Article
Geosciences, Multidisciplinary
William J. Schmelz, Kenneth G. Miller, Robert E. Kopp, Gregory S. Mountain, James V. Browning
Summary: Spatial analysis of sea-level estimates derived from backstripping Mid-Atlantic margin cores reveals a coherent signal of topographical uplift occurring over the region since 35 Ma, potentially superimposed upon Cenozoic subsidence linked to the subducted Farallon plate. Statistical modeling suggests that ocean basin volume variations likely contributed to a global-mean geocentric sea-level fall of 39 +/- 24 m over the past 55 million years, with Cenozoic subsidence unlikely to have exceeded 100 m.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Zhongxian Zhao, Zhen Sun, Xiaoxi Zhu, Penggao Fang, Jie Liao, Liheng Sun, Zhe Zhang
Summary: The complex subduction system surrounding the South China Sea region has driven mantle upwelling, which has had significant effects on basin subsidence, rifting, and magmatism. By analyzing seismic interpretation, strain rate calculation, and subsidence analysis, this study has identified two stages of extension and varying strain rates in the northwest margin of the South China Sea during the syn-rifting period. The analysis also revealed the initiation and decay of mantle upwelling and its spatial variations, providing insights into the dynamics of the region.
Review
Geosciences, Multidisciplinary
Shuhai Xiao, Zhe Chen, Ke Pang, Chuanming Zhou, Xunlai Yuan
Summary: The Shibantan Lagerstatte in South China is a well-known example of Ediacaran fossil assemblages preserved in marine carbonate rocks, dominated by benthic organisms. The fossils provide important data for understanding ecological interactions among mobile bilaterians, sessile benthic Ediacara-type organisms, and microbial mats, shedding light on the decline of the Ediacara biota and the expansion of bilaterian bioturbation and mobility across the Proterozoic-Phanerozoic transition.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2021)
Article
Engineering, Marine
Fenlian Wang, Gaowen He, Xiguang Deng, Yong Yang, Jiangbo Ren
Summary: Rare earth elements and yttrium (REY) are considered strategic materials for advanced technological applications. Deep-sea sediments from the eastern South Pacific and central North Pacific are potential resources with significant REY contents, mainly concentrated around seamounts. The factors controlling the formation of REY-rich sediments remain controversial, with age controls generally absent due to the lack of biostratigraphic constraints.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Erica Piccirilli, Rita Sorrentino, Federico Lugli, Eugenio Bortolini, Sara Silvestrini, Claudio Cavazzuti, Sara Conti, Szabolcs Czifra, Katalin Gyenesei, Kitti Kohler, Karoly Tanko, Antonino Vazzana, Erzsebet Jerem, Anna Cipriani, Antonio Gottarelli, Maria Giovanna Belcastro, Tamas Hajdu, Stefano Benazzi
Summary: The Iron Age is characterized by the movements of Celts in Europe, and through the analysis of dental traits, this study found statistically significant differences between Celts and local Italian populations, while the Celtic groups from Hungary and Italy share a similar biological background, supporting the hypothesis of a common origin for these Celts. The presence of Steppean ancestry in both Hungarian and Italian Celts suggests a westward migration of individuals and genes from the Steppe towards northern Italy during the Bronze and Iron Age. Furthermore, this study supports the existence of Celtic migratory routes in northern Italy.
Article
Environmental Sciences
Yufei Wang, Meng Zhou, Zhaoru Zhang, Michael S. Dinniman
Summary: Intrusions of warm and nutrient-rich CDW across the Ross Sea shelf break play a crucial role in ice shelf basal melting and creating the physical environment for biochemical processes. Various mechanisms, including mesoscale eddies and interactions between ocean currents and topographic features, drive CDW intrusions into the Ross Sea. This study investigates the seasonal variations in CDW transport using wind data and a circulation model. The results suggest that CDW intrusions occur mainly along deep troughs in the eastern flanks of the shelf, and their timing is correlated with ocean surface stress fields and Ekman pumping. The findings emphasize the importance of air-sea interactions and potential climate change in the Ross Sea environment.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geochemistry & Geophysics
Yu-Tong Su, Zong-Feng Yang, Shuang-Yan Guo, Pei-Pei Li
Summary: The Hannuoba basalt in northern China is a continental basalt that has been extensively studied but its origin and deep processes are still unclear. This study examines the composition and magmatic processes of the Hannuoba basalt and finds that there are two types of basalts with significant differences in composition. The mixing of heterogeneous lower crust is believed to be the cause of the compositional heterogeneity, indicating a more complex contribution of the continental lower crust to continental basalt.
