气候变化领域集成服务门户(CCPortal): Time-space evolution of an Archean craton: A Hf-isotope window into continent formation

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DOI	10.1016/j.earscirev.2019.04.003
	Time-space evolution of an Archean craton: A Hf-isotope window into continent formation
	Mole D.R.; Kirkland C.L.; Fiorentini M.L.; Barnes S.J.; Cassidy K.F.; Isaac C.; Belousova E.A.; Hartnady M.; Thebaud N.
发表日期	2019
ISSN	0012-8923
卷号	196
英文摘要	The Yilgarn Craton of Western Australia represents one of the largest pieces of Precambrian crust on Earth, and a key repository of information on the Meso-Neoarchean period. Understanding the crustal, tectonic, thermal, and chemical evolution of the craton is critical in placing these events into an accurate geological context, as well as developing holistic tectonic models for the Archean Earth. Here, we present a large U-Pb (420 collated samples) and Hf isotopic (2163 analyses) dataset on zircon, and apply it to constrain the evolution of the craton. These data provide strong evidence for a Hadean-Eoarchean origin for the Yilgarn Craton from mafic crust at ca. 4000 Ma, in a proto-craton consisting of the Narryer and north-central Southern Cross Domain. This ancient cratonic nucleus was subsequently rifted, expanded and reworked by successive crustal growth events at ca. 3700 Ma, ca. 3300 Ma, 3000–2900 Ma, 2825–2800 Ma, and ca. 2730–2620 Ma. The <3050 Ma crustal growth events correlate broadly with known komatiite events, and patterns of craton evolution, revealed by Hf isotope time-slice mapping, image the periodic break-up of the Yilgarn proto-continent and the formation of rift-zones between the older crustal blocks. Crustal growth and new magmatic pulses were focused into these zones and at craton margins, resulting in continent growth via internal (rift-enabled) expansion, and peripheral (crustal extraction at craton margins) magmatism. Consequently, we interpret these major geodynamic processes to be analogous to plume-lid tectonics, where the majority of tonalite-trondhjemite-granodiorite (TTG) felsic crust, and later granitic crust, was formed by reworking of hydrated mafic rocks and TTGs, respectively, via a combination of infra-crustal and/or drip-tectonic settings. We argue that subduction-like processes formed a minor tectonic component, re-docking the Narryer Terrane to the craton at ca. 2740 Ma. Overall, these processes led to an intra-cratonic architecture of younger, juvenile terranes located internal and external to older, long-lived, reworked crustal blocks. This framework provided pathways that localized later magmas and fluids, driving the exceptional mineral endowment of the Yilgarn Craton. © 2019
英文关键词	Continental crust; Crustal evolution; Geochronology; Plume tectonics; Subduction; Yilgarn
语种	英语
scopus关键词	Archean; continental crust; craton; crustal evolution; geochronology; hafnium; mantle plume; spatiotemporal analysis; subduction; tectonics; Australia; Western Australia; Yilgarn Block
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209851
作者单位	Mineral Exploration Research Centre, Harquail School of Earth Sciences and Goodman School of Mines, Laurentian University, Sudbury, Ontario P3E 2C6, Canada; Commonwealth Science and Industrial Research Organisation (CSIRO), Mineral Resources, 26 Dick Perry Ave, Kensington, Western Australia 6151, Australia; Australian Research Council (ARC) Centre of Excellence for Core to Crust Fluid Systems (CCFS), Centre for Exploration Targeting, University of Western Australia, Stirling Highway, Crawley, Perth, Western Australia 6009, Australia; School of Earth and Planetary Sciences, Centre for Exploration Targeting Curtin node, Curtin University, Kent Street, Bentley, Perth, Western Australia 6102, Australia; Australian Research Council (ARC) Centre of Excellence for Core to Crust Fluid Systems (CCFS), ARC Key Centre for the Geochemical Evolution and Metallogeny of Continents (GEMOC), Macquarie University, Sydney, North Ryde 2109, Australia
推荐引用方式 GB/T 7714	Mole D.R.,Kirkland C.L.,Fiorentini M.L.,et al. Time-space evolution of an Archean craton: A Hf-isotope window into continent formation[J],2019,196.
APA	Mole D.R..,Kirkland C.L..,Fiorentini M.L..,Barnes S.J..,Cassidy K.F..,...&Thebaud N..(2019).Time-space evolution of an Archean craton: A Hf-isotope window into continent formation.EARTH-SCIENCE REVIEWS,196.
MLA	Mole D.R.,et al."Time-space evolution of an Archean craton: A Hf-isotope window into continent formation".EARTH-SCIENCE REVIEWS 196(2019).