Article
Geology
Shi-Jiong Han, Yan-Chen Yang, Jun-Wei Bo, Zi-Heng Han, Yong-wei Huang, Yun-bao Yang
Summary: The Sipingshan gold deposit in eastern Wandashan Terrane is of intermediate size and is known for its unique hot spring genetic type. Gold orebodies are mainly found in upper and lower siliceous rocks, with siliceous cemented breccia in between. Two main mineralisation periods have been identified based on mineral paragenesis and crosscutting vein relationships. Analytical methods including whole-rock geochemistry, pyrite Rb-Sr dating, zircon U-Pb-Hf contents, and isotopic analysis were conducted to determine the age and genesis of the gold mineralisation.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Emre Aydincakir, Cem Yucel, Abdullah Kaygusuz, Ozgur Bilici, Keewook Yi, Youn-Joong Jeong, Z. Samet Guloglu
Summary: The plutonic rocks in the Eastern Pontides in NE Turkey have been studied using new geochemical, isotopic and geochronological data. Two different plutons were identified, one formed by partial melting of a depleted mantle and the other formed by partial melting of an enriched mantle metasomatized by slab-derived sediments. These rocks provide insights into the tectonic events during the Middle Jurassic, related to the closure of the Paleotethys oceanic slab.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geology
Ezgi Saglam, Turgut Duzman, Cemre Ay, Aral I. Okay, Gultekin Topuz, Gursel Sunal, Ercan Ozcan, Demir Altiner, Aynur Hakyemez, Jia-Min Wang, Andrew R. C. Kylander-Clark
Summary: During the Late Cretaceous, a 2700 km-long magmatic arc extended from the Lesser Caucasus through the northern margin of the Pontides into ABTS in the Balkans. The arc magmatism started in the Turonian, peaked in the middle Campanian, and became rare after the late Campanian. The magmatism showed calc-alkaline to high-K calc-alkaline composition and subduction geochemical signatures.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Peng Gao, Limei Tang, Ling Chen
Summary: This study investigates the Ross Orogenic Belt in the Transantarctic Mountains of Antarctica. By analyzing the geochemical and geochronological data of the North Victoria Land Granite Harbour Intrusive complex, the impact of early Paleozoic magmatism on continental crust growth through accretionary orogenesis is revealed. The syenite shows characteristics of island-arc granite and was emplaced at approximately 471.8-477.3 Ma, resulting from the partial melting of the lithospheric mantle enriched with subduction slab fluids and subcontinental lithosphere. A tectonic-magmatic model involving alternating phases of extension and contraction in the overriding plate is proposed. The study concludes that the (post-orogenic) magmatism occurred during extension in the overriding plate at around 478-471 Ma.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Abdullah Sar, Sevcan Kurum, Ahmet Feyzi Bingol
Summary: This study investigates the magmatic evolution of the Eastern Pontides orogenic belt in northeastern Turkey using new zircon U-Pb ages, Lu-Hf isotopes, and whole-rock geochemical and Sr-Nd isotopic analyses. The results suggest a heterogeneous magma source, possibly derived from a juvenile lower crust. Additionally, the magmatism in the area is associated with the collision of the Anatolide Taurid Platform with the Pontides.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Yue Li, Feng Yuan, Simon M. Jowitt, Xiangling Li, Taofa Zhou, Fangyue Wang, Yufeng Deng
Summary: Determining the precise timing of mineralization is crucial for understanding geological events and processes. Existing methods for absolute dating of mineralizing systems have limitations. This study presents a new in situ analytical approach using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) for scheelite U-Pb dating. The approach is verified using samples from a skarn deposit in eastern China. The new approach is rapid, cost-effective, and can be conducted in situ, allowing for the retention of geological context. It has the potential for various applications in mineralizing systems.
GEOSCIENCE FRONTIERS
(2023)
Article
Geochemistry & Geophysics
Deepak Kumar, N. V. Chalapathi Rao, Aparajita Tripathi, B. Belyatsky, Priyesh Prabhat, Waliur Rahaman, M. Satyanarayanan
Summary: This study provides petrological, geochronological, and isotopic data for a lamprophyre dyke in the Central Indian Tectonic Zone, India, revealing its emplacement age, rock source, and geodynamic context. The findings are significant for unraveling global-scale geodynamic processes.
