Article
Geochemistry & Geophysics
Rongsong Tian, Guoai Xie, Wenbin Zhu, Shuang Gao
Summary: This study identifies a Late-Paleozoic magmatic flare-up in the Nuoergong-Langshan Belt in the Alxa Block through geochronological and geochemical analysis, suggesting a possible relationship between these flare-ups and crustal thickening in continental arcs. The distribution of late Paleozoic magmatic rocks in the northern Alxa Block indicates a retreating accretionary orogeny of the Paleo-Asian Ocean.
Article
Geochemistry & Geophysics
Dong Wei, Suhua Jiang, Jie Liu, Sanzhong Li, Lingli Guo, Ian Somerville, Xueting Guan, Yinuo Liu, Yubin Chen
Summary: This paper explores the spatio-temporal distribution of the Mesozoic magmatic arc on the East Asian Continental Margin (EACM) using gravity and magnetic responses. The study finds that the tectonic features of the magmatic arc are more apparent in the fourth-order approximation/detail gravity anomaly fields. Furthermore, the analysis of residual crustal gravity anomalies helps identify the Jurassic magmatic arcs. Overall, this study contributes to understanding the formation and refinement of the Paleo-Pacific Plate subduction mechanism and the Mesozoic tectonic evolutionary model of the EACM.
Article
Geosciences, Multidisciplinary
Qingbin Guan, Zhenghong Liu, Yongjiang Liu, Sanzhong Li, Shijie Wang, Zhaoxu Chen, Cao Zhang
Summary: This study presents new evidence for the tectonic transition from the Paleo-Asian to the Paleo-Pacific regimes in the easternmost part of the Central Asian Orogenic Belt. The findings suggest a complex history of magmatism during the early Mesozoic, with different stages of igneous rock formation corresponding to different tectonic environments.
Article
Geosciences, Multidisciplinary
Yi-Ni Wang, Wen-Liang Xu, Feng Wang, Xing-Zhou Zhang
Summary: The Late Paleozoic-Mesozoic tectonic evolution of the northeastern Asian continental margin experienced two stages: the Paleo-Asian Ocean tectonic regime and the Paleo-Pacific tectonic regime. Geological records and crustal structure studies provide new insights into this evolution.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Fatemeh Nouri, Ali Reza Davoudian, Nahid Shabanian, Mark B. Allen, Yoshihiro Asahara, Hossein Azizi, Ryo Anma, Mahnaz Khodami, Motohiro Tsuboi
Summary: The Ediacaran-early Cambrian magmatic rocks in the Ardakan region of central Iran consist of deformed granites and dolerites. The geochemical characteristics of these rocks provide insights into the magma sources, formation processes, and geological events.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Xin Ma, Wei Dan, Jian Wang, Qiang Wang, Guo-Rong Tang, Mustafo Gadoev, Ilhomjon Oimahmadov, Gong-Jian Tang
Summary: This study reports the zircon U-Pb age and Hf isotope data for granites and mafic intrusions from the Pamir-Karakoram terrain, revealing four episodes of magmatism between 124-70 million years ago. These magmatic events were associated with the subduction of Neo-Tethys oceanic lithosphere and played a key role in crustal thickening in the region.
Article
Geosciences, Multidisciplinary
Chloe Yanlin Zhu, Rui Gao, Guochun Zhao
Summary: This review synthesizes the most recent data and geologic evidence that place critical constraints on the evolution of the Zhangguangcailing Orogen. The findings suggest the existence of a stable micro-continent during the Late Paleozoic, followed by extensive magmatism and continental rifting. The Late Triassic witnessed the formation of an active continental margin due to Paleo-Pacific plate subduction, and the earliest Cretaceous saw A-type granitic magmatism.
Article
Geochemistry & Geophysics
Thyego R. Silva, Valderez P. Ferreira, Mariucha Maria C. Lima, Alcides N. Sial
Summary: In this study, the authors investigated the eastern Pernambuco-Alagoas Domain in southernmost Borborema Province, NE Brazil, which is characterized by three major composite batholiths. They presented petrological, geochemical, isotopic, and geochronological data for intermediate-acid plutons, part of the Santana do Ipanema batholith, and combined them with published data to reveal the timing, petrogenesis, and tectonic evolution of the batholith. The results showed that the rocks originated from a mantle source with some crustal contamination, and the arc magmatism in the Santana do Ipanema area was triggered by underplated mafic magmas.
