Zheng-Xiang Li
Curtin University
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Publications 267
#1Luc Serge Doucet (Curtin University)H-Index: 10
#2Zheng-Xiang Li (Curtin University)H-Index: 74
Last. Ross N. Mitchell (CAS: Chinese Academy of Sciences)H-Index: 12
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1 CitationsSource
#1Michael G. Tetley (California Institute of Technology)H-Index: 1
#2Zheng-Xiang Li (Curtin University)H-Index: 74
Last. Dietmar Müller (USYD: University of Sydney)H-Index: 52
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Accurately mapping plate boundary types and locations through time is essential for understanding the evolution of the plate-mantle system and the exchange of material between the solid Earth and surface environments. However, the complexity of the Earth system and the cryptic nature of the geological record make it difficult to discriminate tectonic environments through deep time. Here we present a new method for identifying tectonic paleo-environments on Earth through a data mining approach us...
1 CitationsSource
#1Ross N. Mitchell (CAS: Chinese Academy of Sciences)H-Index: 12
#2Lei Wu (Curtin University)
Last. Zheng-Xiang Li (Curtin University)H-Index: 74
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Abstract Paleogeography can be reconstructed using various crust- or mantle-based reference frames that make fundamentally different assumptions. The various reconstruction models differ significantly in continental paleolongitude, but it has been difficult to assess which models are more valid. We suggest here a “LLSVP test”, where an assumed correlation between present-day large low velocity shear-wave provinces and the paleogeography of supercontinent Pangea at breakup ca. 200 million years a...
#1Hamed Gamal El Dien (Tanta University)
#2Luc Serge Doucet (Curtin University)H-Index: 10
Last. Zheng-Xiang Li (Curtin University)H-Index: 74
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Plate tectonics and mantle plumes are two of the most fundamental solid-Earth processes that have operated through much of Earth history. For the past 300 million years, mantle plumes are known to derive mostly from two large low shear velocity provinces (LLSVPs) above the core-mantle boundary, referred to as the African and Pacific superplumes, but their possible connection with plate tectonics is debated. Here, we demonstrate that transition elements (Ni, Cr, and Fe/Mn) in basaltic rocks can b...
#1Hamed Gamal El Dien (Tanta University)
#2Shoji Arai (Kanazawa University)H-Index: 46
Last. Mohamed M. Hamdy (Tanta University)H-Index: 7
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Mantle melts provide a window on processes related to global plate tectonics. The composition of chromian spinel (Cr-spinel) from mafic-ultramafic rocks has been widely used for tracing the geotectonic environments, the degree of mantle melting and the rate of mid-ocean ridge spreading. The assumption is that Cr-spinel’s core composition (Cr# = Cr/(Cr + Al)) is homogenous, insensitive to post-formation modification and therefore a robust petrogenetic indicator. However, we demonstrate that the c...
1 CitationsSource
#1Ross N. Mitchell (Curtin University)H-Index: 12
#2Christopher J. Spencer (Curtin University)H-Index: 20
Last. William J. Collins (Curtin University)H-Index: 72
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Abstract Hafnium isotopes of zircon represent a well-dated proxy for the evolution of magmatic systems through Earth history. Time series analysis on the hafnium isotopes of zircon reveals a hierarchy of statistically significant periodic signals spanning multiple orders of magnitude (10 6 –10 9 year cycles). We attribute the hierarchy of cyclicity to organizing mechanisms of mantle and lithospheric convection at various time scales, ranging from short-term cycles in magmatism and subduction to ...
An Ediacaran complex of dyke rocks has been identified for the first time in the Yenisei Ridge orogen. These igneous rocks are represented by basic, intermediate and acid variants and formed in the conditions of the transform active continental margin at the stages of its development before and during the interruption of subduction and slab breakoff: from dykes of the picrodolerite - ​dolerite-quartz diorite - leucogranite association with age in the range of 626-623 Ma (U-Th-U isotope data for ...
#1Ni Tao (Chang'an University)H-Index: 2
#2Zheng-Xiang Li (ARC: Australian Research Council)H-Index: 74
Last. Yi-Gang Xu (CAS: Chinese Academy of Sciences)H-Index: 55
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Abstract The flat-slab subduction model has been proposed to explain the complex Mesozoic–Cenozoic geotectonic record of SE China as part of the Western Pacific margin. Here we investigate the post-250 Ma thermal history of the Shaoguan-Longnan region to evaluate the time-temperature evolution of local sedimentary and magmatic rocks in the context of the flat-subduction model. Our multi-chronological approach includes zircon U-Pb geochronology, 40Ar/39Ar dating of K-feldspar and biotite, (U-Th)/...
#1Chuan Huang (PKU: Peking University)H-Index: 1
#2Nan Zhang (PKU: Peking University)H-Index: 9
Last. Shijie Zhong (CU: University of Colorado Boulder)H-Index: 51
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AbstractThe impacts of tectonic deformation on pore structure of the Wufeng-Longmaxi shales in southern China were studied on tectonically deformed shales. Core description, thin-section observatio...