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| Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks | |
Liu, He1,2,3; Zartman, Robert E.1; Ireland, Trevor R.4; Sun, Wei-dong1,2,3
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| 2019-09-17 | |
| Source Publication | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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| ISSN | 0027-8424 |
| Volume | 116Issue:38Pages:18854-18859 |
| Corresponding Author | Sun, Wei-dong(weidongsun@qdio.ac.cn) |
| Abstract | 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. |
| Keyword | Th/U systematics arc igneous rocks Great Oxidation Event Neoproterozoic Oxygenation Event |
| DOI | 10.1073/pnas.1902833116 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Science & Technology - Other Topics |
| WOS Subject | Multidisciplinary Sciences |
| WOS ID | WOS:000486388400023 |
| Publisher | NATL ACAD SCIENCES |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/162981 |
| Collection | 深海极端环境与生命过程研究中心 |
| Corresponding Author | Sun, Wei-dong |
| Affiliation | 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 |
| First Author Affilication | Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res |
| Corresponding Author Affilication | Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res |
| Recommended Citation 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. |
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