Article
Geochemistry & Geophysics
Jun-Hong Zhao, Oliver Nebel, Tim E. Johnson
Summary: The study of rocks from two regions in South China reveals that they may have originated from different crustal materials and experienced varying degrees of contamination, with their isotopic evolution potentially linked to spatial and temporal variations in deep crustal source rocks.
JOURNAL OF PETROLOGY
(2021)
Article
Environmental Sciences
Zhou Tan, Wenjiao Xiao, Qigui Mao, Hao Wang, Miao Sang, Rui Li, Limin Gao, Yuhong Guo, Jingmin Gan, Yanhong Liu, Bo Wan
Summary: The timing of the final welding of the southern Altaids to construct Pangea is uncertain, leading to debate about the configuration of northeast Pangea and the reconstruction of proto-Asia. Analysis of sediments in a fore-arc accretionary basin in the South Tianshan Orogenic Belt reveals that they have a maximum depositional age in the early Triassic and originate from the distal East Tianshan Arc region.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Sheng-Kai Qin, Ze-Ming Zhang, Richard M. Palin, Hui-Xia Ding, Xin Dong, Zuo-Lin Tian
Summary: This study investigates the origin and transformation of pelitic migmatites in the lower crust of the Gangdese arc in southern Tibet. The results show that the migmatites originated from Late Carboniferous sedimentary rocks and underwent high-pressure granulite-facies metamorphism and partial melting to form granitic melts. The study suggests that tectonic burial of sedimentary rocks played a key role in the building and reworking of juvenile crust in magmatic arcs.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Gong-Yu Li, Jian-Bo Zhou, Long Li
Summary: This paper reviews the tectonic affinity and origin linkage of the Jiamusi Block, and proposes an integral tectonic model to better understand the evolution history from the final amalgamation of the CAOB to the onset of the Paleo-Pacific Ocean regime.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Zhong-Quan Li, Jun-Liang Chen, Hao Zou, Cheng-Shan Wang, Qi-An Meng, Heng-Lin Liu, Shi-Ze Wang
Summary: The Songliao Basin in northeast China underwent multiple stages of structural evolution, including foreland compression, syn-rift and post-rift period, as well as structural inversion stage. These processes were influenced by the Paleo-Asian Ocean, the Mongol-Okhotsk Ocean, and the Paleo-Pacific Ocean.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Jie Li, Chen Wu, Xuanhua Chen, Andrew V. Zuza, Peter J. Haproff, An Yin, Zhaogang Shao
Summary: The Beishan orogen is part of the Central Asian Orogenic System, and the geological analysis shows that it experienced five phases of arc magmatism at different periods. The tectonic model explains the geological, geochemical, and geochronological data from the Beishan region, including Proterozoic rifting, Paleozoic subduction and collision, northward slab rollback, Carboniferous opening and Permian subduction, and Mesozoic-Cenozoic intracontinental deformation.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Geography, Physical
Tianjia Liu, Zhentao Wang, Xunlian Wang, Xifang Liu, Pengcheng Ju, Jiaai Zhong
Summary: This study investigates the source and characteristics of K-bentonites in South China during the Late Permian, suggesting that volcanic activities associated with the Paleo-Tethys Ocean convergence may have led to the formation of K-bentonites. The integration of zircon Hf isotope and trace element compositions indicates that the K-bentonites in South China may have multiple sources, with major volcanic eruptions occurring at the Ailaoshan-Sanjiang continental margins and potentially smaller eruptions at the East Kunlun or West Qinling continental margins.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geology
Shan Li, Calvin F. Miller, Wang Tao, Wenjiao Xiao, David Chew
Summary: Granite typology categorizes granitoid rocks based on distinguishing characteristics that indicate sources, generation conditions, and tectonic settings, though complexities in geochemistry often lead to more complex petrogenetic histories. Granitoids in the eastern Tibetan Plateau exhibit a wide range of geochemical characteristics and source contributions, with isotopic compositions suggesting a significant influence from sediment in their magmas of all types. The highly variable isotopic compositions of these contemporaneous granitoids from diverse sources demonstrate the difficulty of straightforward assignment and interpretation using conventional typology.
