Article
Geosciences, Multidisciplinary
Zhiguo Zhang, Xijun Liu, Wenjiao Xiao, Ji-Feng Xu, Yu Shi, Xiaohan Gong, Rongguo Hu, Pengde Liu, Yujia Song, Yao Xiao, Zhaoqi Zhang, Rui Li, Dechao Li
Summary: The study of Carboniferous magmatism in northern West Junggar reveals that the volcanic rocks from the Hamutusi area record the initiation of ridge subduction related to a transition from normal subduction to subduction of young and hot oceanic lithosphere between the early and late Carboniferous.
Article
Geochemistry & Geophysics
Weice Zhang, Zhidan Zhao, Dong Liu, Kunfeng Qiu, Qing Wang, Di-Cheng Zhu, Tiannan Yang, Yingchao Liu, Rui Wang, Zengqian Hou, Xuanxue Mo
Summary: Ore deposits in the Southern Lhasa Terrane that formed prior to the India-Eurasia collision are rare and not well understood. This study provides insights into the tectonic setting, geochemistry, and petrogenesis of the Kelu and Sangbujiala skarn Cu-Au deposits, which are associated with a Late Cretaceous magmatic flare-up.
Article
Geochemistry & Geophysics
Chu Wu, Chengxi Wang, Tao Hong, Xingwang Xu, Xiao Zheng, Wanjuan Liang, Kefeng Sun, Huijun Zhang, Lianhui Dong, Bin Wang
Summary: Abundant primary tourmalines, accompanied by pyrite and with a high affinity for Cu and Au mineralization, have been found in the Shiwu porphyry Cu-Au deposit in NW China. A combined study of the petrology, geochronology, isotope, and mineral geochemistry data has been completed, indicating that the injection of mantle-derived magma was critical for the formation of the deposit.
Article
Geosciences, Multidisciplinary
Lipeng Zhang, Yongbin Hu, Jianghong Deng, Jinrong Wang, Kun Wang, Qinglin Sui, Yuxiao Chen, Kai Wu, Weidong Sun
Summary: The study focuses on large-scale Late Cretaceous magmatic intrusions in the southern Gangdese magmatic belt, presenting new insights into their genesis and mineralization potential. The Chemen granodioritic intrusion, with a similar U-Pb age to other Late Cretaceous intrusions in the region, exhibits geochemical characteristics resembling adakites. High oxygen fugacity during crystallization is indicated by Ce4+/Ce3+ ratios in zircon and SO3 contents of apatite in the Chemen intrusion. Although the Chemen intrusion shows great mineralization potential, some Late Cretaceous intrusions in the region have low oxygen fugacity, limiting mineralization extent.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geology
Raymond M. Russo, Haipeng Luo, Kelin Wang, Boudewijn Ambrosius, Victor Mocanu, Jiangheng He, Thomas James, Michael Bevis, Rui Fernandes
Summary: The geographic coincidence of the Chile Ridge slab window and the Patagonia ice fields provides a unique opportunity to assess the effects of slab window rheology on glacial isostatic adjustment. Using newly collected or processed geodetic data, the study found that the mass loss of the ice fields since the Little Ice Age caused varying rates of crustal uplift, with the North Patagonia ice field experiencing 12-24 mm/yr uplift and the South Patagonia ice field reaching a maximum of 41 mm/yr. A three-dimensional viscoelastic finite element model was used to analyze the GIA response, revealing that the viscosity of the northern part of the slab window is approximately one order of magnitude lower than that of the southern part.
