Article
Geology
Bo Hui, Yunpeng Dong, Feifei Zhang, Shengsi Sun, Shuai He
Summary: This study presents new insights into the formation of the Neoproterozoic mafic intrusions in the Bikou Terrane, indicating that they were likely derived from partial melting of a mantle wedge source metasomatized by slab-derived melts. The interaction between upwelling enriched asthenospheric mantle and mantle wedge peridotite may have been triggered by the slab rollback process in a subduction-related environment, supporting the persistent subduction-related system along the northwestern margin of the Yangtze Block during the early Neoproterozoic.
ORE GEOLOGY REVIEWS
(2021)
Article
Geography, Physical
Chenlin Hu, Changcheng Han, Jinghui Ma, Wenfeng Wang, Fangyu Zhao, Wenxuan Sun
Summary: This study investigated the sedimentary differentiation and anisotropy of magnetic susceptibility (AMS) of the Tarim Carbonate Platform (TCP) in order to infer the paleowind directions during each epoch of the Cambrian-Ordovician and constrain its paleogeographic location. The results showed that the prevailing wind directions of the Early, Middle, and Late Cambrian were 226 degrees +/- 42 degrees, 207 degrees +/- 43 degrees, and 193 degrees +/- 36 degrees from present north, respectively, while those of the Early, Middle, and Late Ordovician were 178 degrees +/- 39 degrees, 165 degrees +/- 43 degrees, and 155 degrees +/- 52 degrees from present north, respectively.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geochemistry & Geophysics
Zhilin He, Hao Deng, Liang Luo, Tao Xie
Summary: The Yidun terrane in Eastern Tibet is a vital area for studying the evolution of the Garze-Litang ocean and the eastern Tethys. This study focuses on the northern Yidun terrane, revealing three stages of structural deformation and suggesting a possible link between the igneous activity in the area and the late Permian Emeishan volcanic province. The findings indicate that the opening of the Garze-Litang ocean was not directly related to the Emeishan mantle plume but had a significant impact on the eastern Paleo-Tethys tectonic domain during the late Permian.
Article
Geochemistry & Geophysics
Zhi-Yong Li, Ying-De Jiang, Stephen Collett, Pavla Stipska, Karel Schulmann, Sheng Wang, Vasiliy Sukhorukov, Xiu-Juan Bai, Wan-Feng Zhang
Summary: The Olkhon Terrane's collision with the Siberian Craton during the early Paleozoic is investigated using structural observations and geochronology. The study reveals the tectono-metamorphic process and time-scale of this collision, providing insights into the early evolution of the Central Asian Orogenic Belt. The findings highlight the importance of understanding the collisional history of the peri-Siberian orogenic system.
Article
Geochemistry & Geophysics
Yan Zhao, Wenhao Ao, Tao Zhu, Yuhua Hu, Zhibo Tian, Ruiying Zhang, Jiao Zhao
Summary: The petrogenesis and tectonics of Paleoproterozoic granitoid rocks in Dunhuang Terrane have been understudied. Through zircon U-Pb dating, the ages of these rocks have been determined, indicating their origins from mantle wedge, continental crust, and partial melting of ancient crustal rocks. The evolutionary period of Dunhuang Terrane during the assembly of Columbia supercontinent is comparable to neighboring areas.
Review
Geosciences, Multidisciplinary
Ed Landing, J. Duncan Keppie, D. Fraser Keppie, Gerd Geyer, Stephen R. Westrop
Summary: Avalonia is a distinctive region defined by unique uppermost Ediacaran-Ordovician rocks. It has been determined that Avalonia was an insular microcontinent rather than a part of Gondwana, with its origin and movement linked to the Avalonian transform fault (Atf). This finding challenges previous paleogeography and plate tectonics models.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Yan Li, Feng-Jun Nie, Zhao-Bin Yan
Summary: The study focused on the Late Jurassic mafic volcanic rocks from the Badaguan area in northwestern Erguna Block, providing insight into their formation, magma sources, and compositional evolution through detailed petrological, geochemical, and zircon U-Pb dating analysis. The rocks exhibit characteristics consistent with subduction-related igneous rocks and are likely derived from partial melting of metasomatized lithospheric mantle with possible incorporation of subducting sediments. The magmatic evolution included fractional crystallization of Fe and Ti oxides, suggesting lithospheric extension following the closure of the Mongol-Okhotsk Ocean.
Article
Geosciences, Multidisciplinary
Ting Liu, Chunjing Wei, Chuan Yang, Zhuang Li
Summary: The East Hebei terrane in the North China Craton contains mafic granulites that record two episodes of metamorphism. The first episode occurred at ultrahigh temperatures and the second episode at high pressures. Zircon dating suggests that these metamorphic events happened approximately 2.49 billion years and 1.78 billion years ago.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Meng Liu, Haiying Gao
Summary: This study investigates the tectonic evolution of the northwestern part of North America and provides new seismic insights into the impacts of tectonic events on continental formation and evolution. The study analyzes seismic waveforms and detects distinct offsets in Moho depth, indicating the cumulative impacts of tectonic events on crustal modification.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
Jiajun Chen, Dengfa He, Hanyu Huang
Summary: The discovery of a karst-type oil field in the North Tarim uplift has sparked interest in hydrocarbon exploration in deeply buried paleouplifts in northwestern China. The structural evolution and karstification in this region show a spatial-temporal correlation, as indicated by the distribution of karst reservoirs and tectonic relief evolution. The improved understanding of the karst evolution model can provide theoretical guidance for predicting karst reservoirs and future exploration in deep-marine basins associated with multiphase paleouplifts.