Article
Geosciences, Multidisciplinary
Yuejun Wang, Zi Liu, Sayed Murtadha, Peter A. Cawood, Xin Qian, Azman Ghani, Chengshi Gan, Yuzhi Zhang, Yang Wang, Shan Li, Peizhen Zhang
Summary: The relationship between West Borneo and the East Asia continental margin and the formation of Jurassic igneous rocks were studied using various isotopic and elemental data. The results provide important insights into the tectonics of Southeast Asia.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Junbin Zhu, Shan Li, Sayed Murtadha
Summary: The discovery of the oldest basement in Indonesian Borneo provides valuable insights into the tectonic history and terrane placements in the region. Analyses of zircon samples indicate that the Semitau Block was likely part of or adjacent to the Indochina Block of northern Gondwana during the early Paleozoic, forming an arc-related belt associated with subduction of the Proto-Tethyan Ocean.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2022)
Article
Geology
Ross N. Mitchell, Christopher J. Spencer, Uwe Kirscher, Simon A. Wilde
Summary: The interpretation of the oldest preserved crustal archive, the Jack Hills zircon in Western Australia, has been controversial in terms of the onset of plate tectonics. Time-series analysis on hafnium isotopes of the zircon reveals cycles reminiscent of plate-tectonic subduction, suggesting similarities between early Earth and present-day conditions. However, these cycles could also imply that modern plate-tectonic subduction inherited preexisting mantle convection cycles. Overall, any model for plate tectonics must consider the conditions operating during the Hadean time.
Article
Geochemistry & Geophysics
Zhenhua Zhou, Karel Breiter, Simon A. Wilde, Xu Gao, Antony D. Burnham, Xinghua Ma, Jiaqi Zhao
Summary: The Shihuiyao granite district in the southern Great Xing'an Range, Northeast China, is a newly discovered area of rare-metal-bearing granites. The Shihuiyao granites are peraluminous, enriched in rare metals, and underwent magmatic fractionation and hydrothermal reworking. They have specific geochemical characteristics, and the mineralization event occurred in the latest Jurassic.
Article
Geosciences, Multidisciplinary
Piotr Krol, Monika A. Kusiak, Daniel J. Dunkley, Simon A. Wilde, Keewook Yi, Martin J. Whitehouse, Shinae Lee, Simon L. Harley
Summary: The Napier Complex in Enderby Land and Kemp Land is a unique geological area that preserves the history of crustal growth from the early Archean to the Neoarchean. This study focused on the little-studied south-southwestern region of the complex, using zircon U-Pb dating and whole-rock geochemical analysis to investigate the rock samples from the Scott and Raggatt Mountains. The findings suggest that there are different ages and origins of magmatic and metamorphic events in the complex, highlighting the importance of understanding the regional geology.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Chunyan Dong, Mingzhu Ma, Simon A. Wilde, Shoujie Liu, Pengchuan Li, Zhongyuan Xu, Yusheng Wan
Summary: This study identified early Paleoproterozoic supracrustal rocks in the Daqingshan area, providing important insights into the Precambrian evolution of the North China Craton. The rocks were formed in a continental environment and further research is needed to determine the tectonic regime.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Hao-Dong Li, Jian-Bo Zhou, Simon A. Wilde
Summary: The Central Asian Orogenic Belt (CAOB) was formed by multiple collisional and accretionary events in the Paleo-Asian Ocean. This study focuses on the South Tianshan-Solonker Suture, the largest suture within the CAOB, and provides a systematic understanding of its nature and development. Based on Chinese literature and geochronological data, the suture zone is divided into four distinct segments, demonstrating the amalgamation between different cratons and blocks. The closure of the Paleo-Asian Ocean occurred in the late Carboniferous and continued until the late Permian. The study also highlights the influence of the Paleo-Pacific tectonic domain on the Yanji Belt in the middle-late Triassic.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Rongfeng Ge, Simon A. Wilde, Wenbin Zhu, Teng Zhou, Yang Si
Summary: This paper reviews the Archean geological record of the Tarim Craton and proposes a new model for the formation and evolution of Archean continental crust. The study reveals that most Archean TTGs were formed by water-fluxed melting of thick proto-arcs built on thick Archean oceanic crust, while rare high-pressure TTGs were formed by water-fluxed melting of subducted arcs during intermittent subduction and arc accretion.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Chunyan Dong, Rongfeng Ge, Shoujie Liu, Simon A. Wilde, Hangqiang Xie, Wenbin Zhu, Hailin Wu, Yuan Li, Yusheng Wan
Summary: By studying the Aktashtagh area in the southeastern margin of the Tarim Craton, northwestern China, multiple episodes of early Precambrian magmatism have been identified, which are important for understanding the formation and evolution of early continental crust.
