Article
Geosciences, Multidisciplinary
A. S. Tabaud, P. Stipska, S. Mazur, K. Schulmann, J. Mikova, J. Wong, M. Sun
Summary: The study of rocks samples from GSM in Poland, using geochemistry and isotopic data, revealed the origin and geological evolution of sedimentary rocks in the area, suggesting that it may have been located along the northern periphery of the Gondwana margin, forming in the middle to late Cambrian period.
Article
Geology
Rimpi Dhiman, Sandeep Singh
Summary: The U-Pb SHRIMP and LA-MC-ICP-MS zircon dates from Dalhousie and Dhauladhar granite suggest magmatic cores with weighted mean ages ranging from 900 to 700 Ma. The Cambro-Ordovician continental magmatism in Greater India is believed to have taken place through the reworking of existing Neoproterozoic granite, correlating with the amalgamation of Gondwanaland over granite formed during the break-up of Rodinia. The Dalhousie granite shows higher Rb content and Rb/Sr ratio along with REE enrichment, indicating a more evolved nature compared to Dhauladhar granite.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geosciences, Multidisciplinary
Wanchese M. Saktura, Solomon Buckman, Allen P. Nutman, Jessica Walsh, George Murray
Summary: The Karakoram terrane is a preserved part of peri-Gondwana continental crust in Ladakh, India. It became a part of Eurasia during the Jurassic and its southern margin was an active continental margin represented by the Karakoram Batholith. Geochronological data suggests that the magmatism in the terrane was extinguished during the Late Cretaceous. More studies are needed to understand the geological and tectonic evolution of the southern margin of Eurasia before and after the final continental collision with the Indian continent.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Guang-Hui Wu, Xu Chu, Ming Tang, Weiyong Li, Fukun Chen
Summary: In this study, the differences in orogenic petrological processes between the amalgamation of Rodinia and Gondwana are explored using the time sequence analysis of geochemical proxies in detrital zircons. The results suggest that the Rodinia assembly was dominated by non-arc intraplate magmatism, while the orogenies leading to the assembly of Gondwana may have proceeded in a modern-style plate tectonic manner. These differences in petrological processes might have contributed to the contrasting geochemical and biological evolution following the orogenies.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Hadi Shafaii Moghadam, Qiu-Li Li, William L. Griffin, Xian-Hua Li, Orhan Karsli, Christopher J. Spencer, Jose F. Santos, Maria Kirchenbaur, Sobhi Nasir, Suzanne Y. O'Reilly
Summary: Understanding the crustal growth, reworking, and geodynamics of the northern continental margin of Gondwana during the Ediacaran to Silurian times is crucial for the paleogeographic reconstruction of Gondwana. This study uses various analytical methods to evaluate the magmatic history of this region and obtain relevant detrital zircon data. The results provide valuable insights into the crustal evolution and tectonic activities in the northern Gondwana region.
Article
Geosciences, Multidisciplinary
Marie Pierre Dabard, Alfredo Loi, Pamela Pavanetto, Mattia Alessio Meloni, Natalia Hauser, Massimo Matteini, Antonio Funedda
Summary: This study investigates the sedimentary source areas of the Armorican Massif using U-Pb LA-MC-ICP-MS geochronology on detrital zircons, whole-rock Sm-Nd, and zircon Lu-Hf isotope analysis. It reveals changes in sediment flux characteristics post-Cadomian orogenesis and differences in paleogeographic locations during the Lower Ordovician. The results suggest geological continuity between the Armorican Massif and neighboring massifs, and highlight the importance of accurate sediment provenance analysis for reconstructing paleogeographic affinities.
Article
Geosciences, Multidisciplinary
Carmen Rodriguez, Antonio Castro, Daniel Gomez-Frutos, Gabriel Gutierrez-Alonso, M. Francisco Pereira, Carlos Fernandez
Summary: The Cambro-Ordovician silicic magmatism in the Central Iberian Zone is a voluminous and geochemically unique event, the origin of which is not fully understood. Data analysis suggests that it may be attributed to extensive melting of Ediacaran metasiliciclastic rocks and a Ca-rich component. Fast crustal melting triggered by mafic magma-derived fluids is considered the main cause of the unique features of this magmatic event.