Review
Geosciences, Multidisciplinary
Ji'en Zhang, Yichao Chen, Wenjiao Xiao, John Wakabayashi, Brian F. Windley, Jiyuan Yin
Summary: The study of NW China suggests that the Western Junggar and Central-North Tianshan may have been in contact during the Early Paleozoic period, showing evidence of plate evolution and magmatic activity during the Late Silurian to Early Devonian. By re-evaluating the geological features of the region, a new model proposing sub-parallel ridge-trench interaction has been put forward to explain the orogenic processes in the Late Silurian-Early Devonian period.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Yangming Wu, Jie Liao, Jiarong Qing, Yongqiang Shen
Summary: The study investigates the development of subduction in the tectonic setting where mid-ocean ridges and passive continental margins are juxtaposed using a 2-D numerical model. The results reveal three types of oceanic plate subduction: continental margin subduction, ridge-inversed subduction, and a transitional type with double subduction along ridges and margins. The physical parameters that influence the formation of these subduction types are systematically analyzed. The study emphasizes the significance of preexisting weakness along passive margins in promoting subduction development.
Article
Geochemistry & Geophysics
Isaac Corral
Summary: The Cerro Quema deposit in southwestern Panama is a high-sulfidation epithermal Au-Cu deposit with oxide resources of 24.60 Mt at 0.71 g/t Au and 0.04% Cu, and sulfide resources of 11.38 Mt at 0.41 g/t Au and 0.31% Cu. Alunite 40Ar/39Ar dating suggests a formation age of approximately 49 million years ago, linking it to the Valle Rico batholith intrusive event. This deposit, along with the Rio Pito porphyry copper deposit, formed during the early arc stage in different geological settings.
Article
Geology
Jingmin Gan, Wenjiao Xiao, Qigui Mao, Hao Wang, He Yang, Miao Sang, Xiaoliang Jia, Yin Liu, Zhiyong Zhang, Zhou Tan, Rui Li
Summary: This study reports new geochronological, geochemical, and isotopic data for the magmatic rocks collected from the northern part of the Dulate arc in the southern Altaids. The findings suggest that the magmatic rocks in the study area were derived from the partial melting of a subducted oceanic slab. The study also proposes that ridge subduction is one of the most effective mechanisms of continental growth in the southern Altaids, based on the analysis of rock associations and spatial-temporal relationships.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geology
Dongdong Liu, Chen Zhang, Canxing Li, Jing Guo, Ziya Zhang, Zhixin Huang, Zhankun Pan
Summary: The study reveals that the granitic plutons were formed from different crustal materials; while the granites exhibit geochemical characteristics similar to A-type granitoids, the quartz monzodiorites likely originated from subducted oceanic crust.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geosciences, Multidisciplinary
Teng Gao, Juxing Tang, Liqiang Wang, Baoliang Li, Yong Wang, Chuanyang Lei
Summary: The Saidengnan deposit is proposed as the first intra-oceanic island-arc porphyry Cu (Au) deposit in the Bangong-Nujiang metallogenic belt. The mineralization is hosted in quartz diorite porphyry and occurred in the Early Cretaceous. The ore-forming fluids were sourced from the ore-forming intrusion, and the intrusive rocks were derived from mantle wedge metasomatized by subducted fluids and sediments.
Article
Geosciences, Multidisciplinary
Pei Liang, Huayong Chen, Liandang Zhao, Chao Wu, Yuling Xie, Chun-Kit Lai
Summary: The study on the Laoshankou deposit suggests that ore-fluid sources include marine pore fluid affected by seawater and bittern fluid formed through seawater evaporation, with possible influence from meteoric water later on. This non-magmatic fluid source interpretation challenges previous assumptions of magmatic-hydrothermal origin and provides new insights for understanding Paleozoic Fe-Cu (-Au) deposits in the Central Asian Orogenic Belt.
GEOSCIENCE FRONTIERS
(2021)
Article
Geosciences, Multidisciplinary
Yaqi Yang, Lei Zhao, Jin Zhang, Manlan Niu
Summary: This study conducted detailed field investigations in the Saier Mountains of the West Junggar, revealing multiple episodes of magmatism and deformation events, contributing to a better understanding of the geological evolution in the region. The findings suggest a prolonged and episodic post-collisional extension in the northern WJ and provide insights into the orogenic process of the Central Asian Orogenic Belt.
