Article
Geology
M. E. Almeida, R. S. C. Nascimento, T. A. Mendes, J. O. S. Santos, M. J. B. Macambira, P. Vasconcelos, S. S. Pinheiro
Summary: The Rio Negro Province in the NW Amazon craton is composed of three domains with different rock types and ages. The province is interpreted as an accretionary orogen formed by a long-lived magmatic arc system, and it has apparent connections with Laurentia and Baltica. The Nd isotope data of the basement rocks provide insights into the mantle sources and crustal contributions.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geology
Cedric Djeutchou, Michiel O. de Kock, Herve Wabo, Camilo E. Gaitan, Ulf Soderlund, Ashley P. Gumsley
Summary: The study presents new data on the 1.87-1.84 Ga Black Hills dike swarm of the Kalahari craton in South Africa, including a new crystallization age and paleomagnetic data. By integrating paleomagnetic and geochronological data sets, poles for three magmatic episodes were calculated and a magnetostratigraphic record was produced.
Article
Geosciences, Multidisciplinary
Veronica G. Trevisan, Steffen G. Hagemann, Robert R. Loucks, Roberto P. Xavier, Joao G. Motta, Luis A. Parra-Avila, Andreas Petersson, Jian-Feng Gao, Anthony I. S. Kemp, Rafael R. Assis
Summary: The study of magmatic activity in the eastern AFMP proposes a new four-stage geological framework, elucidating the characteristics of magmatic activities and tectonic environments at different ages. The results suggest that AFMP may be a remnant block of the eastward Tapaj'os Domain, experiencing different types of magmatic activity during different geological periods.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Chunyu Wang, Shengyao Yu, Deyou Sun, Pei Lv, Zhao Feng, Guan Wang, Jun Gou
Summary: The research conducted detailed geological, geochemical, and isotopic age analyses on rocks from the Oulongbuluke Block, revealing its magmatic activities and metamorphic history at different times.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Fenglin Chen, Xiaozhuang Cui, Shoufa Lin, Jian Wang, Xueming Yang, Guangming Ren, Weihua Pang
Summary: This study presents new dataset of late Mesoproterozoic diabases in the southwestern Yangtze Block, showing tholeiitic composition, negligible crustal contamination, and likely origin from partial melting of a depleted asthenosphere mantle source. The diabases rule out interaction with subduction-related materials and display characteristics typical of within-plate basalts, indicating intense continental rifting in the region during the late Mesoproterozoic. The widespread intraplate magmatism in the Yangtze Block at 1.2-1.1 Ga suggests that it may not have been involved in the Rodinia assembly at the time.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Pei Lv, Shengyao Yu, Yinbiao Peng, Jian Zhang, Sanzhong Li, Yongjiang Liu, Deyou Sun, Xingzhou Jiang, Xiangyu Gao, Wentao Ji, Chuanzhi Li
Summary: By studying the different rocks in the Tarim Craton, we have identified various rock types and formation processes during different time periods, indicating multiple episodes of extension leading to initial breakup in the Tarim Craton.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Ashutosh Pandey
Summary: This study investigates the geodynamic evolution of the proto-northern Indian continental margin and re-evaluates the geochemical data of mafic volcanic and intrusive rocks in the Lesser Himalayan Sequence. The results suggest that these rocks were formed in a back-arc setting during the assembly of the Columbia supercontinent.