Article
Geosciences, Multidisciplinary
Qingyun Li, Lifei Zhang, Xu Chu, Guibin Zhang, Thomas Bader, Yang Wang, Chenguang Wu
Summary: This study provides detailed insights into the metamorphic evolution and tectonic history of the HP pelitic granulites associated with eclogites from the Kharta Gneiss in the central Himalaya, shedding light on the overall evolution of the Himalayan orogeny.
Article
Geology
Hu PeiYuan, Zhai QingGuo, Zhao GuoChun, Tang Yue, Zhu ZhiCai, Wang Wei, Wu Hao
Summary: Recent geological research has clarified the Late Paleozoic-Mesozoic evolution history of the Tibetan Plateau, but our understanding of its Precambrian-Early Paleozoic evolution remains insufficient. This study presents new data on Early Ordovician granites in the Amdo area of the Lhasa terrane, indicating a post-collisional setting and mantle input in an extensional environment. Insights from this research suggest these granites developed through oceanic subduction and collisional accretion along the northern Gondwana margin.
ACTA PETROLOGICA SINICA
(2021)
Article
Geosciences, Multidisciplinary
Sadrack Felix Toteu, Maarten de Wit, Joseph Penaye, Kerstin Drost, Jennifer Alice Tait, Merlain Houketchang Bouyo, William Randall Van Schmus, Hielke Jelsma, Gaetan Rock Moloto-A-Kenguemba, Adejardo Francisco da Silva Filho, Catherine Lerouge, Moctar Doucoure
Summary: The study clarifies relationships between different blocks within the Central African Fold Belt and reveals the geological evolution of each block.
Article
Geosciences, Multidisciplinary
Clarisse Monteiro Fernandes, Patricia Anselmo Duffles Teixeira, Julio Cezar Mendes
Summary: The study reveals a widespread magmatism in the Aracuai belt during the Neoproterozoic West-Gondwana assembly, with the Alto Chapeu pluton being one of the intrusions formed during this period. Analysis of zircon chemistry provides insights into the crystallization conditions and magmatic differentiation during the evolution of this pluton. The inherited zircon chemistry suggests the presence of continental-like crust at least 70 million years prior to the main granite production events in the Aracuai.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Tatyana Svetlitskaya, Thi Huong Ngo, Peter A. Nevolko, Tuan Anh Tran, Andrey E. Izokh, Roman A. Shelepaev, Trong Hoa Tran, Thi Phuong Ngo, Pavel A. Fominykh, Ngoc Can Pham
Summary: The study reveals a peak of magmatic activity at 247-248 Ma in the Song Hien structure, generating both mafic and felsic units, with two similar peaks at 250 Ma and 241-243 Ma in zircon ages. These results further confirm that the igneous activities in the region were 12 Myr younger than the Emeishan mantle plume, and may be associated with the Indosinian orogeny.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
S. De Clercq, D. Chew, G. O'Sullivan, T. De Putter, J. De Grave, S. Dewaele
Summary: The KAB region in Central Africa is characterized by the poorly understood Karagwe-Ankole belt (KAB), which contains various generations of granites with hypotheses regarding their emplacement. The youngest generation of granites, G4, are associated with Sn-W-Ta ore deposits and are considered to be parental granites. Through geochemical analysis and U-Pb zircon dating, it was found that G4 granites contain xenocrystic zircon, indicating inheritance of older granites or basement rocks. The geochemical variability and presence of xenocrystic zircons suggest localized melting from a heterogeneous source, favoring an intracontinental setting.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Xinxing Liu, Weixin Shi, Juan Zhang, Xiaoyan Zhang, Junfeng Yang, Wei Li
Summary: The Jinzhuping and Changkeng granites in southern Jiangxi Province, China are related to the Helong W-Sn ore field. The Jinzhuping pluton has three distinct phases with different ages, suggesting two types of granitic rocks. These granites have similar geochemical characteristics, high SiO2 and total alkali contents, and are weakly to strongly peraluminous. Hf isotope analysis indicates that the Helong granites formed through partial melting of Late Paleoproterozoic crustal materials in a backarc setting caused by low-angle subduction of the Paleopacific plate.
