Article
Geochemistry & Geophysics
Borong Liu, Jingen Dai, Hailong Zhang, Jie Shen, Kai Yang
Summary: This study presents geochemical data, zircon U-Pb ages, and Hf isotopic compositions of adakitic and potassic rocks in the Himalaya and Tibetan Plateau. The results suggest that these rocks were derived from partial melting of the lower continental crust, triggered and hybridized by enriched mantle-derived shoshonitic melts. The spatiotemporal distribution of these rocks can potentially be explained by lateral detachment, longitudinal tearing, slab rollback, and hinge advance processes.
Article
Geochemistry & Geophysics
Ahmad Jamshidzaei, Ghodrat Torabi, Tomoaki Morishita, Akihiro Tamura
Summary: The Eocene felsic stock and dike swarm with intermediate composition from Central Iran likely formed by subduction of oceanic crusts, showing both high silica adakites (HSA) and low silica adakites (LSA) characteristics. These rocks have calc-alkaline and high-K calc-alkaline to shoshonitic properties, suggesting formation in a volcanic arc setting.
JOURNAL OF GEODYNAMICS
(2021)
Editorial Material
Geosciences, Multidisciplinary
Hua-Wen Cao, Li Tang, Cheng-Xue Yang, M. Santosh
Summary: The Tethys domain is one of the largest continent-continent collisional orogenic belts on Earth, divided into three major phases. It is also a major metallogenic domain with world-class ore belts and has been studied for over 100 years, with recent advances and controversial issues. The Geological Journal's thematic section contains 10 articles that focus on the formation of rocks and ore deposits, providing important references for future studies.
GEOLOGICAL JOURNAL
(2023)
Article
Geology
Taku Yutani, Naoto Hirano, Hirotaka Tanaka, Hirochika Sumino, Shiki Machida, Shun Sekimoto, Shigekazu Yoneda, Yasuhiro Kato
Summary: This study investigates the occurrence, geochemistry, and age of fine-grained and basaltic rocks in the present-day forearc area of the Nemuro Belt in northeastern Japan. The results suggest that these rocks were formed in an intraoceanic arc setting during the Late Cretaceous to early Paleogene. Previous paleomagnetic studies also support this interpretation. Rating: 7/10.
CRETACEOUS RESEARCH
(2023)
Article
Geography, Physical
Wenxiao Peng, Tianshui Yang, Yuruo Shi, Weiwei Bian, Yiming Ma, Suo Wang, Xianwei Jiao, Jiahui Ma, Yuelan Kang, Shihong Zhang, Huaichun Wu, Haiyan Li
Summary: The U-Pb geochronological and whole rock geochemical studies on volcanic rocks in the eastern Tethyan Himalaya reveal that these rocks erupted during the Early Cretaceous and share similarities with alkali basalts from the Kerguelen mantle plume. These findings support the idea that the Kerguelen mantle plume led to the breakup of eastern Gondwana.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geochemistry & Geophysics
Chen-Yang Sun, Peter A. Cawood, Wen-Liang Xu, Xiao-Ming Zhang, Jie Tang, Yu Li, Zhong-Xing Sun, Ting Xu
Summary: The composition of accessory minerals like apatite can shed light on the nature and origin of the parent magma. Apatite's rare earth element patterns are influenced by the host rock's trend, with enrichment in MREE, but can be decoupled due to early crystallization of other minerals. Sr variation in apatite is closely correlated with plagioclase crystallization, showing constant Sr partition coefficients. Apatite can provide valuable insights into granitoid petrogenesis and potential source tracking in detrital grains.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geosciences, Multidisciplinary
Yuhang Song, Chaoming Xie, Zhongwei Gao, Yunpeng Yu, Bin Wang, Menglong Duan, Yujie Hao
Summary: This study provides detailed research on the Early Jurassic granitic rocks in the Tangjia-Sumdo area of the Lhasa block, revealing the evolutionary history and tectonic processes of the Paleo-Tethyan Ocean basin in this region. The results show that the magmatic activity in the area can be divided into two stages, with the first stage associated with the break-off of the Paleo-Tethyan oceanic crust and the second stage associated with northward subduction of the Neo-Tethyan Ocean, representing a tectonic transition from Paleo- to Neo-Tethys Ocean in the Early Jurassic in the Lhasa Block.