PRECAMBRIAN RESEARCH
(2022)
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
Geology
Jiang-bo Hao, Chao Wang, Ji-heng Zhang, Liang Liu, Yong-sheng Gai, Hang Li, Zun-pu Yu, Joseph G. Meert, Xiao-ping Long, Xiao-kui Sun, Shuai Zhang
Summary: Episodic Neoproterozoic magmatic suites in the Altyn Tagh, NW China, are believed to be associated with the breakup of the Rodinia supercontinent. The characteristics of A-type granites derived from a juvenile source, highly fractionated gneissic granites, and a diabase derived from an enriched asthenosphere mantle were observed in this region. The similarity in age of magmatism and metamorphism in the Altyn Tagh-North Qaidam-East Kunlun regions suggests that they collectively represent the basement of the Qaidam block.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Lauro Cezar M. de Lira Santos, Geysson A. Lages, Fabricio A. Caxito, Elton L. Dantas, Peter A. Cawood, Haroldo M. Lima, Felipe J. da Cruz Lima
Summary: The Alto Moxoto Terrane in the Borborema Province of Brazil has a significant exposure of Paleoproterozoic crust. New studies conducted on mafic-ultramafic and granitic-gneissic rocks within the terrane provide insights into its orogenic history and tectonic setting. The results suggest that the studied units might represent missing pieces of a Paleoproterozoic accretionary orogen associated with the assembly of the Nuna/Columbia supercontinent.
GEOSCIENCE FRONTIERS
(2022)
Article
Geochemistry & Geophysics
Sheree E. Armistead, Alan S. Collins, Renata S. Schmitt, Raisa L. Costa, Bert De Waele, Theodore Razakamanana, Justin L. Payne, John D. Foden
Summary: The study compared Paleoproterozoic sedimentary sequences in Madagascar, Africa, and India using detrital zircon U-Pb and Hf data, revealing similarities in age and isotopic characteristics. A new concept of the Greater Itremo Basin was proposed to explain the extensive sedimentary coverage in late Paleoproterozoic Madagascar. The research also suggested a new Paleoproterozoic plate tectonic configuration where central Madagascar is connected to the Tanzania Craton and Southern Granulite Terrane.
Article
Geosciences, Multidisciplinary
Hassan Abdelslam Mustafa, Fanxi Liao, Nengsong Chen, Zhendong You, Meshaal Abdelgadir Salih, Lu Wang, Lu Zhang
Summary: The study reveals that the garnet amphibolites from the Quanji Massif in northwestern China likely formed in a post-collisional geological setting approximately 2.33 billion years ago. These rocks contain fluids and melts derived from a metasomatized sub-continental lithospheric mantle during the Early Paleoproterozoic. This research is significant for understanding the mantle source nature, tectonic settings, and tectonic evolution.
JOURNAL OF EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Anil Tiwari, Ajay Paul, Rakesh Singh, Rajeev Upadhyay
Summary: The Garhwal-Kumaun region in the NW Himalaya is located in the Central Seismic Gap, where a great earthquake is anticipated due to accumulated strain energy. Continuous monitoring of seismic activity in the region has revealed significant stress accumulation, particularly in the proximity of the Rudraprayag-Chamoli region. The study area has been divided into seismogenic asperities, with potential future great earthquake zones identified at certain depths.
Article
Geosciences, Multidisciplinary
Cheng-Xue Yang, M. Santosh, Shan-Shan Li, E. Shaji, Sung Won Kim
Summary: The basement rocks of the Trivandrum block in southern India consist mainly of charnockites and enderbites, indicating subduction-related magmatism during the Paleoproterozoic era and the formation of new crust from juvenile magmas.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Manoj K. Pandit, Hitesh Kumar, Wei Wang
Summary: The study of basement granite gneisses in the north-central Aravalli Craton in NW India revealed that they are mainly granite and granodiorite, with a common source and implying a larger areal extent of Paleoproterozoic anorogenic magmatism.
