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Articles de revues sur le sujet « Structural analysis, calc-alkaline magmatism »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

Rodrigues, Rodrigo Antonio de Freitas, Juliana Pertille, Fernanda Gervasoni, et al. "Tonian Continental Arc Magmatism of the Porongos Complex, Dom Feliciano Belt, Southern Brazil." Geologia USP. Série Científica 23, no. 3 (2023): 19–45. http://dx.doi.org/10.11606/issn.2316-9095.v23-208078.

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This study provides new information on the deformation, metamorphism, and tectonic setting of the metavolcanic rocks of the southern portion of the Porongos Complex, southern Brazil. The structural analysis enabled the identification of three deformational phases, formed under ductile to semi-ductile conditions. D1 progressed through deformation partitioning, comprising closed to isoclinal folds and an axial plane foliation. Then, simple shear prevailed, resulting in isoclinal folds, sigma-type porphyroclasts, foliation transposition, and mylonitic rocks. D2 comprises open to gentle folds and

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Prokopyev, I. R., A. G. Doroshkevich, M. D. Varchenko, D. V. Semenova, I. A. Izbrodin, and M. N. Kruk. "MINERALOGY AND ZIRCON AGE OF CARBONATITES OF THE SREDNYAYA ZIMA COMPLEX (EASTERN SAYAN)." Geodynamics & Tectonophysics 15, no. 2 (2024): 0749. http://dx.doi.org/10.5800/gt-2024-15-2-0749.

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The Srednyaya Zima alkaline-ultramafic carbonatite complex is located in the Eastern Sayan and is a part of the area of manifestation of Neoproterozoic rare-metal alkaline-carbonatite magmatism along the southern and southeastern margins of the Siberian craton. Mineralogical studies of calciocarbonatites of the Srednyaya Zima complex have shown the presence of primary magmatic mineral phases of calcite, biotite (annite-phlogopite), ilmenite, and fluorapatite. Pyrochlore, zircon, burbankite, magnetite, rutile, titanite, strontianite, and barite were identified of the accessory minerals. The che

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Belenitskaya, G. A. "On the participation of natural salts in alkaline magmatism. Article 3. Genetic aspects of the model of salt-alkaline interactions." LITHOSPHERE (Russia) 21, no. 2 (2021): 172–97. http://dx.doi.org/10.24930/1681-9004-2021-21-2-172-197.

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Research subject. An analysis of regional and global geological material characterizing the spatio-temporal relationships between alkaline magmatic and saline complexes allowed the author to propose and justify a new geological-genetic model of alkaline magmatism. This model considers saline complexes, located along the paths of the upward movement of deep magmas, as additional sources of alkaline and volatile components.Materials and methods. Three articles are devoted to the discussion and justification of this model. Two articles were devoted to geological aspects of the problem. The prereq

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Grebennikov, A. V., S. A. Kasatkin, and A. I. Khanchuk. "ISOTOPIC AND GEOCHEMICAL ZONALITY OF THE PALEOCENE MAGMATISM IN THE ASIA-PACIFIC TRANSITION ZONE." Tikhookeanskaya Geologiya 43, no. 5 (2024): 54–73. http://dx.doi.org/10.30911/0207-4028-2024-43-5-54-73.

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The diversity of the tholeiitic, alkali or calc-alkali, high-silica, and adakitic rocks (I-, FG- and А-types) in the northeastern margin of Asia often leads to controversial conclusions about the character of magmatism and the active margin evolution in the West Pacific during the Late Mesozoic–Cenozoic. In addition, paleogeodynamic reconstructions of the Asia-Pacific region can only be made based on the synthesis of patterns identified in compositions of magma sources, evolution and character of magmatism, and strain and kinematic analysis of fault tectonics of all parts of the eastern margin

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Bortolozzo, Rômulo, Rafael Rodrigues de Assis, Lorenzzo Cassaro, and Lays Helmer Mengal. "Metallogenic characterization of the Aguinaldo structurally-controlled Epithermal gold occurrence, Alta Floresta Gold Province (Brazil)." Geologia USP. Série Científica 24, no. 4 (2024): 39–62. https://doi.org/10.11606/issn.2316-9095.v24-194388.

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In the eastern-southeast sector of Alta Floresta Gold Province (Amazon Craton), the 1.78 – 1.77 Ga calc-alkaline magmatism is interpreted as answerable for ore-forming processes responsible for its disseminated, vein-type, and filonar gold occurrences hosted in 2.05 – 1.77 Ga units. The Aguinaldo structurally-controlled gold occurrence exhibits ore zones hosted in 0.5 – 1.5m thick quartz + sulfide ± carbonate veins crosscutting the porphyroblastic mylonite orthogneiss, with SHRIMP U-Pb-zircon concordia crystallization age of 1,984.9 ± 5.2 Ma. Distal to ore zones are observed high temperature,

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Lebedev, V. A., G. T. Vashakidze, A. V. Parfenov, and A. I. Yakushev. "The origin of adakite-like magmas in the modern continental ollision zone: evidence from pliocene dacitic volcanism of the Akhalkalaki lava plateau (Javakheti highland, Lesser Kaucasus)." Петрология 27, no. 3 (2019): 327–51. http://dx.doi.org/10.31857/s0869-5903273327-351.

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The paper reports the isotope-geochronological and petrological-geochemical studies of the Pliocene moderately-acid volcanism of the Akhalkalaki Plateau in the central part of the Lesser Caucasus (Javakheti highland, Georgia). K-Ar dating showed that young dacitic lavas and pyroclastic rocks were formed in the Mid-Pliocene (3.28 ± 0.10 Ma) in relation with the explosive–effusive eruptions of small composite volcanic cones and formation of minor extrusive domes confined mainly to the eastern margin of the region. Isotope-geochronological data in the combination with results of structural drilli

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Slaman, L. R., S. M. Barr, C. E. White, and D. van Rooyen. "Age and tectonic setting of granitoid plutons in the Chéticamp belt, western Cape Breton Island, Nova Scotia, Canada." Canadian Journal of Earth Sciences 54, no. 1 (2017): 88–109. http://dx.doi.org/10.1139/cjes-2016-0073.

