Article
Geosciences, Multidisciplinary
Min Gao, Zhen-Jie Zhang, Qiu-Ming Cheng, Djordje Grujic
Summary: The Huai'an Complex in the North China Craton consists of TTG gneisses and granite intrusive bodies. Zircon U-Pb ages reveal three episodes of magmatism from 2.6-2.3 Ga, 2.0-1.7 Ga, and similar ages around 2.3-2.0 Ga, indicating different magma sources. The complex underwent crustal growth and reworking stages from 3.1-2.5 Ga to 1.95-1.7 Ga, with tectonic processes of compression-extension-compression during 2.6-1.7 Ga.
Article
Geochemistry & Geophysics
Jing-Yi Wang, Toshiaki Tsunogae, M. Santosh
Summary: This study investigates the magmatic suites in the Abukuma Mountains in NE Japan, which provide insights into the geodynamic evolution of the region. The rocks in the Abukuma Mountains were formed around 110 to 115 million years ago, while the rocks in the Kitakami region were formed around 108 million years ago. The geochemical features of the rocks suggest different subduction and melting processes in these two regions.
Article
Geosciences, Multidisciplinary
Benjamin Wasilewski, Jonathan O'Neil, Hanika Rizo, Jean-Louis Paquette, Abdel-Mouhcine Gannoun
Summary: The Saglek-Hebron Complex in Northern Labrador, Canada, contains some of the oldest crustal rocks on Earth, with over one billion years of early magmatic history recorded. New analyses on zircons suggest six distinct magmatic events formed the felsic crust, with ages ranging from approximately 3857 Ma to 2750 Ma. The complex and protracted crustal history of the SHC is marked by the reworking of mafic and felsic crust over one billion years.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Pin Gao, M. Santosh, Cheng-Xue Yang, Yunpeng Dong, M. Nakagawa
Summary: The study revealed the mineral composition and age characteristics of volcanic rocks in the central segment of the Setouchi volcanic belt in southwest Japan, showing two groups of different zircon grains representing crustal and juvenile sources respectively. Analysis of geochemical and geochronological data showed that the volcanic rocks in this area have evolved through processes of crustal contamination and fractionation, differing from HMA.
Article
Geosciences, Multidisciplinary
Hamed Gamaleldien, Zheng-Xiang Li, Mohamed Abu Anbar, J. Brendan Murphy, Noreen J. Evans, Xia-Ping Xia
Summary: This study investigates the Neoproterozoic magmatism in the Eastern Desert of Egypt and finds that the granitoids in this region were derived from melting of a juvenile source without the input of old continental material.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Zhongwu Lan, S. K. Pandey, Shujing Zhang, Mukund Sharma, Yuya Gao, Shitou Wu
Summary: Integrated detrital zircon U-Pb and Lu-Hf isotope analyses in sedimentary rocks from central India reveal different age groupings of zircon grains, which match well with exposed magmatic and metamorphic rock components in the Northern India Block, providing crucial insights into crustal growth and plate tectonics evolution.
PRECAMBRIAN RESEARCH
(2021)
Article
Geology
Arlin B. Fonseca-Martinez, Alexander Iriondo, Scott E. K. Bennett, Fred W. McDowell, Carlos Ortega-Obregon
Summary: This study presents U-Pb zircon ages and Lu-Hf zircon isotope data for Cretaceous-Paleocene plutonic rocks in northwestern Mexico. The results show slower migration rates of the continental arc and the importance of Hf isotope characteristics in constraining the pre-Cretaceous basement configuration.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
O. Tapani Ramo, Tom Andersen, Martin J. Whitehouse
Summary: The article presents a study on the Larvik plutonic complex in the Oslo Rift, analyzing the isotopes in the intrusive rocks and conducting magma modeling. The results reveal the magma activity and evolution of the complex, as well as its significance in the development of the rift.