Article
Geology
Yusef Vesali, Fatemeh Sepidbar, Richard M. Palin, Massimo Chiaradia
Summary: The Jalal Abad magmatic rocks are characterized by high-K and shoshonitic signatures, involving interaction with thick continental crust and generation of magmas through assimilation/fractional crystallization processes with mantle-derived melts.
ORE GEOLOGY REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Antonio Castro, Carmen Rodriguez, Carlos Fernandez, Eugenio Aragon, Manuel Francisco Pereira, Jose Francisco Molina
Summary: The study of Sr-Nd initial isotopic ratios of plutons from the North Patagonian batholith provides insights into a 180 million-year secular evolution involving magma sources and changes in tectonic regime. The results suggest that source composition was influenced by the incorporation of various crustal materials and trench sediments, leading to the generation of batholith magma during periods of fast convergence and high obliquity between plates. The model proposed in the study explains the geochemical variations of Andean batholiths and addresses the absence of ultramafic cumulates in the lower arc crust and continental crust.
Article
Geosciences, Multidisciplinary
Carmen Rodriguez, Manuel Francisco Pereira, Antonio Castro, Gabriel Gutierrez-Alonso, Carlos Fernandez
Summary: This study investigates the bulk rock geochemistry and zircon geochronology of igneous and metaigneous rocks in the Evora gneiss dome, revealing a succession of magmatic and melting events lasting approximately 30 million years between 341-314 Ma. The detailed field relationships of orthomigmatites and host granitic rocks prove crucial in reconstructing the complex sequence of tectono-thermal events. The results suggest the recycling of intermediate-mafic plutonic rocks and support a geodynamic model involving ridge subduction.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Melisa Angeletti, Martim Chichorro, Antonio Castro, Maria Cristina Frisicale, Rita Sola, Luis Vicente Dimieri
Summary: This paper presents new geochemical, geochronological, and isotopic Lu-Hf data from the Siempre Amigos Hills in western Tandilia, Argentina, revealing a heterogeneous Paleoproterozoic crust and potential sanukitoid magmatism after 2.7 Ga. The proposed petrogenetic model explains the presence of geochemical and isotopic evidence of sanukitoid magmatism, which may have occurred after 2.7 Ga, and provides insights into the development of the Rhyacian magmatic arc in the Tandilia Terrane.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Natalia Rodriguez, Juan Diaz-Alvarado, Carlos Fernandez, Christoph Breitkreuz, Paulina Fuentes, Gerardo Merida
Summary: Oblique convergent margins, like the subduction of Phoenix beneath the South American plate during Jurassic and Early Cretaceous times, are characterized by strain partitioning and a positive feedback loop between strike-slip deformation and magma ascent along the magmatic arc. The Flamenco pluton in northern Chile displays a complex structure influenced by these convergent margins, with various domains separated by shear zones that played a key role in the emplacement process.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
M. Liesa, C. Aguilar, A. Castro, G. Gisbert, J. Reche, J. A. Munoz, M. Vila
Summary: The lower structural levels of the Variscan orogen in the Eastern Pyrenees exhibit three genetically associated magmatic suites, formed during the Late Carboniferous to Early Permian in a syn- to post-collisional setting. Geochemical comparisons with neighboring massifs suggest variable degrees of lower crustal assimilation in the granitoids and mafic complexes. Petrogenetic relationships and magma formation processes are inferred based on isotopic compositions and petrographic analysis.
Editorial Material
Geochemistry & Geophysics
Ruben Diez Fernandez, Carlos Fernandez, Ricardo Arenas, Irene Novo-Fernandez
Summary: Geological mapping, structural data, and analytical modeling support the notion that the Central Unit belongs to a rootless Devonian suture zone that underwent late uplift and upright folding. However, other studies overlook this evidence and fail to interpret the structural dip angle accurately in seismic images. Overall, the model proposed by Diez Fernandez et al. remains valid.
