Timothy Kusky | China University of Geosciences(Wuhan) (original) (raw)

Papers by Timothy Kusky

Research paper thumbnail of Head-to-tail plume shrinking contributes to the Hawaiian-Emperor Bend and plume zonation

Research Square (Research Square), Oct 10, 2023

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Research paper thumbnail of Plate Tectonics: The Stabilizer of Earth’s Habitability

Journal of Earth Science, Sep 3, 2023

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Research paper thumbnail of Geochemistry of picrites and associated lavas of a Devonian island arc in the northern Junggar terrane, Xinjiang (NW China): Implications for petrogenesis, arc mantle sources and tectonic setting

Lithos, Oct 1, 2008

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Research paper thumbnail of Spatio-temporal analysis of big data sets of detrital zircon U-Pb geochronology and Hf isotope data: Tests of tectonic models for the Precambrian evolution of the North China Craton

Earth-Science Reviews, Apr 1, 2023

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Research paper thumbnail of Age and genesis of the Neoarchean Algoma-type banded iron formations from the Dengfeng greenstone belt, southern North China Craton: Geochronological, geochemical and Sm–Nd isotopic constraints

Precambrian Research, Oct 1, 2019

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Research paper thumbnail of World's largest known Precambrian fossil black smoker chimneys and associated microbial vent communities, North China: Implications for early life

Gondwana Research, Aug 1, 2007

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Research paper thumbnail of Neoarchean SSZ and MOR ultra-/high-pressure ophiolitic mélanges of the Eastern Hebei Complex, North China Craton: Dynamics of an Archean paleo-subduction zone

Earth-Science Reviews, May 1, 2023

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Research paper thumbnail of Geometry and kinematics of the late Proterozoic Angavo Shear Zone, Central Madagascar: Implications for Gondwana Assembly

Tectonophysics, Apr 1, 2013

Abstract This paper documents the 20 to 60 km wide N–S trending Angavo Shear Zone (ASZ) in centra... more Abstract This paper documents the 20 to 60 km wide N–S trending Angavo Shear Zone (ASZ) in central Madagascar and its tectonic implications by examining its structural styles, kinematics and geometry. Our study indicates that the ASZ is characterized by at least two ductile Late Proterozoic deformation events (D1 and D2) followed by a brittle neotectonic deformation (D3). The early D1 event produced a regionally extensive S1 foliation, stretching/flattening mineral lineation L1 and symmetrical structural fabrics such as recumbent and isoclinal intra-folial folds (F1), implying a flattening deformation. D1 deformational fabrics are locally overprinted by D2 structures. D2 is characterized by a penetrative S2 foliation, shallow south plunging L2 lineation, asymmetric and sheath folds (F2) consistent with a right lateral sense of movement exhibited by delta- and sigma-type porphyroclast systems and asymmetric boudinage fabrics. D2 represents a non-coaxial flow regime formed in a dextral west over east shear zone during a partitioned transpression in response to east–west-directed compression during the assembly of Gondwana. A close resemblance with the Achankovil shear zone in India is noticed; however the continuation of the ASZ in Africa is uncertain.

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Research paper thumbnail of Structural and remote sensing studies of the southern Betsimisaraka Suture, Madagascar

Gondwana Research, Aug 1, 2006

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Research paper thumbnail of Melting-induced fluid flow during exhumation of gneisses of the Sulu ultrahigh-pressure terrane

Lithos, Dec 1, 2010

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Research paper thumbnail of A late Archean tectonic mélange in the Central Orogenic Belt, North China Craton

Tectonophysics, Nov 1, 2013

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Research paper thumbnail of Archean Podiform Chromitites and Mantle Tectonites in Ophiolitic Mélange, North China Craton: A Record of Early Oceanic Mantle Processes

GSA today, 2002

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Research paper thumbnail of On the role of dual active margin collision for exhuming the world’s largest ultrahigh pressure metamorphic belt

Journal of Earth Science, Dec 1, 2012

ABSTRACT A wide variety of tectonic models have been invoked to explain the exhumation of the wor... more ABSTRACT A wide variety of tectonic models have been invoked to explain the exhumation of the world’s largest ultrahigh pressure (UHP) orogenic belt, the Qinling (秦岭)-Dabieshan (大别山)-Sulu (苏鲁) belt in China, and its correlatives in Korea. Most of these models assume that the orogen contains one main collisional suture between the North and South China cratons that collided in the Mesozoic. New field data reveal that this model is too simplistic, and that the collision involved an additional microplate, which initially rifted off the Yangtze craton. This continental microplate was partially subducted beneath an active margin on the North China craton, and subsequently an additional active Andean-style margin developed on the southern margin of the Qinling microplate after collision, leaving the near-vertical microplate wedged between the two thickened and thermally softened margins. The thermo-mechanical environment of collision thus left a cold, thick, and buoyant microplate wedged between two easily deformed margins, which acted as power-law creep channels, accommodating rapid buoyancy-driven rise of a 2 000 km long wedge of the subducted microplate, which became intimately involved with the collisional process. An additional segment of the northern Yangtze craton was subducted to >100 km, and formed a separate wedge that rose alongside the thermally softened margin of the Qinling microcontinent, and was bordered on the south by the recently thermally-softened rift zone where the Qinling microcontinent broke off the Yangtze craton between Late Devonian and Permian times. Recognizing the dual active margins in Qinling-Dabieshan-Sulu orogen and the thermally-softened power-law creep channels sheds new light on understanding exhumation of the world’s largest ultrahigh pressure belt. We propose that this model is generally applicable to other UHP belts worldwide.