Article
Energy & Fuels
Assunta Donato, Franco Tassi, Giovannella Pecoraino, Adele Manzella, Orlando Vaselli, Esterina Gagliano Candela, Alessandro Santilano, Leonardo La Pica, Claudio Scaletta, Francesco Capecchiacci
Summary: Sicily hosts various natural manifestations, including thermal waters, gas discharges, and mud volcanoes. The chemical and isotopic compositions of water and gas in the region show significant variability, driven by diverse geochemical processes. Analyzing gas chemistry and water isotopes can provide insights into the geothermal structure and fluid circulation models in the area.
Article
Geochemistry & Geophysics
Peng Wang, Guochun Zhao, Qian Liu, Yigui Han, Yunying Zhang, Jinlong Yao, Shan Yu
Summary: The study of the Kudi back-arc ophiolite reveals a progressive evolution in back-arc basins, with the formation of enriched pillow lavas due to the addition of slab-derived sediments. The geochemical characteristics of basalts and the pressure conditions support the back-arc setting, suggesting a complex evolution process leading to the enrichment of light rare earth elements in late-stage lavas.
Article
Environmental Sciences
Farah Nefzaoui, Mohamed Fethi Ben Hamouda, Paula Maria Carreira, Jose Manuel Marques, Hans G. M. Eggenkamp
Summary: The key processes responsible for the rise in groundwater salinization in the Mio-Pliocene aquifer system of Sousse (Tunisia, eastern coastline) were identified through a multidisciplinary approach based on the use of geochemical, stable and radioactive isotope methods. The mineralization of groundwaters in the study region is due to water-rock interaction and saltwater intrusion, which results in the deterioration of groundwater quality dominantly determined by Cl and Na. The isotopic and geochemical signatures of the studied groundwaters are explained by the occurrence of saline basins, type of rocks found below the ground surface, and cation exchange between clays and groundwaters.
Article
Geology
Yajie Gao, Hugh St. C. O'Neill, John A. Mavrogenes
Summary: The garnet signature is an important indicator for determining the origin of adakites, but not all rocks labeled as adakites exhibit this feature. Many examples with extreme garnet signatures require hybrid sources, including subducted sediment and igneous oceanic crust, but extensive deep-crustal differentiation may obscure the characteristics of these sources.
Article
Geology
Qiaoqiao Zhu, Nigel J. Cook, Guiqing Xie, Cristiana L. Ciobanu, Sarah E. Gilbert, Benjamin Wade, Jing Xu
Summary: Breccia-hosted Sr-(Pb-Zn) mineralization from the Shizilishan deposit in eastern China is formed by the interaction between fluids with low to moderate salinity and a quartz diorite porphyry stock. The research highlights that extensive water-rock interaction can lead to the formation of large celestine deposits when fluid flow is continuous and there are superimposed episodes of high Sr/Ba ratios and moderate dissolved sulfate.
ORE GEOLOGY REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Alastair Harry Forbes Robertson, Osman Parlak, Timur Ustaomer, Kemal Tasli, Paulian Dumitrica
Summary: The eastern Taurus region showcases a variety of geological processes including continental rifting, passive margin development, melange genesis, and ophiolite emplacement. Distinct rock formations and tectonic events during different geological periods interacted to create a complex geological structure in the area.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geology
Serguei G. Soloviev, Sergey G. Kryazhev, Vasily N. Shapovalenko, Gregory S. Collins, Svetlana S. Dvurechenskaya, Daria S. Bukhanova, Anton Ezhov, Konstantin Voskresensky
Summary: The Kirganik prospect is a silica-undersaturated, shoshonite-related, alkalic, porphyry Cu-Au system developed within the Late Cretaceous island arc of Central Kamchatka. It exhibits a subduction-related, island arc rock affinity.
