Journal ArticleDOI
Two contrasting Phanerozoic orogenic systems revealed by hafnium isotope data
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In this article, Hafnium isotope data from orogens worldwide show that each has produced a distinctive signature over the past 550 Myr, reflecting the contrasting subduction geometry in each setting.Abstract:
Two types of mountain-forming systems exist on Earth — external orogens form during oceanic–continental plate collisions and internal orogens form where continental plates collide. Hafnium isotope data from orogens worldwide show that each has produced a distinctive signature over the past 550 Myr, reflecting the contrasting subduction geometry in each setting.read more
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The assembly of Rodinia: The correlation of early Neoproterozoic (ca. 900 Ma) high-grade metamorphism and continental arc formation in the southern Beishan Orogen, southern Central Asian Orogenic Belt (CAOB)
Keqing Zong,Keqing Zong,Reiner Klemd,Yu Yuan,Zhenyu He,Jingliang Guo,Xiaoli Shi,Yongsheng Liu,Zhaochu Hu,Zeming Zhang +9 more
TL;DR: In this article, the authors provided new petrological, geochemical and geochronological data for garnet-bearing schists from the South Beishan Orogenic Belt (SBOB) in order to constrain its Neoproterozoic metamorphic history.
Journal ArticleDOI
Final closure of the Paleo‐Asian Ocean along the Solonker Suture Zone: Constraints from geochronological and geochemical data of Permian volcanic and sedimentary rocks
TL;DR: In this article, provenance analysis of Permian sedimentary rocks of arc basins along the Xar Moron River was carried out, which revealed a close relationship between the sedimentary and volcanic rock suite in the study region suggesting short transport distances and a complex convergent arc setting.
Journal ArticleDOI
Lithospheric Architecture of the Lhasa Terrane and Its Control on Ore Deposits in the Himalayan-Tibetan Orogen
Zengqian Hou,Lianfeng Duan,Yongjun Lu,Yuanchuan Zheng,Di-Cheng Zhu,Zhiming Yang,Zhusen Yang,Bao-Di Wang,Yingru Pei,Zhidan Zhao,T. Campbell McCuaig +10 more
TL;DR: In this paper, the authors integrated geologic and geochemical data (including zircon U-Pb dating and Lu-Hf isotope data) for Mesozoic-Cenozoic magmatic rocks and associated ore deposits in the Lhasa terrane, a highly endowed tectonic unit within the Himalayan-Tibetan orogen.
Journal ArticleDOI
Reconstructing pre-Pangean supercontinents
TL;DR: A consensus model of Rodinia's assembly and fragmentation has arisen from the International Geoscience Programme Project 440 working group, but the reconstruction is supported by rather sparse defi nitive-quality data as mentioned in this paper.
Journal ArticleDOI
The zircon archive of continent formation through time
Abstract: The strong resilience of the mineral zircon and its ability to host a wealth of isotopic information make it the best deep-time archive of Earth's continental crust. Zircon is found in most felsic igneous rocks, can be precisely dated and can fingerprint magmatic sources; thus, it has been widely used to document the formation and evolution of continental crust, from pluton- to global-scale. Here, we present a review of major contributions that zircon studies have made in terms of understanding key questions involving the formation of the continents. These include the conditions of continent formation on early Earth, the onset of plate tectonics and subduction, the rate of crustal growth through time and the governing balance of continental addition v. continental loss, and the role of preservation bias in the zircon record.
Supplementary material: A compilation used in this study of previously published detrital zircon U-Pb-Hf isotope data are available at http://www.geolsoc.org.uk/SUP18791
References
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Journal ArticleDOI
The Hf isotope composition of cratonic mantle: LAM-MC-ICPMS analysis of zircon megacrysts in kimberlites
William L. Griffin,William L. Griffin,Norman J. Pearson,Elena Belousova,Simon E. Jackson,E. van Achterbergh,Suzanne Y. O'Reilly,S. R. Shee +7 more
TL;DR: In this article, the isotopic composition of Hf has been measured in 124 mantle-derived zircon megacrysts from African, Siberian and Australian kimberlites, using a laser-ablation microprobe (LAM) and a multi-collector ICPMS.
Journal ArticleDOI
Tectonic models for accretion of the Central Asian Orogenic Belt
TL;DR: The Central Asian Orogenic Belt ( c. 1000-250 Ma) formed by accretion of island arcs, ophiolites, oceanic islands, seamounts, accretionary wedges, and oceanic plateaux and microcontinents in a manner comparable with that of circum-Pacific Mesozoic-Cenozoic orogens is studied in this article.
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The Lu–Hf and Sm–Nd isotopic composition of CHUR: Constraints from unequilibrated chondrites and implications for the bulk composition of terrestrial planets
TL;DR: In this paper, the Lutetium-Hafnium radiogenic isotopic system is used as a chronometer and tracer of planetary evolution, and the Lu-Hf system parameters need to be more tightly constrained, in particular the LuHf isotopic composition of the chondritic uniform reservoir and, by extension, the bulk silicate Earth.
Journal ArticleDOI
A plate tectonic model for the Paleozoic and Mesozoic constrained by dynamic plate boundaries and restored synthetic oceanic isochrons
TL;DR: In this article, a plate tectonic model for the Paleozoic and Mesozoic (Ordovician to Cretaceous) integrating dynamic plate boundaries, plate buoyancy, ocean spreading rates and major Tectonic and magmatic events was developed.
Journal ArticleDOI
Calibration of the lutetium-hafnium clock.
TL;DR: The existence of strongly unradiogenic hafnium in Early Archean and Hadean zircons implies that enriched crustal reservoirs existed on Earth by 4.3 billion years ago and persisted for 200 million years or more, and current models of early terrestrial differentiation need revision.