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Geological mapping in the Chéticamp granitoid belt in combination with petrographic and geochemical studies and U–Pb (zircon) dating by laser ablation inductively coupled plasma mass spectrometry have resulted in major reinterpretation of the geology in the western part of the Ganderian Aspy terrane of Cape Breton Island. Nine new U–Pb (zircon) ages show that the former “Chéticamp pluton” consists of 10 separate plutons of five different ages: late Neoproterozoic (ca. 567 Ma), Cambrian–Ordovician (490–482 Ma), Ordovician–Silurian (442–440 Ma), mid-Silurian (ca. 428 Ma), and late Devonian (366

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Baluev, A. S., Yu V. Brusilovsky, and A. N. Ivanenko. "The crustal structure of Onega-Kandalaksha paleorift identified by complex analysis of the anomalous magnetic field of the White Sea." Geodynamics & Tectonophysics 9, no. 4 (2018): 1293–312. http://dx.doi.org/10.5800/gt-2018-9-4-0396.

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Geological and geophysical studies recently conducted in the White Sea and the adjacent territory have provided new data on the deep structure of this region. Our study aims to conduct complex analysis of the anomalous magnetic field and the geological and geophysical data on the Onega-Kandalaksha paleorift located in the White Sea basin and the adjacent southeastern land area, and to develop a model showing its deep structure. The basis for analysing the magnetic field is the anomalous magnetic field (AMF) map constructed by the authors using the magnetic survey data consolidated by the Marin

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Lawali Idi Chamsi, Sanda Chékaraou Mahamane Moustapha, Ibrahim Maharou Hassane, Hamza Mayaki Issoufou, and Ahmed Yacouba. "Structural relationships of the younger granites of Tirmini (Damagaram south-east, Niger)." World Journal of Advanced Research and Reviews 21, no. 3 (2023): 2201–6. http://dx.doi.org/10.30574/wjarr.2024.21.3.0853.

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The Tirmini anorogenic ring complex is located approximately 25 km west of the town of Zinder, in the pan-African province of Damagaram-Mounio, the southeastern terminus of the Benin-Nigeria Shield. The aim of this study is to characterise the anorogenic deformation affecting the Tirmini younger granites. The petrography of Tirmini evolves from rhyolites to microgranites, granites and quartz alkaline syenite emplaced during anorogenic magmatism in the Permian (295 Ma). Very little structural data is available on the Tirmini complex. Only a cursory study of deformation has been carried out, wit

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Lawali, Idi Chamsi, Chékaraou Mahamane Moustapha Sanda, Maharou Hassane Ibrahim, Mayaki Issoufou Hamza, and Yacouba Ahmed. "Structural relationships of the younger granites of Tirmini (Damagaram south-east, Niger)." World Journal of Advanced Research and Reviews 21, no. 3 (2024): 2201–6. https://doi.org/10.5281/zenodo.14175438.

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The Tirmini anorogenic ring complex is located approximately 25 km west of the town of Zinder, in the pan-African province of Damagaram-Mounio, the southeastern terminus of the Benin-Nigeria Shield. The aim of this study is to characterise the anorogenic deformation affecting the Tirmini younger granites. The petrography of Tirmini evolves from rhyolites to microgranites, granites and quartz alkaline syenite emplaced during anorogenic magmatism in the Permian (295 Ma). Very little structural data is available on the Tirmini complex. Only a cursory study of deformation has been carried out, wit

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Maylin Marisel Mendoza Mondragon. "Lithogeochemical Characterization and Alteration Model to Determine its Implication in the Controls of the Mineralization of the VMS Cerro Lindo Deposit." Journal of Information Systems Engineering and Management 10, no. 12s (2025): 157–65. https://doi.org/10.52783/jisem.v10i12s.1770.

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The objective of this study is to characterize, using lithogeochemistry, the magmatic series and the enclosing rock that took place in the formation of the Cerro Lindo VMS; At the same time, alteration lithogeochemistry was performed to determine the relationship between mineralogy, lithogeochemistry and intensity of alteration, obtaining as a result, vectors towards the center of the system. The primary purpose is to bring this 2D information from the lithogeochemical diagrams to a 3D approach, and thus establish correlations with other mineral occurrence controls (structural, geophysical, ge

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Kalashnyk, G. A. "Results of geological and geophysical research on the Subotska structure of Ingulskiy megablock of the Ukrainian shield." Мінеральні ресурси України, no. 4 (December 28, 2020): 4–12. http://dx.doi.org/10.31996/mru.2020.4.4-12.

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The article presents the results of diamond prospecting studies in the Subotska structure of the Inhulskyi megablock of Ukrainian Shield. For the results, it is indicated that the Subotska structure is mimicked by crater rocks and in some cases by manifestations of the vent facies with signs of kimberlitic-lamproitic magmatism. The typical local features of manifestations of explosive structures from maar volcanism in Subotska area are determined. The article presents the results of petrographic and mineralogical study of the core material from exploratory wells on the Subotska structure, the

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Deng, Shiqi, and Yang Wang. "The Indosinian Granitoids of the Songpan–Garze–West Kunlun Orogenic Belt, China: Distribution, Petrochemistry, and Tectonic Insights." Minerals 14, no. 11 (2024): 1060. http://dx.doi.org/10.3390/min14111060.