Article
Geochemistry & Geophysics
Pengde Liu, Xijun Liu, Wenjiao Xiao, Zhiguo Zhang, Yao Xiao, Yujia Song, Hao Wu
Summary: Magnesian and/or Nb-rich dioritic-andesitic rocks have been found in the Mayile area of southern West Junggar, Northwest China. This study conducted a comprehensive investigation to understand the origin, mantle source, and tectonomagmatic processes in the southern Paleo-Asian Ocean subduction zone. The results suggest that the Mayile rocks formed in the Late Carboniferous and experienced high-temperature and shallow-level partial melting in a mantle wedge. These rocks exhibit characteristics of sanukitic high-Mg andesites and provide insights into the subduction history and tectonic evolution in the region.
Article
Geosciences, Multidisciplinary
Luigi Passarelli, Simone Cesca, Nima Nooshiri, Sigurjon Jonsson
Summary: The resistance of bathymetric highs to subduction results in large-scale morphological distortions of the outer-rise, trench, and fore-arc regions. Complex earthquake activity and segmentation of the interface are observed in the collision and subduction of the Loyalty Ridge, indicating a frictionally segmented interface where Mw >= 8 megathrust earthquakes are unlikely to occur.
GEOPHYSICAL RESEARCH LETTERS
(2022)
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
Bingshuang Zhao, Xiaoping Long, Jin Luo, Yunpeng Dong, Caiyun Lan, Jingyu Wang, Bin Wu
Summary: The study revealed distinct age characteristics and isotopic compositions of detrital zircons in the late Neoproterozoic to early Paleozoic sedimentary rocks on the northwestern margin of the Yangtze block, indicating significant changes in tectonic settings over time.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Kai Wang, Keda Cai, Min Sun, Xiangsong Wang, Xiao-Ping Xia, Bo Zhang, Bo Wan
Summary: In this study, the petrogenetic relationship between melanges and alkaline arc rocks in Western Tianshan was established through field, geochronologic, geochemical, and thermodynamic investigations. The findings support the hypothesis that diapir melting of subducted melanges can generate alkaline arc magma, and provide insight into material recycling at subduction zone settings.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Jing Zhao, Xiaoping Long, Jie Li, Bingshuang Zhao, Yilin Gao, Rui Zuo
Summary: This study investigates the problematic Aoyougou serpentinites in the Qilian Orogenic Belt, NW China. The results suggest that the protoliths of these serpentinites are melting residues of oceanic lithospheric mantle in a forearc setting. Petrographic observations, mineral chemistry, geochemistry, and Re-Os isotopic compositions indicate multiple episodes of partial melting and melt/fluid metasomatism, potentially triggered by slab-derived melts/fluids. The study also proposes an intra-oceanic subduction model to interpret the origin and evolution of the ophiolite.
Article
Geology
Bin Wu, Xiaoping Long, Shitao Zhang, Yunying Zhang, Zongying Huang, Long Du
Summary: This study presents new geochronological and geochemical data on volcanic rocks and intrusions in the Aqishan-Yamansu Belt, showing evidence of crustal evolution and subduction processes in the area.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Raja Asim Zubair, Xiaoping Long, Mirza Shahid Baig
Summary: The study focuses on the structural geometry, kinematics, and paleo-stress analysis of the Main Boundary Thrust in the Himalayan fold and thrust belt in Kashmir. It reveals a history of pure thrust with subordinate strike-slip movements along the Main Boundary Thrust in the Eastern limb of Hazara Kashmir Syntaxis.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Bin Wu, Xiaoping Long, Caiyun Lan, Shitao Zhang, Rui Zuo, Jingyu Wang
Summary: This study provides new geochronological and geochemical data for rocks in the Jining area, contributing to a better understanding of the tectonic evolution of the Paleoproterozoic Khondalite Belt in the North China Craton. The results suggest that the Belt experienced extension at around 2.3 Ga, followed by collision events at around 2.0-1.9 Ga. The formation of different rock types can be attributed to processes such as subduction and partial melting of the lower continental crust.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Guoshun Zheng, Jiangfeng Qin, Shaocong Lai, Xiaoping Long, Yinjuan Ju, Zezhong Zhang, Hongbing Zhang
Summary: This study reports the geochemical characteristics and formation mechanism of a Late-Triassic high-Mg andesite in the southern part of the Zhangguangcai Range. The results suggest that the high-Mg andesite was formed by hydrous melting of the mantle wedge, which was metasomatized by slab-derived adakitic melts and assimilated ancient crust.
GEOLOGICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Jingyu Wang, Xiaoping Long, Caiyun Lan, Bin Wu, Rui Zuo
Summary: This study investigates the magmatic activity during the early Paleoproterozoic era in the southern North China Craton (NCC) and identifies ca. 2.3 Ga mafic magmatic records. The rocks exhibit geochemical features of island arc magmas and likely originated from partial melting of a garnet-spinel lherzolite, undergoing a process of hydrous fractionation. The findings suggest that continental tectonic activity continued during the early Paleoproterozoic, contrary to the notion of a global tectonic lull.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Rui Zuo, Xiaoping Long
Summary: By studying the geochronology and geochemistry of mafic dykes in the Aktash Tagh area of the southeastern Tarim Craton, this research provides constraints on the petrogenesis and tectonic evolution of the Neoproterozoic Tarim Craton. The results suggest that these dykes were formed in an extensional setting, likely related to intra-continent rifting, and originated from a modified asthenospheric mantle source enriched by ancient slab-derived fluids.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Jing Zhao, Qianru Xiao, Yilin Gao, Rui Zuo, Luyu Huang, Jie Li, Xiaoping Long
Summary: The geochemical characteristics and Re-Os isotopes of serpentinites in the Qilian Orogenic Belt reveal their origin as mantle residues and multiple episodes of melt depletion, indicating two major periods of mantle melting during the Proterozoic.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geology
Caiyun Lan, Xiaoping Long
Summary: The Paleoproterozoic Great Oxidation Event (GOE) led to a dramatic change in atmospheric composition, making oxygen a persistent component in global surface processes. However, the distribution of dissolved oxygen in the ocean during this event remains unclear. By analyzing samples from the Upper Taihua Group in the Lushan area, researchers found evidence of redox-stratified seawater and a marine depositional setting. The presence of both oxic and suboxic/anoxic water in the ocean during the GOE was revealed, suggesting extensive redox stratification.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Bin Wu, Yujing Wang, Xiaoping Long
Summary: This study focuses on the early Paleoproterozoic tectonic evolution in the Guyang area, analyzing various rocks such as granodiorite and monzonitic diorite. Zircon U-Pb dating suggests these rocks were formed around 2.46-2.41 billion years ago. The granodiorite may have been formed by partial melting of a subducting oceanic slab, while the monzonitic diorite could be derived from melting of mantle peridotite metasomatized by adakitic melts. The alkali feldspar granite shows characteristics of A-type granites, indicating an extension background.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Jingyu Wang, Yujing Wang, Caiyun Lan, Xiaoping Long
Summary: The provenance and depositional age of clastic rocks from the Kuanping Group in the northernmost North Qinling Orogenic Belt are crucial for understanding the tectonic evolution of the region. The clastic rocks show signs of moderate to strong weathering and are believed to have originated from an active continental margin. Detrital zircon analysis suggests that the main source of these rocks was early Neoproterozoic granitoids, indicating a lack of tectonic affinity to other cratons during that period.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geology
Shen Anhang, Li Jie, Long XiaoPing, Hu AnPing, Liu JunJie, Yin QiChun, Gong Zan
Summary: This study reveals the presence of pervasive pore-filling bitumen in the dolomite reservoir of the Member 4, Sinian Dengying Formation in the northern margin of the Sichuan Basin. The Re-Os radioisotope system has been used to determine the age and source of the bitumen, providing important insights for the evaluation of natural gas exploration in this area.
ACTA PETROLOGICA SINICA
(2022)
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.