JOURNAL OF PETROLOGY
(2022)
Article
Geology
Pin Gao, M. Santosh, Toshiaki Tsunogae, Cheng-Xue Yang, M. Nakagawa, Sung Won Kim, Yunpeng Dong, Hai-Dong Liu
Summary: In this study, a suite of felsic volcanic rocks and lamprophyres from central Shikoku Island in SW Japan arc were investigated. The felsic volcanic rocks show characteristics of arc volcanic affinity and can be correlated to Miocene magmatism. The lamprophyres, on the other hand, display OIB-like geochemical features and were derived from depleted mantle sources contaminated by crustal materials.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Jeffrey S. Hannon, Craig Dietsch, Warren D. Huff, Davidson Garway
Summary: The Cretaceous strata in Wyoming contain large bentonite deposits formed from volcanic ash, primarily from Idaho magmatism. By analyzing zircon grains, researchers were able to track the evolution of Idaho magmatism over time, identifying distinct periods of plutonic emplacement during the Mid- to Late Cretaceous. The study highlights the importance of using zircons to understand regional-scale geological processes and the spatial migration of magmatism.
Article
Geochemistry & Geophysics
Sean P. Gaynor, Tyson M. Smith, Urs Schaltegger
Summary: Large volume rhyolitic ignimbrite volcanism significantly contributes to the evolution of the crust through the introduction of high-silica material and differentiation within the crust. Accurate models for the genetic evolution of these events rely on geochronology, which determines the rates of magmatic processes. This study presents new zircon geochronology and Hf isotope geochemistry for ignimbrites from the Mogollon-Datil volcanic field, providing insights into the protracted evolution of the lower crust.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Augustin Y. Koffi, Nicolas Thebaud, Alain N. Kouamelan, Lenka Baratoux, Olivier Bruguier, Olivier Vanderhaeghe, Pavel Pitra, Anthony I. S. Kemp, Noreen J. Evans
Summary: The crustal evolution in the south West African Craton was influenced by juvenile material input around 2.1 Ga, and the impact of pre-existing Archean crustal domains on the Paleoproterozoic continental mass remains unclear. The Sassandra-Cavally (SASCA) domain, located in Cote d'Ivoire, provides valuable insights into the transition between the Archean and Paleoproterozoic terranes. Zircon grains extracted from migmatitic gneisses, metasedimentary rocks, and a granitic intrusion underwent U-Pb and Lu-Hf isotopic analyses using LA-(MC-)ICP-MS. The results suggest that the migmatitic gneisses were derived from the mantle during the Paleoarchean and underwent substantial reworking in the Mesoarchean, while the metasedimentary units contain detrital zircon grains with Paleoproterozoic ages, indicating a juvenile source. The intrusion exhibits a hybrid isotopic signature, suggesting a complex geological history.
PRECAMBRIAN RESEARCH
(2022)
Article
Geochemistry & Geophysics
Anirban Mitra, Sukanta Dey, Pranab Das, Keqing Zong, Yongsheng Liu
Summary: Through the study of whole-rock geochemistry, detrital zircon U-Pb-Hf isotopes, and trace element data from Mesoarchean clastic rocks in two greenstone belts of the western Dharwar Craton, it is found that these rocks were derived from a strongly weathered stable continental provenance dominated by low-HREE TTGs and K-rich granites of shallow crustal origin. The detrital zircon U-Pb and Lu-Hf data indicate two major crust formation events, with the antiquity of the western Dharwar Craton traced back to at least 3.8 Ga. The detrital record suggests episodic crustal growth and reworking in the western Dharwar Craton during the Paleoarchean to early Mesoarchean period, possibly related to intraplate processes.
Article
Geosciences, Multidisciplinary
R. K. Bikramaditya, Sun-Lin Chung, Athokpam Krishnakanta Singh, Hao-Yang Lee, Leiphrakpam Lemba
Summary: The Salari granite in the western Arunachal Himalaya was formed by partial melting of older metavolcanic/metatonalitic rocks in a continental arc setting of the supercontinent Columbia during the Palaeoproterozoic. The magmatic emplacement of the Salari granite took place between 1,791 and 1,768 Ma, with characteristics of metaluminous I-type granite.
GEOLOGICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Semih Gursu, Serhat Koksal, Andreas Moeller, George D. Kamenov, M. Cemal Goncuoglu, Kevin Hefferan, Paul A. Mueller, Huseyin Kozlu
Summary: The detrital U-Pb age peaks and Lu-Hf systematics of peri-Gondwanan units in southern Turkey suggest their derivation from Neoproterozoic igneous suites in the Sinai Peninsula, Israel, and the Eastern Desert. These sediments were likely derived from sedimentary recycling processes in a continental back-arc tectonic setting. The provenance of the sediments correlates with nearby regions such as the Nubian Shield and Saharan Metacraton.