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During the Indosinian orogeny, the Songpan–Garze–West Kunlun orogenic belt experienced significant tectonic and magmatic activity, leading to the widespread emplacement of granitoid bodies. This study provides a detailed petrochemical and geochemical analysis of these granitoids, offering new insights into their tectonic settings and magmatic evolution. The granitoids of this belt are systematically categorized into arc calc-alkaline and arc tholeiitic granitoids (ACG and ATG), cordierite peraluminous and muscovite peraluminous granitoids (CPG and MPG), potassium calc-alkaline granitoids (KCG)

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A.M, Shuaibu. "STRUCTURAL ANALYSIS, PETROGRAPHIC STUDY AND GEOCHEMICAL ASSESSMENT OF PAN-AFRICAN GRANITOID, GUSAU SHEET 54SE NORTHWEST NIGERIA." Malaysian Journal of Geosciences 7, no. 1 (2023): 50–63. http://dx.doi.org/10.26480/mjg.01.2023.50.63.

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The study area is underlain by migmatite-gneiss quartzite rock suits with infolding mica schist which is intruded by batholitic Pan-African granitoids. Petrographic studies revealed quartz, orthoclase, hornblende and biotite as major minerals which are common to all members of rock units. The geochemical result of gneissic rock shows SiO2 content that range between 77.04%.wt to 80%.wt while mica schist depicts SiO2 content of 74.42 to 77.42%.wt. this implies silicious protolith for the both rock units. On the discrimination diagram gneiss and mica schist plot mainly in High-K calc-alkaline to

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Zhuravlev, A. I., A. V. Okrugin, B. B. Gerasimov, et al. "Native gold from placers of the Evotinskii region (Aldano-Stanovoy Shield): mineralogical and geochemical features, and possible primary sources." Arctic and Subarctic Natural Resources 29, no. 4 (2024): 511–26. https://doi.org/10.31242/2618-9712-2024-29-4-511-526.

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The Evotinskii Ore and Placer Region (EOR) is located in the central part of the Aldano-Stanovoy Shield and is characterized by a significant presence of gold-bearing placers, many of which have undergone extensive mining activities. Despite geological investigations that have been conducted since the 1930s, the main sources of numerous placers remain largely unidentified. This study employed traditional mineralogical and geochemical methods, along with LA-ICP-MS analysis, to investigate placer gold within the Evotinskii Ore and Placer Region. The findings indicate that native gold within the

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Goodenough, K. M., B. N. Young, and I. Parsons. "The minor intrusions of Assynt, NW Scotland: early development of magmatism along the Caledonian Front." Mineralogical Magazine 68, no. 4 (2004): 541–59. http://dx.doi.org/10.1180/0026461046840207.

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AbstractThe Assynt Culmination of the Moine Thrust Belt, in the northwest Scottish Highlands, contains a variety of Caledonian alkaline and calc-alkaline intrusions that are mostly of Silurian age. These include a significant but little-studied suite of dykes and sills, the Northwest Highlands Minor Intrusion Suite. We describe the structural relationships of these minor intrusions and suggest a classification into seven swarms. The majority of the minor intrusions can be shown to pre-date movement in the Moine Thrust Belt, but some appear to have been intruded during the period of thrusting.

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Fyson, W. K., and H. Helmstaedt. "Structural patterns and tectonic evolution of supracrustal domains in the Archean Slave Province, Canada." Canadian Journal of Earth Sciences 25, no. 2 (1988): 301–15. http://dx.doi.org/10.1139/e88-032.

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A new plate-tectonic model accounts for lithological relations and regional structural patterns in late Archean supracrustal domains of the Slave Province. Multiple dykes and pillowed mafic flows, most common in the western part of the province, suggest sea-floor spreading. The mafic volcanics, lying in narrow homoclinal belts stratigraphically below more extensive turbidites, are viewed as megaxenolithic remnants of oceanic crust preserved on the periphery of granitoid plutons and blocks of sialic crust. Closure of an oceanic basin was marked by emplacement of the granitoid plutons and coeval

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Widana, Kurnia Setiawan, and Bambang Priadi. "Karakteristik Unsur Jejak Dalam Diskriminasi Magmatisme Granitoid Pulau Bangka." EKSPLORIUM 36, no. 1 (2015): 1. http://dx.doi.org/10.17146/eksplorium.2015.36.1.2766.

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Geologi Pulau Bangka disusun oleh variasi granit sebagai Granitoid Klabat yang tersebar di berbagai lokasi. Unsur jejak dapat diaplikasikan dalam diskriminasi magmatisme dalam pembentukan granitoid tersebut. Tujuan penelitian ini adalah mengetahui karakteristik granitoid yang tersebar di Pulau Bangka berdasarkan geokimia unsur jejak untuk diaplikasikan dalam mempelajari magmatisme, sumber dan situasi tektoniknya.Metode analisis geokimia yang diaplikasikan dengan menggunakan Analisis Aktivasi Neutron (AAN) dan portableX-Ray Fluorescence (pXRF) untuk analisis kualitatif dan kuantitatif pada 27 s

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Percival, J. A., V. McNicoll, and A. H. Bailes. "Strike-slip juxtaposition of ca. 2.72 Ga juvenile arc and >2.98 Ga continent margin sequences and its implications for Archean terrane accretion, western Superior Province, Canada." Canadian Journal of Earth Sciences 43, no. 7 (2006): 895–927. http://dx.doi.org/10.1139/e06-039.

