18 Result(s)
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Peter A. Cawood
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Pre-Cryogenian integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas
The composition and geological evolution of pre-Cryogenian material in the Tibetan Plateau and its surrounding areas have played an important role in studying the formation and evolution of early supercontinen...
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Open AccessI-type and S-type granites in the Earth’s earliest continental crust
The composition and origin of Earth’s earliest continental crust remains enigmatic due to the absence of Hadean (>4 Ga) age rocks. Here we address this question by using machine learning to examine the provena...
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Open AccessA resource for automated search and collation of geochemical datasets from journal supplements
This article presents a resource for automated search, extraction and collation of geochemical and geochronological data from the Figshare repository using web scra** code. To answer fundamental questions ab...
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Open AccessInterplay between oceanic subduction and continental collision in building continental crust
Generation of continental crust in collision zones reflect the interplay between oceanic subduction and continental collision. The Gangdese continental crust in southern Tibet developed during subduction of th...
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Open AccessOxidation of Archean upper mantle caused by crustal recycling
The redox evolution of Archean upper mantle impacted mantle melting and the nature of chemical equilibrium between mantle, ocean and atmosphere of the early Earth. Yet, the origin of these variations in redox ...
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Open AccessMariana-type ophiolites constrain the establishment of modern plate tectonic regime during Gondwana assembly
Initiation of Mariana-type oceanic subduction zones requires rheologically strong oceanic lithosphere, which developed through secular cooling of Earth’s mantle. Here, we report a 518 Ma Mariana-type subductio...
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Open AccessThermal state and evolving geodynamic regimes of the Meso- to Neoarchean North China Craton
Constraining thickness and geothermal gradient of Archean continental crust are crucial to understanding geodynamic regimes of the early Earth. Archean crust-sourced tonalitic–trondhjemitic–granodioritic gneis...
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Open AccessCrustal rejuvenation stabilised Earth’s first cratons
The formation of stable, evolved (silica-rich) crust was essential in constructing Earth’s first cratons, the ancient nuclei of continents. Eoarchaean (4000–3600 million years ago, Ma) evolved crust occurs on ...
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Thermochemical lithosphere differentiation and the origin of cratonic mantle
Cratons record the early history of continental lithosphere formation, yet how they became the most enduring part of the lithosphere on Earth remains unknown1. Here we propose a mechanism for the formation of lar...
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Open AccessCrustal growth and reworking: A case study from the Erguna Massif, eastern Central Asian Orogenic Belt
Despite being the largest accretionary orogen on Earth, the record of crustal growth and reworking of individual microcontinental massifs within the Central Asian Orogenic Belt (CAOB) remain poorly constrained...
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Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes
Estimates of the volume of the earliest crust based on zircon ages and radiogenic isotopes remain equivocal. Stable isotope systems, such as molybdenum, have the potential to provide further constraints but re...
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Open AccessA non-zircon Hf isotope record in Archean black shales from the Pilbara craton confirms changing crustal dynamics ca. 3 Ga ago
Plate tectonics and associated subduction are unique to the Earth. Studies of Archean rocks show significant changes in composition and structural style around 3.0 to 2.5 Ga that are related to changing tecton...
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Jurassic cooling ages in Paleozoic to early Mesozoic granitoids of northeastern Patagonia: 40Ar/39Ar, 40K–40Ar mica and U–Pb zircon evidence
U–Pb SHRIMP zircon crystallization ages and Ar–Ar and K–Ar mica cooling ages for basement rocks of the Yaminué and Nahuel Niyeu areas in northeastern Patagonia are presented. Granitoids that cover the time spa...
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Early Paleozoic accretionary orogenesis along northern margin of Gondwana constrained by high-Mg metaigneous rocks, SW Yunnan
SW Yunnan of China constituted part of the northern margin of Gondwana facing the proto-Tethys ocean in the early Paleozoic. However, the evolution of the region and its relationship with the accretionary orog...
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Open AccessCorrection: Corrigendum: Magmatic record of India-Asia collision
New geochronological and geochemical data on magmatic activity from the India-Asia collision zone enables recognition of a distinct magmatic flare-up event that we ascribe to slab breakoff. This tie-point in t...
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Open AccessMagmatic record of India-Asia collision
New geochronological and geochemical data on magmatic activity from the India-Asia collision zone enables recognition of a distinct magmatic flare-up event that we ascribe to slab breakoff. This tie-point in t...
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Recognition of the Phanerozoic “Young granite gneiss” in the central Yeongnam massif
Up to now, all the high-grade gneisses of the Korean peninsula have been regarded as Precambrian basement rocks and presence of the Phanerozoic high-grade metamorphic rocks have remained unknown. However, such...
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Geology and timing of mineralization at the Cangshang gold deposit, north-western Jiaodong Peninsula, China
The Cangshang gold deposit of the north-western Jiaodong Peninsula contains reserves of greater than 50 tonnes (t) and is developed by the largest open pit gold mine in China. This deposit is a Jiaojia-style (...