ORE GEOLOGY REVIEWS
(2021)
Article
Geochemistry & Geophysics
Jing-Jing Fan, Qiang Wang, Gang-Jian Wei, Jie Li, Lin Ma, Xiu-Zheng Zhang, Zi-Qi Jiang, Jin-Long Ma, Jin-Sheng Zhou, Qi-Wei Li, Zi-Long Wang, Xiao Liu, Tong-Yu Huang, Miao-Yan Zhang
Summary: A systematic study of Cenozoic granites from the Yardoi area in the eastern Tethyan Himalaya, China reveals two groups: mid-Eocene porphyritic two-mica granites with low SiO2 contents and adakitic geochemical signatures, and mid-Eocene to Miocene equigranular granites with high SiO2 contents. The two groups have different sources, with the low-SiO2 granites derived from partial melting of metamafic rocks at thickened lower crustal conditions, and the high-SiO2 granites generated by partial melting of mid-crust metasedimentary rocks.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Editorial Material
Geology
Qingfei Wang, Jun Deng, Liqiang Yang, M. Santosh
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
Geochemistry & Geophysics
Tsai-Wei Chen, Mei-Fei Chu, Wen-Shan Chen, Sun-Lin Chung, Hao-Yang Lee, Yoshiyuki Iizuka
Summary: This study investigates the evolution of the Taiwan orogen by analyzing arc volcanic and sedimentary rocks in the Taiyuan retro-foredeep basin. The results show that volcanism in the northern North Luzon Arc (NLA) peaked at 9-7 Ma and ceased at 5.3-4.3 Ma, while eruptions associated with the Lutao volcano in the southern NLA occurred at 1.74, 1.58, and <1.2 Ma. The sediments in the Taiyuan Basin mainly originated from the Yuli Belt, and the deposition rate suddenly increased at ~2 Ma, indicating asymmetric and rapid uplift of the Taiwan orogen.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geochemistry & Geophysics
Xiao Ran Zhang, Sun-Lin Chung, Azman A. Ghani, Rezal Rahmat, Yi-Ju Hsin, Hao-Yang Lee, Ping-Ping Liu, Jinyu Xi
Summary: By analyzing Borneo and its surrounding areas, researchers have found that the crust of Borneo shares similarities with northern Australia, suggesting a common origin and the splitting of Borneo from northern Australia. Recent investigations have challenged the current understanding of Gondwana dispersion and Asian accretion, shedding new light on Asian climate change and biogeographic diversity.
Article
Geochemistry & Geophysics
A. Krishnakanta Singh, Naveen Kumar, Sun-Lin Chung, Hao-Yang Lee, M. Santosh, Radhika Sharma, Naresh Kumar, R. K. Bikramaditya, Govind Oinam, Nongmaithem Lakhan
Summary: This study presents new zircon U-Pb ages for felsic volcano-plutonic rocks from the Tusham Ring Complex (TRC), which suggests that the intrusive and extrusive rocks are coeval. Geochemical analysis indicates that partial melting, fractional crystallization, and crustal contamination played a significant role in the magmatic evolution of these rocks. These findings support the model of anorogenic magmatism linked with the breakup of the Neoproterozoic Rodinia supercontinent.
Article
Geosciences, Multidisciplinary
Yun-Chieh Lo, Chih-Tung Chen, Ching-Hua Lo, Sun-Lin Chung, Meng-Wan Yeh
Summary: The Taiwan mountain belt is formed from the collision between the South China Sea and the Luzon forearc, playing a crucial role in the growth of continents. The ongoing incipient collision at the southern tip of Taiwan Island provides a unique opportunity to observe the transition from oceanic to continental subduction. The Shihmen Conglomerate, composed of coarse mafic pebbles, represents a significant change in sediment provenance and tectonic events.