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The North Caribou terrane of the western Superior Province attained continental thickness (~35 km) by 2997 Ma. It records a subsequent 300 million years history of continental fragmentation, arc magmatism, and terrane accretion. At Lake Winnipeg the ~2978 Ma Lewis–Storey quartzite–komatiite–iron formation assemblage marks Mesoarchean breakup. Unlike the relatively continuous 2980–2735 Ma stratigraphic record of the Red Lake and Birch–Uchi greenstone belts to the east, little of this interval is recorded at Lake Winnipeg. Rather, two belts of younger, juvenile rocks are tectonically juxtaposed:

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Xu, Nan, Cai-lai Wu, Yuan-Hong Gao, Min Lei, Kun Zheng, and Dong Gao. "Tectonic evolution of the South Altyn, NW China: constraints by geochemical, zircon U–Pb and Lu–Hf isotopic analysis of the Palaeozoic granitic plutons in the Mangya area." Geological Magazine 157, no. 7 (2020): 1121–43. http://dx.doi.org/10.1017/s0016756820000126.

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AbstractThe South Altyn Orogenic Belt (SAOB) is one of the most important orogenic belts in NW China, consisting of the South Altyn Continental Block and the Apa–Mangya Ophiolitic Mélange Belt. However, its Palaeozoic tectonic evolution is still controversial. Here, we present petrological, geochemical, zircon U–Pb and Lu–Hf isotopic data for the Mangya plutons with the aim of establishing the Palaeozoic tectonic evolution. We divide the Early Palaeozoic magmatism in the Apa–Mangya Ophiolitic Mélange Belt into four episodes and propose a plate tectonic model for the formation of these rocks. D

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Cui, Yao, and J. K. Russell. "Magmatic origins of calc-alkaline intrusions from the Coast Plutonic Complex, southwestern British Columbia." Canadian Journal of Earth Sciences 32, no. 10 (1995): 1643–67. http://dx.doi.org/10.1139/e95-131.

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Major element, trace element, and rare earth element data are presented for Permian to Tertiary calc-alkaline plutonic and volcanic rocks along a transect across the southern Coast Plutonic Complex from Vancouver to Anderson Lake. Late Jurassic to Late Cretaceous plutons are divided into two compositional suites based on mineralogy: (1) the hornblende intrusive suite (tonalite, quartz diorite, diorite, and gabbro) characterized by abundant modal hornblende and little or no K-feldspar, and (2) the K-feldspar intrusive suite (mainly granite and granodiorite) containing significant modal K-feldsp

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Abdelfadil, Khaled M., Sherif Mansour, Asran M. Asran, et al. "Composite Granitic Plutonism in the Southern Part of the Wadi Hodein Shear Zone, South Eastern Desert, Egypt: Implications for Neoproterozoic Dioritic and Highly Evolved Magma Mingling during Volcanic Arc Assembly." Minerals 14, no. 10 (2024): 1002. http://dx.doi.org/10.3390/min14101002.

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The Abu Farayed Granite (AFG), located in the southeastern desert of Egypt, was intruded during the early to late stages of Pan-African orogeny that prevailed within the Arabian–Nubian Shield. The AFG intrudes an association of gneisses, island arc volcano–sedimentary rocks, and serpentinite masses. Field observations, supported by remote sensing and geochemical data, reveal a composite granitic intrusion that is differentiated into two magmatic phases. The early granitic phase comprises weakly deformed subduction-related calc–alkaline rocks ranging from diorite to tonalite, while the later en

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Ariani, Rizky Putri, and Hari Wiki Utama. "Petrogenesis and Geological Structure of Tantan Granitoid in Sungai Manau District, Merangin Regency, Jambi Province." EKSPLORIUM 43, no. 2 (2023): 79. http://dx.doi.org/10.17146/eksplorium.2022.43.2.6415.

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Tantan granitoids are Late Triassic–Early Jurassic age intrusive rocks that are quite extensive and can be partially found in Sungai Manau Sub-district, Merangin Regency, Jambi Province. Tantan granitoids are found in the Barisan Hills physiography, a magmatic arc line on Sumatra Island. Tantan granitoids are interesting to observe to explain rock formation. The petrographic and XRF analyses can provide insight into the intrusive rock type, its relationship to the tectonic framework, and magmatism. The trend of potential mineral resources can be interpreted based on the granitoid-type approach

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Wang, Kun, Dan Yang, Ke-Jun Hou, and Qian Wang. "In Situ LA-ICP-MS U-Pb Geochronology, Sr-Nd-Hf Isotope and Trace Element Analysis of Volcanic Rocks from the Gacun Volcanic-Hosted Massive Sulfide Deposit in Sichuan, China." Minerals 13, no. 7 (2023): 881. http://dx.doi.org/10.3390/min13070881.

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The Gacun deposit is a typical Volcanic Hosted Massive Sulfide (VHMS) associated with Late Triassic seafloor calc-alkaline felsic volcanics. Studies of zircon ages, petrology, major and trace element geochemistry, and Sr-Nd-Hf isotope geochemistry of volcanic rocks from the Northern Yidun arc were undertaken in this paper. We reshaped the Gacun magmatic system activity time, defined the origin of magma evolution, and proposed a metallogenic model of the deposit. Whole-rock major element compositions of the magmatic rocks in the Northern Yidun island arc indicate that they are a complete basalt

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Korovin, Dmitriy Dmitrievich. "Geochemical features of the devonian plutonic rocks of the Reftinsky massif (Middle Urals)." NEWS of the Ural State Mining University 1, no. 1 (2022): 13–21. http://dx.doi.org/10.21440/2307-2091-2022-1-13-21.

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This article examines the Devonian plutonic rocks of two massifs – Khomutinsky and Yuzhno-Khomutinsky, which are located in the western part of the Reftinsky massif. The rocks of the Khomutinsky and Yuzhno-Khomutinsky massifs are divided into gabbroid and granitoid associations. Their chemical composition, the content of pertrogenic, rare and trace elements were studied. Based on the data obtained, the rocks were assigned to the calc-alkaline series, according to the ratio of sodium and potassium, they are rocks with a sodium type of alkalinity. The peculiarity of the studied formations lies i

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Muhtar, M. N., Chang-Zhi Wu, M. Santosh, et al. "Late Paleozoic tectonic transition from subduction to post-collisional extension in Eastern Tianshan, Central Asian Orogenic Belt." GSA Bulletin 132, no. 7-8 (2019): 1756–74. http://dx.doi.org/10.1130/b35432.1.