AMERICAN MINERALOGIST
(2023)
Article
Geology
Berit Oline Hjelstuen, Hans Petter Sejrup
Summary: By compiling data on sediment volumes, sedimentation rates, and chronology of Quaternary sediment packages along the entire marine margin of the Eurasian ice sheets, the development of the Eurasian ice sheets can be divided into three phases. The data suggests that at the beginning of the Quaternary, sedimentation rates increased significantly, and the Kara-Barents Sea-Svalbard Ice Sheet was already quite large.
Article
Ecology
Joshua H. Miller, Brooke E. Crowley, Clement P. Bataille, Eric J. Wald, Abigail Kelly, Madison Gaetano, Volker Bahn, Patrick Druckenmiller
Summary: The study shows that shed caribou antlers can extend the temporal scope for evaluating seasonal landscape use of herds, and antler geochemistry reflects data on seasonal landscape use. Research on caribou antlers from the Coastal Plain of the Arctic National Wildlife Refuge in Alaska indicates that isotopic analysis can go back decades to centuries.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Article
Geosciences, Multidisciplinary
Shendong Xu, Zhinan Zhang, Kefu Yu, Xueyong Huang, Hanji Chen, Zhenjun Qin, Risheng Liang
Summary: The study demonstrates that corals can adjust their trophic status based on different environmental and physiological conditions, with corals with higher photosynthetic rates and autotrophic abilities primarily found in Sanya, while corals with higher heterotrophic abilities predominantly found in Xisha and Nansha. Additionally, a negative correlation was found between coral tissue biomass and skeletal delta C-13, indicating that the more organic material produced by the coral, the stronger its heterotrophic ability is.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Claudio Garbelli, Anna Cipriani, Uwe Brand, Federico Lugli, Renato Posenato
Summary: The Dolomites is a significant region for studying the evolution of shallow-marine ecosystems during the end-Permian mass extinction. By using strontium isotope stratigraphy, the correlation between the Dolomites and the Meishan section can be established, contributing to the understanding of the biological crisis that occurred.
Article
Geosciences, Multidisciplinary
Lei Zhang, Tao Wang, Jian-jun Zhang, Xin -jun Shi, Hai-dong Ren, Qi-di Yang, Ying Tong, Lei Guo
Summary: This study presents a compilation of zircon U-Pb age and Hf isotopic data from the granitoids in the Alxa area. The results show that the granitoids in the central Alxa area have juvenile isotopic features, while the granitoids in the western Alxa area have ancient isotopic features. Based on these findings, it is inferred that there is a boundary between the North China Craton and the Central Alxa Orogenic Belt in the Alxa area.
Article
Geography, Physical
April S. Dalton, Tamara Pico, Evan J. Gowan, John J. Clague, Steven L. Forman, Isabelle McMartin, Pertti Sarala, Karin F. Helmens
Summary: There is disagreement about how much of the marine 818O signal is driven by ice volume change. This study examines the topic by combining geological data and modeling work for Marine Isotope Stage 3 (MIS 3). The results indicate that the inferred ice volume from the marine 818O record does not fit within the plausible extent of Northern Hemisphere ice sheets during MIS 3. Instead, a lower global mean sea level is inferred from geological constraints and modeling. Therefore, caution is advised when using the marine 818O record as an indicator of continental ice without sufficient geological constraints.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geosciences, Multidisciplinary
Harunur Rashid, Jianing He, Ranjan Patro, A. Owen Brown
Summary: Late Pleistocene Labrador Sea depositional systems, developed in front of ice streams and glacier outlets from the Laurentide Ice Sheet (LIS), were investigated. The position of the Hudson Strait ice stream during the periodic expansion and contraction on the Labrador margin was found to be different from other events, indicating a divergence in the H3 layer between the eastern and western North Atlantic.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Environmental Sciences
Tetsuya Matsunaka, Seiya Nagao, Mutsuo Inoue, Rodrigo Mundo, Saki Tanaka, Ning Tang, Masa-aki Yoshida, Masanori Nishizaki, Masaya Morita, Tetsutaro Takikawa, Nobuo Suzuki, Shouzo Ogiso, Kazuichi Hayakawa
Summary: This study monitored the concentrations of phase-partitioned polycyclic aromatic hydrocarbons (PAHs) in seawater off Oki Island, Japan, from 2015 to 2019, aiming to understand the seasonal variations, main sources, and transport pathways of PAHs in the southwestern Sea of Japan. The results showed that combustion products were the main sources of both dissolved and particulate PAHs. Higher concentrations of PAHs were observed in summer-autumn, and it was found that the area around southern Oki Island was impacted by PAH-rich summer continental-shelf water transported by the Tsushima Warm Current flowing from the East China Sea.
MARINE POLLUTION BULLETIN
(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.