GEOSCIENCE FRONTIERS
(2021)
Article
Geosciences, Multidisciplinary
Nongmaithem Lakhan, Athokpam Krishnakanta Singh, Birendra Pratap Singh, Koushik Sen, Mutum Rajanikanta Singh, Shoraisam Khogenkumar, Saurabh Singhal, Govind Oinam
GEOLOGICAL JOURNAL
(2020)
Article
Geosciences, Multidisciplinary
Paramjeet Singh, Saurabh Singhal, Apurba Nayan Das
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Praveen Chandra Singh, Himanshu K. Sachan, Aditya Kharya, Franco Rolfo, Chiara Groppo, Saurabh Singhal, Sameer K. Tiwari, Shashi Ranjan Rai
JOURNAL OF ASIAN EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
A. K. Jain, P. K. Mukherjee, Saurabh Singhal
Article
Geochemistry & Geophysics
Shailendra Pundir, Vikas Adlakha, Santosh Kumar, Saurabh Singhal, Koushik Sen
MINERALOGY AND PETROLOGY
(2020)
Article
Geosciences, Multidisciplinary
Shubham Choudhary, Koushik Sen, Santosh Kumar, Shruti Rana, Swakangkha Ghosh
Summary: Carbonatite melts derived from the mantle are enriched in CO2 and H2O fluids; interaction with peridotite can form Fe- and Mg-rich carbonates; olivine in Sung Valley carbonatite is xenocrystic and contains inclusions of Fe-rich magnesite.
GEOLOGICAL MAGAZINE
(2021)
Article
Geochemistry & Geophysics
Anil Kumar, Pradeep Srivastava, Koushik Sen, Kristin Morell, Devajit Hazarika
Article
Geosciences, Multidisciplinary
Kalachand Sain, Amit Kumar, Manish Mehta, Akshaya Verma, Sameer K. Tiwari, Purushottam K. Garg, Vinit Kumar, Santosh K. Rai, Pradeep Srivastava, Koushik Sen
Summary: A ground-based and heliborne survey was immediately conducted after the disaster in Chamoli district of Uttarakhand on February 7, 2021. The likely cause of this catastrophe was identified as the detachment of a sizeable rock mass and overlying hanging glacier in the Raunthi catchment area, which blocked the Rishiganga River downstream.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2021)
Article
Geosciences, Multidisciplinary
Aranya Sen, Koushik Sen, Amitava Chatterjee, Shubham Choudhary, Alosree Dey
Summary: The study of the Bhagirathi Valley in the Western Himalayas reveals the geologic history and magmatic activities of two different periods in the Himalaya. Zircon age dating shows that the granitic bodies and the Tethyan Himalayan Sequence have similar ages and origins.
GEOLOGICAL MAGAZINE
(2022)
Article
Geology
Aditya Kharya, Himanshu K. Sachan, Christopher J. Spencer, Koushik Sen, Divya Prakash, Shashi Ranjan Rai, Vikash Kumar
Summary: This study focuses on the fluid activity in the Zildat and Shergol ophiolitic melanges of the Indus Suture Zone, presenting fluid-inclusion and isotope geochemistry of quartz-calcite veins to decipher their origin and evolution. The isotopic analysis of calcite veins indicates a mixing model of marine and primitive-mantle fields, with a mid-ocean ridge basalt fluid source for the Zildat veins and enriched-mantle and depleted-MORB-mantle rocks as potential sources for the Shergol veins. The vein-forming fluids were likely introduced into fractures in the host rocks as a result of deformation, with emplacement depths estimated at approximately 2.5 km and temperatures between 200-400 degrees C.
JOURNAL OF GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Kunal Mukherjee, Vikas Adlakha, Sayandeep Banerjee, Koushik Sen
Summary: This study provides the first low-temperature thermochronological record from the Lohit Valley in the Eastern Himalaya. The results suggest rapid exhumation rates in the region as a result of tectonic activity.
GEOLOGICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Aranya Sen, Alosree Dey, Koushik Sen
Summary: This study investigates the geochemistry, geochronology, and metamorphic modeling of garnet-amphibolite in the Western Garhwal Himalaya region of India. The results suggest that the garnet-amphibolite represents the pre-Himalayan Indian lower crust and underwent high-pressure metamorphism during the Himalayan orogeny under high-pressure and medium-temperature conditions.
GEOLOGICAL JOURNAL
(2023)
Article
Geology
Manju Negi, Santosh K. Rai, Sumit K. Ghosh, Uday Bhan, Saurabh Singhal