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Abstract Late Paleozoic large-scale transcurrent tectonics and synkinematic intrusions are prominent features in the Eastern Tianshan segment of the southwestern Central Asian Orogenic Belt. However, the spatial and temporal relationship between synkinematic intrusions and crustal-scale shear zones remains unclear. Here we report petrology, geochemistry, and geochronology of the Qiziltag pluton associated with the Kanggur-Huangshan Shear Zone (KHSZ) with a view to characterize the spatial and temporal relationship between synkinematic intrusions and large-scale transcurrent shearing. Field rel

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Kilias, Adamantios. "The Alpine Geological History of the Hellenides from the Triassic to the Present—Compression vs. Extension, a Dynamic Pair for Orogen Structural Configuration: A Synthesis." Geosciences 14, no. 1 (2023): 10. http://dx.doi.org/10.3390/geosciences14010010.

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In this paper, the Hellenic orogenic belt’s main geological structure and architecture of deformation are presented in an attempt to achive a better interpretation of its geotectonic evolution during Alpine orogeny. This study was based not only on recent research that I and my collaborators conducted on the deformational history of the Hellenides but also on more modern views published by other colleagues concerning the Alpine geotectonic reconstruction of the Hellenides. The structural evolution started during the Permo–Triassic time with the continental breaking of the supercontinent Pangea

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HaraHap, Bhakti H. "Magma Genesis in Kabanjahe Region Continental Margin Arc of Sumatra." Indonesian Journal on Geoscience 6, no. 2 (2011): 105–27. http://dx.doi.org/10.17014/ijog.6.2.105-127.

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DOI: 10.17014/ijog.v6i2.120Volcanic rocks in Kabanjahe region, Karo Regency, North Sumatra Province, are products of old Toba Caldera, Sibayak Volcano, and Sipiso-piso Volcano. Rhyolitic tuff is the main lithology distributed over a large area in this region. Others are basaltic, basaltic andesitic, andesitic, dacitic, and rhyolitic lavas. Data show that the rock was originated from magma of a continental origin formed at a subduction zone environment. Petrogenetic modelling suggests that the range in composition was mainly controlled by a fractional crystallization of plagioclase, clinopyroxe

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Wang, Wenyi, Shuang Tan, Jianjun Wan, Xuelian Hu, Haoyang Peng, and Chengdong Liu. "Insights from Dikes for Multistage Granitic Magmatism in the Huayangchuan Uranium Polymetallic Deposit, Qinling Orogen." Minerals 14, no. 3 (2024): 261. http://dx.doi.org/10.3390/min14030261.

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The Huayangchuan U-polymetallic deposit in the Qinling Orogen is a newly verified carbonatite-hosted deposit on the southern margin of the North China Craton (NCC) in Central China. Granitic magmatism is extensively developed in the Huayangchuan deposit area and is lacking analysis on the reasons for these situations; however, its ages, petrogenesis, and relationship with uranium mineralization are not well constrained. Zircon U–Pb ages for the hornblende-bearing granite porphyry and medium-fine-grained biotite granites in close proximity to carbonatite rocks are 229.8 ± 1.1 and 135.3 ± 0.6 Ma

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MacLachlan, Kate, and Greg Dunning. "U-Pb ages and tectono-magmatic evolution of Middle Ordovician volcanic rocks of the Wild Bight Group, Newfoundland Appalachians." Canadian Journal of Earth Sciences 35, no. 9 (1998): 998–1017. http://dx.doi.org/10.1139/e98-050.

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The Wild Bight Group and spatially associated South Lake Igneous Complex form one of the Ordovician oceanic terranes of the central mobile belt of the Newfoundland Appalachians. An integrated study of these rocks, involving detailed mapping, geochemistry, Sm-Nd isotopic analyses and U-Pb geochronology, has shown that there are two temporally and genetically distinct volcanic sequences within the Wild Bight Group. The younger sequence comprises a lower volcanic succession associated with coarse volcaniclastic rocks and an upper volcanic succession interbedded with argillite, chert, and minor gr

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Kuzmenkova, O. F., A. G. Laptsevich, and A. A. Nosova. "The upper devonian magmatic complexes of the South-East Belarus." Doklady of the National Academy of Sciences of Belarus 64, no. 5 (2020): 599–608. http://dx.doi.org/10.29235/1561-8323-2020-64-5-599-608.

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For the first time, the authors determined lateral-temporal series of magmatic complexes of the Late Frasnian-Early Famennian Pripyat-Dnieper Magmatic Area according to the results of petrological and geochemical study of rocks of the Pripyat-Dnieper Magmatic Area (north-western part of the Pripyat-Dnieper-Donetsk Magmatic Province) in the southwest of the East European Platform using the principles of structural-material analysis and taking into account previous studies. The series consists of four complexes, formed during stages of magmatic activity, separated by time intervals: Zhlobin Comp

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BOZKURT, ERDİN, JOHN A. WINCHESTER, MUHARREM SATıR, QUENTIN G. CROWLEY, and CHRISTIAN J. OTTLEY. "The Almacık mafic-ultramafic complex: exhumed Sakarya subcrustal mantle adjacent to the İstanbul Zone, NW Turkey." Geological Magazine 150, no. 2 (2012): 254–82. http://dx.doi.org/10.1017/s0016756812000556.

