Enigmatic Mid-Proterozoic Orogens: Hot, Thin, and Low
文献类型：期刊论文
| 作者 | Spencer, Christopher J.1; Mitchell, Ross N.2; Brown, Michael3 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2021-08-28 |
| 卷号 | 48期号:16页码:12 |
| 关键词 | orogeny crustal thickness ultra-high temperature metamorphism |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2021GL093312 |
| 英文摘要 | Since the Archean, secular change in orogenic style is demonstrated through evolution of metamorphic conditions and geochemical proxies. Linked to orogenic style is the amount of crustal thickening and elevation, whereas orogenic vigor is related to the supercontinent cycle. An array of Proterozoic orogens spanned the assembly of supercontinents Columbia and Rodinia, but the vigor of orogenesis is debated, with proposals for both Mesoproterozoic quiescence and climax. We show mid-Proterozoic orogenesis occurred globally and was broadly continuous; furthermore, orogens exhibit elevated metamorphic thermobaric ratios with large volumes of high-temperature felsic magmatic rocks. These features reflect higher mantle heat flux leading to increased mid-crustal flow and lower elevation. In this context, proposals that geochemical proxies for crustal thickness record orogenic quiescence are inconsistent with the geological record. Alternatively, secular change in crustal thickness is attributed to orogenic style, namely the prevalence of hot, thin, and low orogens in the mid-Proterozoic. |
| WOS关键词 | PLATE-TECTONICS ; SOUTHERN MARGIN ; CRUST ; EVOLUTION ; COLLISION ; EARTH ; METAMORPHISM ; EMERGENCE ; EXTENSION ; GRANITES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000688759800023 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102627]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Spencer, Christopher J. |
| 作者单位 | 1.Queens Univ, Dept Geol Sci & Geol Engn, Kingston, ON, Canada 2.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing, Peoples R China 3.Univ Maryland, Lab Crustal Petrol, Dept Geol, College Pk, MD 20742 USA |
| 推荐引用方式 GB/T 7714 | Spencer, Christopher J.,Mitchell, Ross N.,Brown, Michael. Enigmatic Mid-Proterozoic Orogens: Hot, Thin, and Low[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(16):12. |
| APA | Spencer, Christopher J.,Mitchell, Ross N.,&Brown, Michael.(2021).Enigmatic Mid-Proterozoic Orogens: Hot, Thin, and Low.GEOPHYSICAL RESEARCH LETTERS,48(16),12. |
| MLA | Spencer, Christopher J.,et al."Enigmatic Mid-Proterozoic Orogens: Hot, Thin, and Low".GEOPHYSICAL RESEARCH LETTERS 48.16(2021):12. |
入库方式： OAI收割
来源：地质与地球物理研究所
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