Article
Geosciences, Multidisciplinary
Sakine Moradi, Eric H. Christiansen, Shao-Yong Jiang, Mohammad Reza Ghorbani
Summary: Cenozoic volcanic rocks in the Urumieh-Dokhtar magmatic arc in Iran, particularly in the Kahak area, consist of basalt and basaltic andesite. They formed during the Paleocene-Eocene and Miocene periods and their petrogenesis is linked to partial melting of the asthenospheric mantle wedge, which was previously affected by subducted slab components of the Neotethys Ocean.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geology
Jaroslav Dostal, Pierre Jutras
Summary: The Eocene Challis-Kamloops volcanic belt, spanning over 2,000 km, formed within a short time interval from around 55 to 45 million years ago. The volcanic rocks, predominantly high- to medium-K calc-alkaline rocks typical of continental arcs, were extruded during a period of regional transtensional tectonics in the Cordilleran orogen. Initial isotopic ratios and mantle sources suggest isotopically distinct lithospheric mantle sources in the northern and southern parts of the belt, with Precambrian sources enriched in incompatible trace elements.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Munir M. A. Adam, Xinbiao Lv, Douaa Fathy, Abdel Rahman A. Abdel Rahman, Asma A. Ali, Adil S. Mohammed, Esam S. Farahat, Mabrouk Sami
Summary: The integrated study of zircon U-Pb geochronology, geochemistry, and Lu-Hf isotopes on basaltic andesite and andesite from the Haweit area in NE Sudan revealed their formation during the Tonian period. The volcanic rocks are believed to have originated from a depleted mantle source with little crustal contamination, possibly resulting from low degree partial melting of spinel-bearing Iherzolite. The andesitic melts in the region further underwent crustal assimilation during two stages of arc evolution.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geology
Xi Wang, Ran Wang, Pan Qu, Sanyou Cheng, Yonghui Xin
Summary: This study explored the geology of the West Junggar terrain and identified a series of bimodal volcanic rocks. By using zircon U-Pb geochronology and geochemistry, the study determined that these volcanic rocks were formed during the postcollisional tectonic stage of the late Carboniferous, indicating the closure of the Junggar Ocean.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Bo Hui, Yunpeng Dong, Feifei Zhang, Shengsi Sun, Franz Neubauer, Dengfeng He, Shuai He
Summary: This study presents new data on the age, petrogenesis, and tectonic attributes of the granitoids in the Bikou Terrane. The quartz monzonite and monzogranite share the same magma source, while the granodiorite is derived from partial melting of the ancient lower mafic crust. The quartz monzonite samples likely formed through the interaction between slab-derived melt and mantle wedge, while the granodiorite samples formed in a subduction-related setting. These findings provide important evidence for the tectonic regime in the early Neoproterozoic along the northwestern margin of the Yangtze Block.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Karin Sigloch, Mitchell G. Mihalynuk
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2017)
Article
Geochemistry & Geophysics
Dante Canil, Mitch Mihalynuk, Terri Lacourse
Article
Geosciences, Multidisciplinary
Joseph M. English, Mitchell G. Mihalynuk, Stephen T. Johnston
CANADIAN JOURNAL OF EARTH SCIENCES
(2010)
Article
Geosciences, Multidisciplinary
Esther Bordet, Mitchell G. Mihalynuk, Craig J. R. Hart, Jim K. Mortensen, Richard M. Friedman, Janet Gabites
CANADIAN JOURNAL OF EARTH SCIENCES
(2014)
Article
Geochemistry & Geophysics
James M. Logan, Mitchell G. Mihalynuk
Article
Geosciences, Multidisciplinary
Luke P. Beranek, Cees R. van Staal, William C. McClelland, Steve Israel, Mitch G. Mihalynuk
JOURNAL OF THE GEOLOGICAL SOCIETY
(2013)
Article
Multidisciplinary Sciences
Karin Sigloch, Mitchell G. Mihalynuk
Article
Geochemistry & Geophysics
Luke P. Beranek, Cees R. van Staal, William C. McClelland, Steve Israel, Mitch G. Mihalynuk
Article
Geochemistry & Geophysics
Edward J. Clennett, Karin Sigloch, Mitchell G. Mihalynuk, Maria Seton, Martha A. Henderson, Kasra Hosseini, Afsaneh Mohammadzaheri, Stephen T. Johnston, R. Dietmar Mueller
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2020)
Article
Geochemistry & Geophysics
Afsaneh Mohammadzaheri, Karin Sigloch, Kasra Hosseini, Mitchell G. Mihalynuk
Summary: In this study, the mantle structure beneath South America was analyzed using seismic tomography, revealing four high-velocity provinces interpreted as subducted lithosphere. These provinces provide insights into the geodynamic processes in the region over time.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Nestor G. Cerpa, Karin Sigloch, Fanny Garel, Arnauld Heuret, D. Rhodri Davies, Mitchell G. Mihalynuk
Summary: On Earth, the subduction rate of subducting plates at trenches is typically 3 times higher than the migration velocities of trenches. It is also 5 times higher than the estimated sinking rates of lower mantle slabs. Through kinematic analyses, it is predicted that if the present-day kinematic state had operated in the past, the subducting lithosphere should have accumulated and folded beneath near-stationary trenches. These predictions are consistent with seismic tomography, but contradictory to most dynamic-subduction models.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Computer Science, Interdisciplinary Applications
Mitchell G. Mihalynuk, Shannon M. S. Mallory, Brian Grant
COMPUTERS & GEOSCIENCES
(2006)
Article
Geosciences, Multidisciplinary
Dante Canil, Mitchell Mihalynuk, Courtney Charnell
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2006)
Correction
Computer Science, Interdisciplinary Applications
Mitchell G. Mihalynuk, Shannon M. S. Mallory, Brian Grant
COMPUTERS & GEOSCIENCES
(2007)