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AbstractThe Almacık Mountains in northwestern Turkey expose an upper-amphibolite-facies complex consisting of alternating ultramafic (harzburgitic and websteritic) and mafic (metagabbroic) rock types. In the eastern part of this complex are island arc meta-tholeiites and transitional to calc-alkaline metabasites that are chemically quite similar to those of the Permo-Triassic Çele mafic complex north of Bolu, and this suggests an equivalence. However, much of the section exposes structurally deeper and chemically different mafic and ultramafic rocks, which have no equivalent in the Çele mafic

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Hamdy Ahmed Mohamed, AWAD, ALI Ibrahim Abu El-Leil, NASTAVKIN Aleksey Valer’evich, et al. "Geological and Tectonic Setting of Andesitic Rock in Central Eastern Desert, Egypt." NEWS of the Ural State Mining University, no. 2 (June 15, 2021): 7–15. http://dx.doi.org/10.21440/2307-2091-2021-2-7-15.

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Objective. The current study aims to detect the geologic features, geochemical characteristics and tectonic setting of the investigated rock using field observations and geochemical analyses. Research methods. This work contains both field work (Collection samples and drawing of a new geological map) and laboratory work (preparation of thin sections for petrographic studies by polarizing microscope), X-ray Fluorescence analysis (XRF) in Institute of Biology, Southern Federal University and Mass-Spectrometer with Inductively Coupled Plasma (ICPMS) at the central Laboratory of Russian Geological

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Kang, Wenbin, Kai Weng, Kai Cao, Xiaojian Zhao, and Yongwei Gao. "Petrogenesis of Carboniferous-Permian Granitoids in the Kumishi Area of Tianshan, China: Insights into the Geodynamic Evolution Triggered by Subduction and Closure of the South Tianshan Ocean." Minerals 14, no. 8 (2024): 811. http://dx.doi.org/10.3390/min14080811.

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Late Carboniferous–Early Permian granitoids are widespread in the Tianshan area and their tectonic setting is controversially discussed. Our research presents fresh whole-rock geochemical and Pb isotopic data, along with zircon U-Pb ages and Hf isotopic data for representative monzonitic and granitic intrusions in the Kumishi area. The aim is to decipher their magma sources and illuminate their geodynamic evolution. Zircon U-Pb dating results reveal that biotite monzonites in the Central Tianshan Belt were emplaced at 312.7 ± 2.9 Ma, while the quartz-monzonites and syenogranites in the South T

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He, Tongtong, Yuxi Wang, Jing Yan, et al. "The Orogeny Transition of the Southern Beishan Orogenic Belt During the Early–Middle Devonian: Evidence from the Wudaomingshui Volcanic Rocks and Granite." Minerals 15, no. 6 (2025): 632. https://doi.org/10.3390/min15060632.

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The Southern Beishan Orogenic Belt (SBOB), an integral part of the Southern Central Asian Orogenic Belt (CAOB), is characterized by extensive Late Paleozoic magmatism. These igneous rocks are the key to studying the tectonic evolution process and the ocean–continent tectonic transformation in the southern margin of the CAOB and Paleo-Asian Ocean. We present zircon U-Pb chronology, in situ Lu-Hf isotopes, and whole-rock geochemistry data for Early–Middle Devonian volcanic rocks in the Sangejing Formation and granites from the Shuangyingshan-Huaniushan (SH) unit in the SBOB. The Wudaomingshiu vo

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Johnson, Susan C., Leslie R. Fyffe, Malcolm J. McLeod, and Gregory R. Dunning. "U–Pb ages, geochemistry, and tectonomagmatic history of the Cambro-Ordovician Annidale Group: a remnant of the Penobscot arc system in southern New Brunswick?1This article is one of a series of papers published in this CJES Special Issue: In honour of Ward Neale on the theme of Appalachian and Grenvillian geology." Canadian Journal of Earth Sciences 49, no. 1 (2012): 166–88. http://dx.doi.org/10.1139/e11-031.

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The Penobscot arc system of the northeastern Appalachians is an Early Cambrian to early Tremadocian (ca. 514–485 Ma) ensialic to ensimatic arc–back-arc complex that developed along the margin of the peri-Gondwanan microcontinent Ganderia. Remnants of this Paleozoic arc system are best preserved in the Exploits Subzone of central Newfoundland. Correlative rocks in southern New Brunswick are thought to occur in the ca. 514 Ma Mosquito Lake Road Formation of the Ellsworth Group and ca. 497–493 Ma Annidale Group; however in the past, the work that has been conducted on the latter has been of a pre

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Kilias, Ad, A. Vamvaka, G. Falalakis, et al. "The Mesohellenic trough and the Thrace Basin. Two Tertiary molassic Basins in Hellenides: do they really correlate?" Bulletin of the Geological Society of Greece 47, no. 2 (2017): 551. http://dx.doi.org/10.12681/bgsg.11082.

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Based on lithostratigraphic and structural data, as well as geological mapping, the mollasic Thrace Basin (ThB) in NE Greece (including the Paleogene deposits of the Axios Basin) was compared with the Mesohellenic Trough (MHT) in NW Greece. Both basins are characterized by a thick sedimentary sequence of molassic-type strata (3-5km thickness) of Tertiary age, overlain unconformably by Miocene- Pliocene and Quaternary deposits. Molassic sedimentation started almost simultaneously in both areas during the Mid-Upper Eocene but it finished in different time, in the Mid-Upper Miocene for the MHT an

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Teng, Chao, Meiling Dong, Xinjie Yang, et al. "Zircon U-Pb Geochronology and Geochemical Constraints of Tiancang Granites, Southern Beishan Orogenic Belt: Implications for Early Permian Magmatism and Tectonic Evolution." Minerals 15, no. 4 (2025): 426. https://doi.org/10.3390/min15040426.