Article
Geosciences, Multidisciplinary
Leilei Lu, Suhua Jiang, Sanzhong Li, Pengcheng Wang, Yan Jiang, Gang Wang, Wen Zhang, Yanhui Suo, M. Santosh
Summary: This study investigates the tectonic evolution history of the ocean-continent connection zone in the eastern South China Block (SCB) using gravity and magnetic methods. The study reveals the presence of undulating Moho discontinuity and deep supra-crustal faults beneath the South China Block, which are associated with the subduction of the (Paleo-) Pacific plates. Additionally, a geologically-indistinct Jurassic magmatic arc is identified along the SCB continental margin. As time progressed, this magmatic arc transformed, indicating an eastward migration or jumping of the Yanshanian subduction along the continental margin of the SCB.
Editorial Material
Geosciences, Multidisciplinary
Sanzhong Li, M. Santosh, Yongjiang Liu, Shengyao Yu
Article
Geology
Hesen Zhao, Qingfei Wang, David I. Groves, M. Santosh, Jili Zhang, Tao Fan
Summary: The poorly documented Daduhe gold belt in southwest China is an important metallogenic belt characterized by typical orogenic gold systems. This study reveals the regional metallogenic patterns of the belt, establishes a consistent genetic model, and demonstrates a common source of ore fluids and metals. The findings suggest a high prospectivity and a higher future gold endowment for the Daduhe belt.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Jia-Ying Feng, Li Tang, Bo-Chang Yang, M. Santosh, Shou-Ting Zhang, Bo Xu, Sung Won Kim, Yuan-Ming Sheng
Summary: This study provides insights into the age and genesis of the Huangshui'an deposit through field investigation and experimental analysis. Results reveal heterogeneous material sources for the deposit and suggest that Late Triassic carbonatite magmatism and mineralization were controlled by the enriched mantle and thickened lower crust, facilitated by a post-collisional extension setting.
ORE GEOLOGY REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
ZhongJie Shen, M. Santosh, Alireza Arabameri
Summary: Land subsidence is a challenging geo-hazard caused by overexploitation of groundwater and underground cavity collapse. Predicting and mitigating this hazard is difficult due to limitations in monitoring and knowledge. Remote sensing and GPS can help locate and map subsidence, but proper susceptibility maps are generally lacking. Machine learning techniques show promise in preparing these maps, and their application can help prevent natural and human catastrophes and reduce economic losses.
GEOLOGICAL JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Jiahao Chen, Qingfei Wang, M. Santosh, Long Qiao, Tingyi Wang, Yanning Wang, Qizuan Zhang
Summary: Detrital zircon analysis and thermochronology were conducted to study the plate boundary dynamics and basin sedimentation in the southwestern South China Block. Results indicate different provenances and tectonic events during the Early and Middle Triassic, with the turbidite system being primarily controlled by Palaeo-Pacific subduction in the Early Triassic and experiencing the impact of both Palaeo-Pacific subduction and Indochina Block collision in the Middle Triassic.
GEOLOGICAL JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Raja Sen, Dibyashakti Panda, Bhaskar Kundu, M. Santosh
Summary: Using data from geodetic measurements and tomography, we propose that the Narmada-Son palaeo-rift is a current diffuse plate boundary that divides the Indian composite plate into two component plates. The collision of the South-Indian plate with the Narmada-Son boundary acts as a pivot point, causing torque and mechanical rotation. Our model aligns with the estimated relative Euler pole positions and explains the Indian composite plate hypothesis, topographic diversity along the rift, and deformation styles across the diffuse plate boundary.
