Article
Geosciences, Multidisciplinary
A. Peketi, G. Sriram, A. Mazumdar, P. Dewangan, A. Zatale, V. Rajurkar, Gayatri Shirodkar, V. Mahale, V. Yatheesh
Summary: This study investigates 13 submarine seamounts in the southern Andaman volcanic arc and observes evidence of hydrothermal activity in one of the seamounts. The evidence includes plumes rich in dissolved gases, live chemosymbiotic organisms, and the deposition of neoforming minerals. These observations suggest the development of a new hydrothermal field in the least explored Andaman Sea.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Weijiao Ma, Jinbu Li, Min Wang
Summary: The petroleum resource assessment obtained from laboratory tests on old core samples tends to underestimate the in situ resources. This study investigates the hydrocarbon loss and restoration by comparing preserved and exposed core samples. It is found that previous studies have severely underestimated the in situ hydrocarbon potential due to factors such as sample crushing and crucible waiting. A new restoration model is proposed to compensate for these losses.
MARINE AND PETROLEUM GEOLOGY
(2024)
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
Yuhao Gao, Yifan Zhu, Junxi Chen, Xue Yang, Yiting Huang, Fenghao Song, Yangbo He, Zhengchao Tian, Lirong Lin, Chongfa Cai, Jiazhou Chen
Summary: The cropland in the Songnen phaeozems area in Northeast China is experiencing extensive gully erosion. This study reveals the historical trends, current status, and future trajectories of permanent gully development in order to understand the mechanisms and protect the black soil. The results show that gully density has consistently increased over time, with the northern area experiencing the highest development rate. Reclamation after filling gullies has led to the rapid development of secondary gullies, highlighting the need for improved field drainage systems. The notable increase in gully development rates warrants attention and caution in gully management measures.
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
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
Shigang Liu, Liyan Zhang, Rui Wang, Puqing Song, Xing Miao, Hai Li, Yuan Li, Longshan Lin
Summary: Skipjack tuna is one of the most commercially important marine fish species, and its stocks in the Indian Ocean are potentially significantly affected by climate oscillations. This study investigated the relationship between climatic indices and skipjack tuna catch per unit effort (CPUE), and established a predictive model to optimize the utilization of this species in the Indian Ocean.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Ru Yu, Hongyuan Zhang, Fangdi Chang, Jiashen Song, Jing Wang, Xiquan Wang, Zhengrong Kan, Na Zhao, Xiaohong Li, Jun Ma, Yuyi Li
Summary: Soil multifunctionality and crop production are crucial for sustainable agricultural development. This study found that mixed sowing of feed rape and vicia villosa can increase soil active carbon and nitrogen content, as well as enzyme activities, leading to improved soil multifunctionality and wheat yield.
Article
Geosciences, Multidisciplinary
Manoranjan Mishra, Tamoghna Acharyya, Bijay Halder, Celso Augusto Guimara Santos, Richarde Marques da Silva, Nihar Ranjan Rout, Debdeep Bhattacharyya
Summary: This study comprehensively analyzes the impacts of Tropical Cyclone Yaas on the mangrove forest in Bhitarkanika National Park, revealing significant ecosystem loss and changes in vegetation vigor and soil conditions, particularly an increase in salinity.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Runlong Sun, Peng Sun, Haiqing Yu, Peilong Ju, Shuyang Ma, Zhenlin Liang, Mikko Heino, Yunne-Jai Shin, Nicolas Barrier, Yongjun Tian
Summary: The Yellow Sea has experienced overfishing, leading to changes in the community structure. The development of a multi-species OSMOSE model allowed researchers to simulate different fishing scenarios and observe the impact of fishing pressure on the Yellow Sea ecosystem. Long-term fishing pressure resulted in a decline in biomass, body sizes, and longevity of modeled species. The study suggests that reducing fishing pressure can help restore the ecosystem and increase the proportion of elder and larger individuals.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
A. C. Arriola-Velasquez, A. Tejera, I. Alonso, F. Camara, M. Cantaluppi, H. Alonso, N. Miquel-Armengol, J. G. Rubiano, P. Martel
Summary: Erosion and accumulation of coastal areas have become a growing concern. Natural radionuclides are proposed as tracers to study coastal sediment transport. This study analyzed the spatial distributions of four radionuclides and found their suitability in identifying sediment dynamics and their correlation with mineral composition.
Article
Energy & Fuels
K. H. Kvalsvik, H. Holmberg, R. K. Ramstad, K. Midttomme
Summary: This study proposes a new analytical equation that takes into account the advective heat in fractured rock, improving the accuracy of measuring thermal properties in borehole heat exchangers. The equation is applicable to all thermal response tests and provides a cost-effective alternative to numerical modelling.