Article
Geosciences, Multidisciplinary
Chunyan Dong, Zhongyuan Xu, Simon A. Wilde, Mingzhu Ma, Shoujie Liu, Shiwen Xie, Pengchuan Li, Yusheng Wan
Summary: This study reports the geochronological and petrographic characteristics of 12 magmatic samples from the Daqingshan area. The samples have magmatic zircon ages of 2530-2469 Ma, with some samples showing ages influenced by late Palaeoproterozoic tectonothermal events. Combined with previous studies, the findings suggest that the late Mesoarchaean-early Neoarchaean was a period of significant continental crustal growth, and the late Neoarchaean supracrustal and plutonic rocks likely formed in an arc environment.
GEOLOGICAL MAGAZINE
(2023)
Article
Geosciences, Multidisciplinary
M. Ram Mohan, Neal J. McNaughton, D. Srinivasa Sarma, M. Rajamanickam, Ian R. Fletcher, Simon A. Wilde, Birger Rasmussen, Bryan Krapez, S. Balakrishnan
Summary: This study presents new SHRIMP U-Pb zircon and titanite ages, whole-rock geochemical and Sm-Nd isotopic data for granitoids in the Chitradurga Greenstone Belt. The results show that the growth of the belt is related to horizontal tectonics since at least 3.2 Ga.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geology
Long Xiang Quek, Shan Li, Christopher K. Morley, Azman A. Ghani, Junbin Zhu, Muhammad Hatta Roselee, Sayed Murthadha, Rezal Rahmat, Yu-Ming Lai, Lediyantje Lintjewas
Summary: The current tectonic model for Borneo suggests that it rifted from NW Australia and collided with Eurasia, but zircon Hf trends indicate circum-Pacific-style accretionary orogens. The detrital zircon samples from SW Borneo show consistent age peaks in late Permian to Early Cretaceous. SW Borneo shares similar detrital zircon characteristics with NW Australia, and the negative eHf(t) values for 300-200 Ma are more similar to the Peninsular Malaysia Indosinian orogen. The authors suggest that SW Borneo is part of a Triassic accretion zone in eastern Cimmeria.
Article
Geosciences, Multidisciplinary
Keisuke Suzuki, Toshiyuki Kurihara, Teruki Sato, Hayato Ueda, Toshiro Takahashi, Simon A. Wilde, M. Satish-Kumar
Summary: Devonian-Carboniferous strata in the Hida Gaien belt, Southwest Japan, undergo lithological changes from clastic rocks and limestones to volcanic rocks. The sedimentary rocks during the Devonian period were derived from various basement rocks and the source shifted to basalts and rhyolites in the early Carboniferous period. Zircon grains indicate sediment supply from different areas in Eastern Asia and NE Gondwana. The Hida Gaien belt and other regions were geographically close to NE Gondwana during the Paleozoic era.
Article
Geochemistry & Geophysics
Tao Wu, Wen Zhang, Simon A. Wilde, Jianggu Lu, Guoliang Zhang, Chunfeng Li, Xuegang Chen, Shuangshuang Chen
Summary: This study develops a new in situ Pb analytical protocol and applies it to plagioclase-hosted melt inclusions from IODP Expedition 349 Site U1433 in the South China Sea. The analysis reveals extreme Sr isotopic heterogeneity in the plagioclase phenocrysts, indicating their early crystallization in the magma chamber from different batches of mantle-derived melts. The melt inclusions also show highly variable Pb isotopes, suggesting the presence of ancient cratonic lower continent crustal materials in the sub-ridge mantle of the southwest Sub-basin, SCS.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(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.