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Research paper thumbnail of Alpine-style tectonic nappe stacking in an Archean suture zone: Quantitative structural profile places constraints on orogenic architecture

Gondwana Research, May 1, 2023

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Research paper thumbnail of From subduction initiation to arc–polarity reversal: Life cycle of an Archean subduction zone from the Zunhua ophiolitic mélange, North China Craton

Precambrian Research, Nov 1, 2020

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Research paper thumbnail of Post-collisional Plio-Pleistocene shoshonitic volcanism in the western Kunlun Mountains, NW China: Geochemical constraints on mantle source characteristics and petrogenesis

Journal of Asian Earth Sciences, 2008

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Research paper thumbnail of Structural relationships along a greenstone/shallow water shelf contact, Belingwe greenstone belt, Zimbabwe

Tectonics, Apr 1, 1995

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Research paper thumbnail of Comment and Reply on "Accretion of the Archean Slave province

Geology, 1989

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Research paper thumbnail of North China’s Archean Central Orogenic Belt: An Ophiolitic Mélange-Bearing Witness to Late Archean Oceanic Crust Production and Destruction

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Research paper thumbnail of A Neoarchean Subduction Polarity Reversal Event in the North China Craton: Evidence from 2.5 Ga Mafic Dikes and Coeval Granites

Acta Geologica Sinica-english Edition, Oct 1, 2016

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Research paper thumbnail of Head-to-tail plume shrinking contributes to the Hawaiian-Emperor Bend and plume zonation

Research Square (Research Square), Oct 10, 2023

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Research paper thumbnail of Plate Tectonics: The Stabilizer of Earth’s Habitability

Journal of Earth Science, Sep 3, 2023

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Geochemistry of picrites and associated lavas of a Devonian island arc in the northern Junggar terrane, Xinjiang (NW China): Implications for petrogenesis, arc mantle sources and tectonic setting

Lithos, Oct 1, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Spatio-temporal analysis of big data sets of detrital zircon U-Pb geochronology and Hf isotope data: Tests of tectonic models for the Precambrian evolution of the North China Craton

Earth-Science Reviews, Apr 1, 2023

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Research paper thumbnail of Age and genesis of the Neoarchean Algoma-type banded iron formations from the Dengfeng greenstone belt, southern North China Craton: Geochronological, geochemical and Sm–Nd isotopic constraints

Precambrian Research, Oct 1, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of World's largest known Precambrian fossil black smoker chimneys and associated microbial vent communities, North China: Implications for early life

Gondwana Research, Aug 1, 2007

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Research paper thumbnail of Neoarchean SSZ and MOR ultra-/high-pressure ophiolitic mélanges of the Eastern Hebei Complex, North China Craton: Dynamics of an Archean paleo-subduction zone

Earth-Science Reviews, May 1, 2023

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Geometry and kinematics of the late Proterozoic Angavo Shear Zone, Central Madagascar: Implications for Gondwana Assembly

Tectonophysics, Apr 1, 2013

Abstract This paper documents the 20 to 60 km wide N–S trending Angavo Shear Zone (ASZ) in centra... more Abstract This paper documents the 20 to 60 km wide N–S trending Angavo Shear Zone (ASZ) in central Madagascar and its tectonic implications by examining its structural styles, kinematics and geometry. Our study indicates that the ASZ is characterized by at least two ductile Late Proterozoic deformation events (D1 and D2) followed by a brittle neotectonic deformation (D3). The early D1 event produced a regionally extensive S1 foliation, stretching/flattening mineral lineation L1 and symmetrical structural fabrics such as recumbent and isoclinal intra-folial folds (F1), implying a flattening deformation. D1 deformational fabrics are locally overprinted by D2 structures. D2 is characterized by a penetrative S2 foliation, shallow south plunging L2 lineation, asymmetric and sheath folds (F2) consistent with a right lateral sense of movement exhibited by delta- and sigma-type porphyroclast systems and asymmetric boudinage fabrics. D2 represents a non-coaxial flow regime formed in a dextral west over east shear zone during a partitioned transpression in response to east–west-directed compression during the assembly of Gondwana. A close resemblance with the Achankovil shear zone in India is noticed; however the continuation of the ASZ in Africa is uncertain.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Structural and remote sensing studies of the southern Betsimisaraka Suture, Madagascar

Gondwana Research, Aug 1, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Melting-induced fluid flow during exhumation of gneisses of the Sulu ultrahigh-pressure terrane