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The Beishan Orogenic Belt, situated along the southern margin of the Central Asian Orogenic Belt, represents a critical tectonic domain that archives the prolonged subduction–accretion processes and Paleo-Asian Ocean closure from the Early Paleozoic to the Mesozoic. Early Permian magmatism, exhibiting the most extensive spatial-temporal distribution in this belt, remains controversial in its geodynamic context: whether it formed in a persistent subduction regime or was associated with mantle plume activity or post-collisional extension within a rift setting. This study presents an integrated a

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Macdonald, Ray, and Douglas J. Fettes. "The tectonomagmatic evolution of Scotland." Transactions of the Royal Society of Edinburgh: Earth Sciences 97, no. 3 (2006): 213–95. http://dx.doi.org/10.1017/s0263593300001450.

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ABSTRACTScotland has a magmatic record covering much of the period 3100–50 Ma. In this review, we pull together information on Scotland's igneous rocks into a continuous story, showing how magmatic activity has contributed to the country's structural development and assessing whether the effects of older magmatic events can be recognised in later episodes.The oldest igneous rocks are part of supracrustal sequences within the Lewisian Gneiss Complex, formed when Scotland was part of the supercontinent Kenorland. The supracrustal rocks were intruded between 3100 and 2800 Ma by granodiorites and

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El-Desoky, Hatem M., Andongma W. Tende, Ahmed M. Abdel-Rahman, et al. "Hydrothermal Alteration Mapping Using Landsat 8 and ASTER Data and Geochemical Characteristics of Precambrian Rocks in the Egyptian Shield: A Case Study from Abu Ghalaga, Southeastern Desert, Egypt." Remote Sensing 14, no. 14 (2022): 3456. http://dx.doi.org/10.3390/rs14143456.

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This study evaluates the geological attributes of rocks within the Abu Ghalaga area using spatial, geochemical, and petrographic approaches. ASTER and Landsat imagery processed using band ratio and principal component analysis were used to map hydrothermal alterations, while a regional tectonic evaluation was based on automated extraction of lineaments from a digital elevation model. Geochemical and petrographic analyses were then employed for discrete scale evaluation of alteration patterns of rocks across the study location. Based on satellite image processing, alteration patterns across the

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Martínez, Amancay, Adrian Gallardo, Melisa Mulé, Aldo Giaccardi, Esteban Crespo, and David Aguilera. "New insights into the Permian-Triassic magmatism of southern Cerro Cacheuta, Argentina." Earth Sciences Research Journal 27, no. 4 (2024): 343–54. http://dx.doi.org/10.15446/esrj.v27n4.107538.

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The igneous rocks of Cerro Cacheuta are considered a typical expression of the Permian-Triassic magmatism within the Andes Precordillera of Mendoza, Argentina. In particular, the southwestern margin of this hilltop is characterised by intermediate volcanic and felsic intrusives from the Choiyoi Group, one of the most extensive volcano-sedimentary suites of southern South America. The Choiyoi magmatism is widely associated with dramatic tectonic and environmental changes in the Gondwana supercontinent. Therefore, a better characterisation of the igneous facies of Cerro Cacheuta is critical to u

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Nogueira, Bruna Karine Correa, Paulo Sergio de Sousa Gorayeb, Elton Luiz Dantas, Rafael Estumano Leal, and Marco Antonio Galarza. "Rhyacian evolution of the eastern São Luís Craton: petrography, geochemistry and geochronology of the Rosário Suite." Brazilian Journal of Geology 47, no. 2 (2017): 275–99. http://dx.doi.org/10.1590/2317-4889201720160114.

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ABSTRACT: The São Luís Cráton comprises an area between northeast Pará state and northwest Maranhão that exposes Paleoproterozoic granitic suites and meta-volcanosedimentary sequences. In the east of this geotectonic unit, about 70 km south of São Luís, there is a portion of the São Luís Craton, represented by the intrusive Rosario Suite (RS). This work is focused on rocks of this suite, including petrographic, lithochemical and geochronological studies to understand the crustal evolution of these granitoid rocks. The rock spectrum varies from tonalitic to granodioritic, quartz dioritic and gr

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Petterson, M. G. "The plutonic crust of Kohistan and volcanic crust of Kohistan–Ladakh, north Pakistan/India: lessons learned for deep and shallow arc processes." Geological Society, London, Special Publications 483, no. 1 (2018): 123–64. http://dx.doi.org/10.1144/sp483.4.

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AbstractThe Kohistan–Ladakh terrane, northern Pakistan/India, offers a unique insight into whole-arc processes. This research review presents summaries of fundamental crustal genesis and evolution models. Earlier work focused on arc sequence definition. Later work focused on holistic petrogenesis. A new model emerges of an unusually thick (c. 55 km) arc with a c. 30 km-thick batholith. Volatile-rich, hornblende ± garnet ± sediment assimilation-controlled magmatism is predominant. The thick batholith has a complementary mafic–ultramafic residue. Kohistan crustal SiO2 contents are estimated at &

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Kamali, Amin Allah, Mohsen Moayyed, Nasir Amel, et al. "Mineralogy, mineral chemistry and thermobarometry of post-mineralization dykes of the Sungun Cu–Mo porphyry deposit (Northwest Iran)." Open Geosciences 12, no. 1 (2020): 764–90. http://dx.doi.org/10.1515/geo-2020-0009.