FRONTIERS IN EARTH SCIENCE
(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
Geosciences, Multidisciplinary
Bin Zhang, Jiaqi Liu, Wen Chen, Zhiliang Zhang, Li Yang, Lei Zhang, Zeyang Zhu, Chunqing Sun, Zhihao Sun
Summary: The eastern Tibetan Plateau is a region with unique topography and active tectonics, making it crucial for studying geodynamics and lithosphere-atmosphere interaction. By integrating new and reported thermochronological data, as well as paleo-crustal thickness reconstruction, this study sheds light on the tectonic deformation, climate-tectonic coupling, and geodynamics of the area.
Article
Geosciences, Multidisciplinary
Zhenhua Tian, Shangwen Zhou, Songtao Wu, Sai Xu, Junping Zhou, Jianchao Cai
Summary: This paper presents a modified method for calculating the lost gas content of shale by analyzing the coring and on-site desorption processes. The method accurately depicts the loss characteristics of free and adsorbed gas and identifies parameters that influence the calculation of in-situ shale gas content. The results demonstrate that the method shows satisfactory applicability in gas loss curve prediction and in-situ gas content estimation.
Article
Geosciences, Multidisciplinary
Pengcheng Li, Jaffar Abbas, Daniel Balsalobre-Lorente, Qingren Wang, Qianxiao Zhang, Syed Ale Raza Shah
Summary: This study explores the factors contributing to sustainability in Pakistan from 1974 to 2018 and finds that emissions from industrial and agriculture sectors have significantly decreased, while the financial sector has not effectively reduced environmental pressure. Therefore, Pakistan needs to adjust its economic policies and ensure the green allocation of financial resources.
Article
Geosciences, Multidisciplinary
Shi Zhou, Ting Zhou, Duo Guan, Yong Yao, Huimin Sun, Ahmed Ali Mosa, Yajie Zuo, Xianqiang Yin
Summary: Graphitic carbon nitride (g-C3N4) has been widely used due to its excellent optical properties and physicochemical stability. The risk of g-C3N4 transport in the environment has been overlooked, but this study investigated its transport behavior in various media. The results showed that flow rate and ionic strength influenced the transport, and the presence of lead (Pb) affected the outflow of g-C3N4. The unique structure of g-C3N4 particles allowed them to deposit in certain media and act as carriers for Pb release.
Article
Geosciences, Multidisciplinary
Xiaolong Qiao, Muntasir Murshed, Mohammad Mahtab Alam, Narasingha Das, Kurshid Khudoykulov, Salman Tariq
Summary: This study examines how macroeconomic factors influence India's carbon emission intensity levels and confirms the impact of factors such as foreign remittance receipts, energy consumption, urbanization, and technological progress. The findings provide policy recommendations for India's carbon emission reduction targets.
Article
Geosciences, Multidisciplinary
Wei Liu, Bo Wan
Summary: Magmatic-hydrothermal systems play a crucial role in transporting materials and potentially affecting Earth's long-term environment. This study investigates the duration of prograde metamorphism induced by fluid infiltration and the amount of carbon released by skarn ore deposits. The findings reveal that skarn ore deposits can efficiently decarbonize CO2 at a high rate, surpassing volcanism in different tectonic settings. The CO2 flux of skarn deposits increases over time and reaches a maximum value at the J/K boundary, providing an important previously unquantified source of outgassing in the subduction zone.
Article
Geosciences, Multidisciplinary
Haikuan Nie, Pei Li, Qing Chen, Zhijun Jin, Quanyou Liu, Wei Dang, Qian Chen, Jianghui Ding, Changbo Zhai
Summary: This study investigates the shale quality and shale gas potential in the upper Ordovician to lower Silurian formations in the Sichuan Basin of southern China. The distribution and characteristics of organic-rich shale are analyzed, aiding in the assessment of shale gas potential and identification of sweet spots.