Article
Geosciences, Multidisciplinary
Carmen Rodriguez, Antonio Castro, Daniel Gomez-Frutos, Gabriel Gutierrez-Alonso, M. Francisco Pereira, Carlos Fernandez
Summary: The Cambro-Ordovician silicic magmatism in the Central Iberian Zone is a voluminous and geochemically unique event, the origin of which is not fully understood. Data analysis suggests that it may be attributed to extensive melting of Ediacaran metasiliciclastic rocks and a Ca-rich component. Fast crustal melting triggered by mafic magma-derived fluids is considered the main cause of the unique features of this magmatic event.
Article
Geosciences, Multidisciplinary
M. Francisco Pereira, Carlos Fernandez, Carmen Rodriguez, Antonio Castro
Summary: The U-Pb ages of tonalite and migmatite samples from the Central Iberian Zone in Spain indicate a close relationship between Ordovician tonalitic magmatism and high-grade metamorphism. The age constraints on Santa Cruz tonalite and Risco Chico leucogranite provide evidence of a mixed contribution from old Ediacaran magmatic arc rocks and siliciclastic sequences. These findings contribute to the understanding of the Early-Middle Ordovician tectonic evolution of the northern Gondwana margin.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geosciences, Multidisciplinary
Carlos Fernandez, Manuel Diaz-Azpiroz
Summary: This paper demonstrates the application of the monoclinic transpression/transtension model in estimating the kinematic vorticity number of flow, determining the angle between the strikes of extension fractures and shear zones, and evaluating the extension value normal to the extension fractures. The method is validated through comparisons with published analogue experiments and applied to real cases, showcasing its feasibility and robustness.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Geology
Martim Chichorro, Ana Rita Sola, Telmo Bento dos Santos, Joao Lains Amaral, Lourenco Crispim
Summary: This study assessed the age distribution of Cadomian/Pan-African orogenic events in the Iberian Massif using detrital and inherited zircon analysis. The results showed a systematic peak at around 610Ma during the late Neoproterozoic-to-Early Ordovician era, followed by peaks at typical Cadomian ages. Inherited zircons in Cambrian-to-Lower Ordovician igneous rocks also exhibited typical Cadomian ages, but consistently showed a peak at around 610Ma. This suggests that Pan-African magmatism played a significant role in the geological history of the Iberian Massif.
Review
Geosciences, Multidisciplinary
Antonio Pedrera, Jesus Garcia-Senz, Emilio L. Pueyo, Berta Lopez-Mir, Roi Silva-Casal, Juan Diaz-Alvarado
Summary: The kinematic evolution of the Pyrenees was controlled by inherited structural and thermal heterogeneities. This paper presents four restored cross-sections that quantify the cumulative deformation along the Pyrenees and assess the factors behind inhomogeneous lithospheric shortening. The results show complex variations in structural style and amount of shortening, with a proposed tectonic model explaining the shortening gradient.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Jose Manuel Fuenlabrada, Ricardo Arenas, Manuel Francisco Pereira, Esther Rojo Perez, Sonia Sanchez Martinez, Ruben Diez Fernandez
Summary: The Cadomian Orogeny involved the opening and closing of oceanic domains and associated sedimentary basins in the northern margin of Gondwana. These basins are found within autochthonous and allochthonous terranes of the Variscan Orogen in the Iberian Massif. Nd isotope data supports the idea of varying sources along the North Gondwanan margin during the Early Paleozoic.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
A. Herrero-Gil, I. Egea-Gonzalez, A. Jimenez-Diaz, S. Rivas Dorado, L. M. Parro, C. Fernandez, J. Ruiz, I. Romeo
Summary: Large thrust faults on Mars are formed due to lithospheric contraction, and their geometry is related to the mechanical behavior of the lithosphere. Tharsis, the largest volcano-tectonic province on Mars, plays a crucial role in the planet's tectonic pattern.
JOURNAL OF STRUCTURAL GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Jorge Alonso-Henar, Carlos Fernandez, Jose Antonio Alvarez-Gomez, Carolina Canora, Alejandra Staller, Manuel Diaz, Walter Hernandez, Angela Valeria Garcia, Jose Jesus Martinez-Diaz
Summary: The El Salvador Fault Zone is a large transtensional deformation band. A triclinic transtension model was applied to evaluate its characteristics and the study found that this analytical model is useful in the kinematic study of active volcanic arcs.