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AbstractThe Sungun copper–molybdenum porphyry deposit is located in the north of Varzaghan, northwestern Iran. The Sungun quartz-monzonite is the oldest mineralized intrusive body in the region and was emplaced during the Early Miocene. Eight categories of the late and unmineralized dykes, which include quartz diorite, gabbrodiorite, diorite, dacite, microdiorite and lamprophyre (LAM), intrude the ore deposit. The main mineral phases in the dykes include plagioclase, amphibole and biotite, with minor quartz and apatite and secondary chlorite, epidote, muscovite and sericite. The composition of

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Derbeko, I. M. "Late Mesozoic Adakite Granites in the Northern Framing of the Eastern Flank of the Mongol–Okhotsk Orogenic Belt." Геохимия 68, no. 1 (2023): 69–82. http://dx.doi.org/10.31857/s0016752523010028.

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The examination of original and available petrochemical, geochemical, and isotope (Sm-Nd, Rb-Sr) data showed that subalkaline granitoids in the northern framing of the eastern flank of the Mongol–Okhotsk orogenic belt belong to the adakite series. The granitoids are characterized by high Sr/Y, Sr, Al2O3, and LREE, extremely low HREE concentrations, and the absence of negative Eu anomalies. The results obtained and the analysis of the geodynamic setting of their formation made it possible to assume that the granitoids were formed at a depth of more than 45 km through melting of garnet-bearing (

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Martinez, Amancay, Adrian Gallardo, Laura Giambiagi, and Laura Tobares. "The Choiyoi Group in the Cordón del Plata range, western Argentina: structure, petrography and geochemistry." Earth Sciences Research Journal 24, no. 2 (2020): 121–32. http://dx.doi.org/10.15446/esrj.v24n2.79515.

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The Choiyoi Group from the Permo-Triassic, is one of the most conspicuous volcano-sedimentary suites of southern South America, considered critical to understand the geological evolution of the western margins of Gondwana. In this regard, petrography, geochemistry, and structural data were examined to better elucidate the physical character and emplacement conditions of the unit in the Cordon del Plata range, within the Frontal Cordillera of Mendoza, Argentina. The site is representative of the magmatism and deformation through different Andean cycles. Results of the study indicate three litho

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Bergman, Stefan, and Pär Weihed. "Chapter 3 Archean (>2.6 Ga) and Paleoproterozoic (2.5–1.8 Ga), pre- and syn-orogenic magmatism, sedimentation and mineralization in the Norrbotten and Överkalix lithotectonic units, Svecokarelian orogen." Geological Society, London, Memoirs 50, no. 1 (2020): 27–81. http://dx.doi.org/10.1144/m50-2016-29.

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AbstractTwo lithotectonic units (the Norrbotten and Överkalix units) occur inside the Paleoproterozoic (2.0–1.8 Ga) Svecokarelian orogen in northernmost Sweden. Archean (2.8–2.6 Ga and possibly older) basement, affected by a relict Neoarchean tectonometamorphic event, and early Paleoproterozoic (2.5–2.0 Ga) cover rocks constitute the pre-orogenic components in the orogen that are unique in Sweden. Siliciclastic sedimentary rocks, predominantly felsic volcanic rocks, and both spatially and temporally linked intrusive rock suites, deposited and emplaced at 1.9–1.8 Ga, form the syn-orogenic compo

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Mills, Andrea, and Hamish Sandeman. "Lithostratigraphy and lithogeochemistry of Ediacaran alkaline basaltic rocks of the Musgravetown Group, Bonavista Peninsula, northeastern Newfoundland, Canada: an extensional volcanogenic basin in the type-Avalon terrane." Atlantic Geology 57 (August 5, 2021): 207–34. http://dx.doi.org/10.4138/atlgeol.2021.010.

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Volcanic rocks of the Ediacaran Musgravetown Group on Bonavista Peninsula, Avalon terrane, Newfoundland, include basal ca. 600 Ma calc-alkaline basalt succeeded by continental tholeiite and alkaline rhyolite of the ca. 592 Ma Plate Cove volcanic belt (Bull Arm Formation), indicating a change from subduction-related to extensionrelated tectonic regimes during that interval. Alkalic basalts on northeastern (Dam Pond area) and southwestern (British Harbour area) Bonavista Peninsula occur below and above, respectively, the ca. 580 Ma glacial Trinity facies. Dam Pond basalt occurs in a structural d

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Ge, Mao-Hui, Jin-Jiang Zhang, Long Li, and Kai Liu. "Ages and geochemistry of Early Jurassic granitoids in the Lesser Xing’an–Zhangguangcai Ranges, NE China: Petrogenesis and tectonic implications." Lithosphere 11, no. 6 (2019): 804–20. http://dx.doi.org/10.1130/l1099.1.

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Abstract Early Jurassic granitoids are widespread in the Lesser Xing’an–Zhangguangcai Ranges, providing excellent targets to understand the late Paleozoic to early Mesozoic tectonic framework and evolution of Northeast China, especially the Jiamusi block and its related structural belts. In this paper, we present new geochronological, geochemical, and isotopic data from the granitoids in the Lesser Xing’an–Zhangguangcai Ranges to constrain the early Mesozoic tectonic evolution of the Mudanjiang Ocean between the Jiamusi and Songnen blocks. Our results show that the granitic intrusions in the L

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Chen, Jingsheng, Dexin Tian, Bin Li, et al. "Permian Granitic Plutons from the Northern Margin of the North China Craton: Implications for the Tectonic Evolution of the Central Asian Orogenic Belt." Minerals 13, no. 12 (2023): 1554. http://dx.doi.org/10.3390/min13121554.

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As the world’s largest accretionary orogen, the Central Asian Orogenic Belt (CAOB) underwent continuous juvenile crustal growth in the Phanerozoic. The northern margin of the North China Craton (NCC) and its adjacent area form the eastern segment of the CAOB, which is a key area for learning about the geological evolution of the Paleo-Asian Ocean (PAO). In the Permian, the west of the northern margin of the NCC was a post-collision extensional environment, while the east was in a subduction stage. As a connecting area, the Permian evolution of the PAO in the middle of the northern margin of th

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