A template for an improved rock-based subdivision of the pre-Cryogenian timescale
文献类型：期刊论文
| 作者 | Shields, Graham A.2; Strachan, Robin A.3; Porter, Susannah M.4; Halverson, Galen P.5; Macdonald, Francis A.4; Plumb, Kenneth A.6; de Alvarenga, Carlos J.7; Banerjee, Dhiraj M.8; Bekker, Andrey9; Bleeker, Wouter10 |
| 刊名 | JOURNAL OF THE GEOLOGICAL SOCIETY
 |
| 出版日期 | 2021-07-07 |
| 页码 | 22 |
| ISSN号 | 0016-7649 |
| DOI | 10.1144/jgs2020-222 |
| 英文摘要 | The geological timescale before 720 Ma uses rounded absolute ages rather than specific events recorded in rocks to subdivide time. This has led increasingly to mismatches between subdivisions and the features for which they were named. Here we review the formal processes that led to the current timescale, outline rock-based concepts that could be used to subdivide pre-Cryogenian time and propose revisions. An appraisal of the Precambrian rock record confirms that purely chronostratigraphic subdivision would require only modest deviation from current chronometric boundaries, removal of which could be expedited by establishing event-based concepts and provisional, approximate ages for eon-, era- and period-level subdivisions. Our review leads to the following conclusions: (1) the current informal four-fold Archean subdivision should be simplified to a tripartite scheme, pending more detailed analysis, and (2) an improved rock-based Proterozoic Eon might comprise a Paleoproterozoic Era with three periods (early Paleoproterozoic or Skourian, Rhyacian, Orosirian), Mesoproterozoic Era with four periods (Statherian, Calymmian, Ectasian, Stenian) and a Neoproterozoic Era with four periods (pre-Tonian or Kleisian, Tonian, Cryogenian and Ediacaran). These proposals stem from a wide community and could be used to guide future development of the pre-Cryogenian timescale by international bodies. |
| WOS关键词 | VASE-SHAPED MICROFOSSILS ; LARGE IGNEOUS PROVINCES ; ORGANIC-WALLED MICROFOSSILS ; PRECAMBRIAN TIME-SCALE ; DETRITAL ZIRCON GEOCHRONOLOGY ; SNOWBALL EARTH HYPOTHESIS ; CARBON-ISOTOPE EXCURSION ; NORTH CHINA CRATON ; U-PB ; PILBARA CRATON |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | GEOLOGICAL SOC PUBL HOUSE |
| WOS记录号 | WOS:000675889200001 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101947]  |
| 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 | Shields, Graham A. |
| 作者单位 | 1.Univ Adelaide, Dept Earth Sci, Adelaide, SA, Australia 2.UCL, Dept Earth Sci, London, England 3.Univ Portsmouth, Sch Environm Geog & Geosci, Portsmouth, Hants, England 4.Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA 5.McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ, Canada 6.Geosci Australia, Canberra, ACT, Australia 7.Univ Brasilia, Inst Geociencias, Brasilia, DF, Brazil 8.Univ Delhi, Dept Geol, Delhi, India 9.Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA 10.Geol Survey Canada, Ottawa, ON, Canada |
| 推荐引用方式 GB/T 7714 | Shields, Graham A.,Strachan, Robin A.,Porter, Susannah M.,et al. A template for an improved rock-based subdivision of the pre-Cryogenian timescale[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2021:22. |
| APA | Shields, Graham A..,Strachan, Robin A..,Porter, Susannah M..,Halverson, Galen P..,Macdonald, Francis A..,...&Zhu, Maoyan.(2021).A template for an improved rock-based subdivision of the pre-Cryogenian timescale.JOURNAL OF THE GEOLOGICAL SOCIETY,22. |
| MLA | Shields, Graham A.,et al."A template for an improved rock-based subdivision of the pre-Cryogenian timescale".JOURNAL OF THE GEOLOGICAL SOCIETY (2021):22. |
入库方式： OAI收割
来源：地质与地球物理研究所
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