Zobrazeno 1 - 10 of 141 pro vyhledávání: '"Tim E. Johnson"'
1
Akademický článek
Changes in orogenic style and surface environment recorded in Paleoproterozoic foreland successions
Autor: Bo Huang, Man Liu, Timothy M. Kusky, Tim E. Johnson, Simon A. Wilde, Dong Fu, Hao Deng, Qunye Qian
Publikováno v: Nature Communications, Vol 14, Iss 1, Pp 1-14 (2023)
Abstract The Earth’s interior and surficial systems underwent dramatic changes during the Paleoproterozoic, but the interaction between them remains poorly understood. Rocks deposited in orogenic foreland basins retain a record of the near surface
Externí odkaz: https://doaj.org/article/68976663793646629fb5a44a182ad736
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2
Akademický článek
Coexisting divergent and convergent plate boundary assemblages indicate plate tectonics in the Neoarchean
Autor: Bo Huang, Tim E. Johnson, Simon A. Wilde, Ali Polat, Dong Fu, Timothy Kusky
Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-13 (2022)
This study reports coexisting Neoarchean divergent and convergent plate boundary rock assemblages, providing new evidence for the operation of plate tectonics 2.55–2.51 billion years ago; and also suggests the subduction zone was warm then.
Externí odkaz: https://doaj.org/article/756af53ffaa24b709fa5f7346f4e6dc0
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3
Akademický článek
No evidence for high-pressure melting of Earth’s crust in the Archean
Autor: Robert H. Smithies, Yongjun Lu, Tim E. Johnson, Christopher L. Kirkland, Kevin F. Cassidy, David C. Champion, David R. Mole, Ivan Zibra, Klaus Gessner, Jyotindra Sapkota, Matthew C. De Paoli, Marc Poujol
Publikováno v: Nature Communications, Vol 10, Iss 1, Pp 1-12 (2019)
Some of Earth’s earliest continental crust has been previously inferred to have formed from partial melting of hydrated mafic crust at pressures above 1.5 GPa (more than 50 km deep), pressures typically not reached in post-Archean continental crust
Externí odkaz: https://doaj.org/article/7ec8b46796a14bc88ba5c9941ac2f6c4
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5
The Fundamental Role of H2O in the Generation of Coeval Sodic and Potassic Granitoids at Continental Arcs: An Example from the Yangtze Block, South China
Autor: Han Qi, Jun-Hong Zhao, Tim E Johnson
Publikováno v: Journal of Petrology. 64
The bulk rock composition of granitoids reflects the composition of their source and the conditions of partial melting, which are functions of the geodynamic setting in which they formed. Granitoids in active continental margins (continental arcs) ar
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::39458f806853cd2a0e5144a69f3f3fbf
https://doi.org/10.1093/petrology/egad024
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6
Two-stage exhumation of deeply subducted continental crust: Insight from zircon, titanite, and apatite petrochronology, Sulu belt of eastern China
Autor: Songjie Wang, Michael Brown, Lu Wang, Tim E. Johnson, Hugo K.H. Olierook, Christopher L. Kirkland, Andrew Kylander-Clark, Noreen J. Evans, Bradley J. McDonald
Publikováno v: GSA Bulletin. 135:48-66
The rates and mechanisms by which deeply subducted continental crust was exhumed back to the surface are not well understood, but can be better characterized using multimineral petrochronology. Here, we combine zircon, titanite, and apatite U-Pb ages
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::101e128bacd35f290194ee54c81374bc
https://doi.org/10.1130/b36309.1
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7
Linking metamorphism and plate boundaries over the past 2 billion years
Autor: Yebo Liu, Ross N. Mitchell, Michael Brown, Tim E. Johnson, Sergei Pisarevsky
Publikováno v: Geology. 50:631-635
Since the Jurassic, there has been a clear spatiotemporal correlation between different types of metamorphism and active convergent plate margins. However, the extent to which this relationship extends into the past is poorly understood. We compared
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::78bfca787d716c7780ae3f1716376863
https://doi.org/10.1130/g49637.1
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8
Boninitic blueschists record subduction initiation and subsequent accretion of an arc–forearc in the northeast Proto-Tethys Ocean
Autor: Tim E. Johnson, Ali Polat, Fred Jourdan, Timothy M. Kusky, Bo Huang, Zhaochu Hu, Dong Fu, Simon A. Wilde, Brian F. Windley
Publikováno v: Geology. 50:10-15
Subduction of oceanic lithosphere is a diagnostic characteristic of plate tectonics. However, the geodynamic processes from initiation to termination of subduction zones remain enigmatic mainly due to the scarcity of appropriate rock records. We repo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::03b40ee0f9d1d77ee3d427b855c860e9
https://doi.org/10.1130/g49457.1
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9
Palaeoarchaean TTGs of the Pilbara and Kaapvaal cratons compared; an early Vaalbara supercraton evaluated
Autor: Jacob A. Mulder, Nicholas J. Gardiner, Christopher L. Kirkland, Tim E. Johnson, Oliver Nebel
Publikováno v: South African Journal of Geology. 124:37-52
The continental crust that dominates Earth’s oldest cratons comprises Eoarchaean to Palaeoarchaean (4.0 to 3.2 Ga) felsic intrusive rocks of the tonalite-trondhjemite-granodiorite (TTG) series. These are found either within high-grade gneiss terran
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e3d5eea60835b3d639c278d3e5b35d4b
https://doi.org/10.25131/sajg.124.0010
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