38):18854-18859.
APA	Liu, He,Zartman, Robert E.,Ireland, Trevor R.,&Sun, Wei-dong.(2019).Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(38),18854-18859.
MLA	Liu, He,et al."Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.38(2019):18854-18859.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Liu-2019-Global-atmo（1113KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览
Global atmospheric o（1094KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览