Article
Geosciences, Multidisciplinary
Shuyan Cui, Yushan Xiao, Yuting Yang, Zhongmin Hu, Guo Zheng
Summary: This study proposed a framework to analyze and decompose ecosystem water use efficiency (WUE) into component processes and investigated its spatial patterns and determinants using data from global Fluxnet sites. The results showed that crop had the highest WUE, and air temperature and precipitation were key factors influencing WUE. Additionally, leaf area index (LAI) and the ratio of ambient to intercellular CO2 concentration at canopy level (C-i/C-a) were identified as important factors controlling the spatial variations in ecosystem WUE.
Article
Geosciences, Multidisciplinary
Tingxi Liu, Xueqin Wang, Mingyang Li, Dongfang Li, Limin Duan, Xin Tong, Guanli Wang
Summary: Soil respiration plays a crucial role in the global carbon cycle in arid and semi-arid regions, and is regulated by hydrothermal factors. This study examined the seasonal and diurnal dynamics of soil respiration in two typical ecosystems in northern China, and investigated their responses to precipitation, temperature, and drought. The results showed that soil respiration varied seasonally and diurnally, and its response to environmental factors depended on the ecosystem type and soil moisture status. Incorporating multiple factors into carbon cycle models can improve the simulation and prediction of carbon emissions in arid and semi-arid regions.
Article
Engineering, Geological
Yan-Guo Zhou, Dong-Chao Zhang, Kai Liu, Yun-Min Chen
Summary: This study investigated the large deformations caused by liquefaction in sloping ground and the methods for evaluation and mitigation. Soil element tests and centrifuge model tests were conducted to study the relationship between residual strain and Post-liquefaction Deformation Potential (PLDP). The tests showed that the developments of residual strain were controlled by PLDP, which is correlated with the maximum cyclic shear strain. The applicability of PLDP was verified in model tests, and the mitigation mechanisms of densification and drainage induced by stone columns were observed.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Geosciences, Multidisciplinary
Yaochen Xu, Ninghua Chen, Deguo Zhang, Bowen Gao, Xuhua Weng, Hongcheng Qiu
Summary: This study provides systematic investigation on how yardangs exert control over dune morphology, and reveals the intricate wind dynamics and mechanisms involved. Computational fluid dynamics modeling and remote sensing data further support the observations and shed light on the influences of yardangs on wind deposition and dune formation.
Article
Computer Science, Interdisciplinary Applications
C. Chavez-Negrete, F. J. Dominguez-Mota, R. Roman-Gutierrez
Summary: To accurately simulate groundwater flow in porous layered media, it is important to consider all environmental factors and use a generalized finite differences scheme as a meshless method for spatial discretization. This approach ensures robustness and accuracy of the numerical solution.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shuairun Zhu, Lulu Zhang, Lizhou Wu, Lin Tan, Haolong Chen
Summary: This paper investigates the effectiveness of the cascadic multigrid method applied to the improved Picard iteration method for solving nonlinear problems in deforming variably saturated porous media. Two improved Picard iteration methods are proposed, and their effectiveness is verified through numerical examples. The results show that the improved methods have faster convergence and higher computational efficiency compared to the classical method.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Geosciences, Multidisciplinary
Mohamed A. K. El-Ghali, Olga Shelukhina, Iftikhar Ahmed Abbasi, Mohamed S. H. Moustafa, Osman Salad Hersi, Numair A. Siddiqui, Khalid Al-Ramadan, Abdullah Alqubalee, Abdulwahab Muhammad Bello, Abduljamiu O. Amao
Summary: This study employs an integrated depositional and sequence stratigraphic approach to assess the control of diagenesis on reservoir porosity of a hybrid-energy delta system. The study focuses on the Barik Formation in the Haushi-Huqf region of Central Oman, which represents a highstand system tract of a hybrid-energy delta. The assessments reveal that the reservoir porosity is controlled by various degrees of diagenetic processes, including mechanically infiltrated clays and kaolinitization of silicate grains.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Computer Science, Interdisciplinary Applications
Yinghao Deng, Yang Xia, Di Wang, Yan Jin
Summary: This study investigates the mechanism of hydraulic fracture propagation in laminated shale, develops a numerical solver, and validates the effectiveness of the method through simulation experiments. The study also examines the influence of the interaction between hydraulic fractures and weak interfaces on the mechanical properties of shale.
COMPUTERS AND GEOTECHNICS
(2024)