Article
Geosciences, Multidisciplinary
Najia Saqib, Shujaat Abbas, Ilhan Ozturk, Muntasir Murshed, Malgorzata Tarczynska-Luniewska, Mohammad Mahtab Alam, Waldemar Tarczynski
Summary: This study examines the impact of economic growth, financial development, eco-friendly ICT, renewable energy, and human capital on lowering carbon footprint in the world's top polluting economies from 1993 to 2020. The findings suggest that eco-friendly ICT has the potential to effectively alleviate pollution, and financial development, renewable energy, and environmental technology are proposed as potential solutions for reducing carbon emissions.
Article
Geosciences, Multidisciplinary
Hikmat Salam, Syed Ali Turab, Asghar Ali, M. Qasim Jan, Norasiah Sulaiman, Mohd Basril Iswadi Basori
Summary: The Kahi melange complex in NW Pakistan is an important record of the tectonic evolution between the Indian plate and the Afghan block, consisting of highly dismembered ophiolitic and sedimentary units.
Article
Geosciences, Multidisciplinary
Er-Kun Xue, Wei Wang, David Chew, Manoj K. Pandit, Xin Deng, Yang Tian, Xi-Run Tong, Jun-Hong Zhao
Summary: The study reveals the presence of water-fluxed melting during the Wuyi-Yunkai Orogeny in South China. These water-fluxed melting quartzo-feldspathic migmatites formed during the early Paleozoic and were melted through reactions involving water-saturated quartz, feldspar, biotite, and K-feldspar. The findings highlight the significance of water-fluxed anatexis in the differentiation of the continental crust during orogenesis.
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
Laura Petrescu, Felix Borleanu, Emanuel Kaestle, Randell Stephenson, Anica Placinta, Oleksandr Ivanovich Liashchuk
Summary: This study investigates the seismic structure of the Eastern European lithosphere and the transition from Precambrian to Phanerozoic Europe. The results show that the crust thickens across the Trans European Suture Zone boundary and the mantle is seismically faster beneath younger terranes. The Precambrian building blocks exhibit contrasting seismic fabrics, with the Baltic orogens characterized by uniform crust and the Sarmatia region showing alternating high and low velocity layers.
Article
Geosciences, Multidisciplinary
Dongya Zou, Hongfu Zhang
Summary: This study analyzes the U-Pb-Hf-O isotopes of zircons in felsic granulite xenoliths from the Fuxin late Cretaceous basalts in the North China Craton to evaluate the role of magma underplating in modifying the Archean lower crust. The results show that long-lived magma underplating occurred beneath the Fuxin region during the Mesozoic, with underplated magmas originating from the lithospheric mantle and later from the depleted asthenospheric mantle. This study concludes that magma underplating not only provided heat for remelting, but also added exotic material and weakened the lower crust, leading to its destruction.
Article
Geosciences, Multidisciplinary
Yu Han, Yingchang Cao, Chao Liang, Keyu Liu, Fang Hao
Summary: A paleoclimate reconstruction based on high-resolution records from lacustrine shale in the Bohai Bay Basin reveals a shift in orbital variability and a humidification event at -41.9 Ma in East Asia. The intensification of the East Asian monsoons at this time was likely a response to the elevated atmospheric pCO2 during the concurrent global warming.
Article
Geosciences, Multidisciplinary
Francesca Innocenzi, Sara Ronca, Stephen Foley, Samuele Agostini, Michele Lustrino
Summary: This study investigates two volcanic provinces in the western branch of the East African Rift and finds that the volcanic products show wide variability in chemical and mineralogical characteristics. Petrographic and geochemical analysis reveals enriched and heterogeneous sub-lithospheric mantle sources. The differences in isotopic features between the two volcanic provinces may indicate changes in the composition, mineralogy, and depth of melting in the lithospheric mantle source.