GEOLOGICAL JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Hengxu Li, Zhaochong Zhang, Bingxiang Liu, Yilun Jin, M. Santosh
Summary: Multiple types of deposits can form from a single magmatic-hydrothermal system. Identification of the link among different styles of deposits is crucial for understanding the evolution of magmatic-hydrothermal systems and exploring for ore deposits.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Zheng Ji, Wen-Chun Ge, M. Santosh, Chuan-Biao Wan, Yan-Long Zhang, Jun-Hui Bi, Hao Yang, Yu Dong, Yan Jing
Summary: The closure of the Paleo-Asian Ocean along the Solonker Suture in the Central Asian Orogenic Belt is investigated. The rocks in the area show characteristics of subduction-related processes and partial melting of the mantle. The tectonic evolution of the region involves double-sided subduction, soft collision, and post-collisional extension.
GEOSCIENCE FRONTIERS
(2023)
Article
Geochemistry & Geophysics
Ruixuan Zhang, Zhiguo Cheng, Zhaochong Zhang, Zhen Chen, Richard Ernst, M. Santosh
Summary: This study applies machine learning methods to global datasets of basalts to investigate the role of fluids in the formation of large igneous provinces (LIPs). The results show that the basalts of Tarim LIP in northwestern China exhibit a spatial decrease in their island arc affinity from northeast to southwest, suggesting the influence of fluids released from earlier southward oceanic subduction. Temporally, the decline in fluid activity from 290 Ma basalts to 270 Ma mafic dykes indicates a decrease in fusible components in the mantle source and the generation of a strengthened lithosphere. This study provides new insights into the crucial role of fluids in LIP generation, particularly those associated with ancient subducted slabs.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
Dingying Yang, Xi Jiang, Alireza Arabameri, M. Santosh, Johnbosco C. Egbueri
Summary: This study investigates the influence of sample size on the precision of landslide susceptibility modelling using a machine learning methodology. The researchers find that increasing the sample size improves the accuracy of the models and highlight the reliability of a multi-scenario strategy. The findings have important implications for land-use planning and catastrophe risk management.
GEOLOGICAL JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Yang Wang, Yongfeng Gao, Shengchuan Xu, M. Santosh, Tianjia Jiao
Summary: The Chagan Obo shear zone in central Inner Mongolia is important for understanding the convergence between the North China-Mongolia and Siberia continents. Three deformation zones were identified within the shear zone, and their structural and kinematic characteristics were investigated. Shear indicators such as foliations, mica fish, sigma-type structures, and asymmetric folds suggest thrusting through compression. Muscovite ages indicate that the convergence lasted from Late Jurassic to Early Cretaceous. Shoshonitic volcanism and rift basins in the region indicate orogenic collapse in the eastern Central Asian Orogenic Belt.
GEOLOGICAL JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Weidong Ren, Fan Yang, Zesheng Qian, Chao Liu, Xinyuan Li, M. Santosh, Fei Xue
Summary: The Shibaogou and Laojunshan plutons in the Luanchuan region, China, are high heat production granites linked to I-, A-, and partly S- type granitoids, aiding in the formation of associated polymetallic deposits. The RHP values of granitoids in the region vary from 1.7 to 14.44, with higher values correlated to higher magma differentiation. These high RHP value intrusions show genetic links with high economic deposits. The RHP contour mapping also identifies potential zones for Mo-W exploration.
GEOLOGICAL JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Han-Hui Wang, Li Tang, M. Santosh, Li-Hui Jia, Tao Zeng, Yuan-Ming Sheng
Summary: In this study, garnet amphibolites from the Wanzi Group in the Fuping Complex along the Trans-North China Orogen (TNCO) were investigated. Petrological features and phase equilibrium modelling revealed a sequential increase in pressure and temperature during the metamorphic process. Zircon U-Pb dating showed that the garnet amphibolites experienced a long-lived post-peak decompression and cooling process during 1.90-1.76 Ga, leading to the final assembly of the North China Craton.
GEOLOGICAL JOURNAL
(2023)
Article
Geology
Xianghui Fei, Zhaochong Zhang, Zhiguo Cheng, M. Santosh, Zhenzhen Gao, Bakhtiar Nurtaev
Summary: Tungsten (W) deposits in the Southern Tianshan Orogenic Belt, Uzbekistan are related to high-Si granites which exsolve magmatic-hydrothermal fluids. The formation mechanism of these granites is still controversial. This study provides new geochronological and geochemical data, showing that the muscovite porphyritic granite is genetically related to W mineralization. The study suggests that extreme fractional crystallization plays a significant role in W enrichment in the granitic melt.