Lithos, Dec 1, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A late Archean tectonic mélange in the Central Orogenic Belt, North China Craton

Tectonophysics, Nov 1, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Archean Podiform Chromitites and Mantle Tectonites in Ophiolitic Mélange, North China Craton: A Record of Early Oceanic Mantle Processes

GSA today, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of On the role of dual active margin collision for exhuming the world’s largest ultrahigh pressure metamorphic belt

Journal of Earth Science, Dec 1, 2012

ABSTRACT A wide variety of tectonic models have been invoked to explain the exhumation of the wor... more ABSTRACT A wide variety of tectonic models have been invoked to explain the exhumation of the world’s largest ultrahigh pressure (UHP) orogenic belt, the Qinling (秦岭)-Dabieshan (大别山)-Sulu (苏鲁) belt in China, and its correlatives in Korea. Most of these models assume that the orogen contains one main collisional suture between the North and South China cratons that collided in the Mesozoic. New field data reveal that this model is too simplistic, and that the collision involved an additional microplate, which initially rifted off the Yangtze craton. This continental microplate was partially subducted beneath an active margin on the North China craton, and subsequently an additional active Andean-style margin developed on the southern margin of the Qinling microplate after collision, leaving the near-vertical microplate wedged between the two thickened and thermally softened margins. The thermo-mechanical environment of collision thus left a cold, thick, and buoyant microplate wedged between two easily deformed margins, which acted as power-law creep channels, accommodating rapid buoyancy-driven rise of a 2 000 km long wedge of the subducted microplate, which became intimately involved with the collisional process. An additional segment of the northern Yangtze craton was subducted to >100 km, and formed a separate wedge that rose alongside the thermally softened margin of the Qinling microcontinent, and was bordered on the south by the recently thermally-softened rift zone where the Qinling microcontinent broke off the Yangtze craton between Late Devonian and Permian times. Recognizing the dual active margins in Qinling-Dabieshan-Sulu orogen and the thermally-softened power-law creep channels sheds new light on understanding exhumation of the world’s largest ultrahigh pressure belt. We propose that this model is generally applicable to other UHP belts worldwide.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Alpine-style tectonic nappe stacking in an Archean suture zone: Quantitative structural profile places constraints on orogenic architecture

Gondwana Research, May 1, 2023

Bookmarks Related papers MentionsView impact

Research paper thumbnail of From subduction initiation to arc–polarity reversal: Life cycle of an Archean subduction zone from the Zunhua ophiolitic mélange, North China Craton

Precambrian Research, Nov 1, 2020

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Post-collisional Plio-Pleistocene shoshonitic volcanism in the western Kunlun Mountains, NW China: Geochemical constraints on mantle source characteristics and petrogenesis

Journal of Asian Earth Sciences, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Structural relationships along a greenstone/shallow water shelf contact, Belingwe greenstone belt, Zimbabwe

Tectonics, Apr 1, 1995

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Comment and Reply on "Accretion of the Archean Slave province

Geology, 1989

Bookmarks Related papers MentionsView impact

Research paper thumbnail of North China’s Archean Central Orogenic Belt: An Ophiolitic Mélange-Bearing Witness to Late Archean Oceanic Crust Production and Destruction

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Neoarchean Subduction Polarity Reversal Event in the North China Craton: Evidence from 2.5 Ga Mafic Dikes and Coeval Granites

Acta Geologica Sinica-english Edition, Oct 1, 2016

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Research paper thumbnail of Test of P-wave receiver functions for a seismic velocity and gravity model across the Baikal Rift Zone (by Zhou Z., Thybo H., Tang C-C., Artemieva I.M., et al.)

Geophysical Journal International, 2023

(by Zhou Z., Thybo H., Tang C-C., Artemieva I.M., et al.) The seismic receiver function (RF) tec... more (by Zhou Z., Thybo H., Tang C-C., Artemieva I.M., et al.)

The seismic receiver function (RF) technique is widely used as an economic method to image earth’s deep interior in a large number of seismic experiments. P-wave receiver functions (RFs) constrain crustal thickness and average Vp/Vs in the crust by analysis of the Ps phase and multiples (reflected/converted waves) from the Moho. Regional studies often show significant differences between the Moho depth constrained by RF and by reflection/refraction methods.
We compare the results from RF and controlled source seismology for the Baikal Rift Zone by calculating 1480 synthetic RFs for a seismic refraction/reflection velocity model and processing them with two common RF techniques [H–κ and Common Conversion Point (CCP) stacking]. We compare the resulting synthetic RF structure with the velocity model, a density model (derived from gravity and the velocity model), and with observed RFs.
Our results demonstrate that the use of different frequency filters, the presence of complex phases from sediments and gradual changes in the properties of crustal layers can lead to erroneous interpretation of RFs and incorrect geological interpretations. We suggest that the interpretation of RFs should be combined with other geophysical methods, in particular in complex tectonic regions and that the long-wavelength Bouguer gravity anomaly signal may provide effective calibration for the determination of the correct Moho depth from RF results. We propose and validate a new automated, efficient method for this calibration.

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