Article
Geochemistry & Geophysics
Heriberto Rochin-Banaga, Donald W. Davis
Summary: This study examines the feasibility of using LA-ICPMS for U-Pb dating of vertebrate and invertebrate apatite fossils. The results suggest that the U-Pb system in shark teeth remains closed until the present but some teeth show anomalous ages possibly due to lead remobilization. Overall, LA-ICPMS allows for more precise absolute dating of fossils.
Article
Geology
Ke Chen, Yong-jun Shao, Jun-ke Zhang, Yu Zhang, Hua-jie Tan, Yu-ce Zhang, Zhong-fa Liu
Summary: This study describes the diverse textures of garnet at the Dongguashan Cu-Au deposit and presents new U-Pb age and chemical data, revealing the formation of garnet from hydrothermal replacement.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Jingxin Hong, Hongyu Zhang, Degao Zhai, Dengfeng Li, Yulong Zhang, Jiajun Liu
Summary: The Haobugao skarn Zn-Pb ore deposit is located in the Cu-Mo-Ag-Au-Pb-Zn-Fe metallogenic province in northeastern China, formed during the early Cretaceous. The deposit contains two types of garnet reflecting different origins, possibly influenced by oxidized or reduced conditions, associated with the geological tectonic setting of the early Cretaceous.
ORE GEOLOGY REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Zhongwu Lan
Summary: Authigenic xenotime and monazite are common in siliciclastic sedimentary rocks and can be used to determine the depositional age. Their small size and complex chemical compositions require advanced imaging and dating techniques. Integrated petrographic and geochemical studies can help distinguish their different sources.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geology
Hongjun Chen, Xiaoming Sun, Dengfeng Li, Rong Yin, Zida Tong, Zhongwei Wu, Yu Fu, Qiaofen Liu, Xian Chen, Jianzhou Yi, Xueguo Deng
Summary: This study investigates the apatite in the Nianzha gold deposit and identifies two types of apatite, indicating different formation processes. The dating of hydrothermal apatite provides valuable information on the timing of orogenic gold mineralization events in the region.
ORE GEOLOGY REVIEWS
(2022)
Review
Geology
Y. Yilmaz, E. Yigitbas
Summary: The Eastern Pontides are the northeasternmost component of the Anatolian orogen and are closely associated with the evolution of the Ankara-Erzincan Suture. It records the geological events from the opening to the elimination of the surrounding oceans. The Pontides experienced four collisional events throughout its development, including forearc-arc collision and continent-arc collision.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geology
Qing-fei Sun, Ke-yong Wang, Feng-yue Sun, Chun-kit Lai, Miao Zhang, Chen-guang Zhao, Li-xue Sun
Summary: The southern Great Xing'an Range in NE China is a significant polymetallic mineral province with superimposing mineralization at the Panjiaduan deposit, occurring in the Late Triassic and Early Cretaceous, influenced by post-collision tectonics and extensional settings after tectonic events in the region.
ORE GEOLOGY REVIEWS
(2021)
Article
Geochemistry & Geophysics
Daniel Adelino da Silva, Guilherme Loriato Potratz, Mauro Cesar Geraldes
Summary: The Soarinho Alkaline Intrusion in southeastern Brazil is part of the Serra do Mar Igneous Province and consists of various rock types. It is younger than its neighboring intrusions, Rio Bonito and Tangua. Geochemical and geochronological analyses reveal similarities and differences between the three intrusions, suggesting a potential enriched mantle source for Soarinho.
Article
Geosciences, Multidisciplinary
Abdullah Kaygusuz, Mehmet Arslan, Irfan Temizel, Cem Yucel, Emre Aydincakir
Summary: This study provides new insights into the igneous activity and geodynamic evolution of the Late Cretaceous era in the north part of the Eastern Pontides Orogenic Belt (EPOB) through the analysis of mineralogy, petrology, geochronology, and isotope geochemistry of the Arpakoy and Oyman granitoids. The results indicate specific petrological characteristics and emplacement depths of these granitoids, with the parental magma originating from an enriched lithospheric mantle.
JOURNAL OF AFRICAN EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Mehmet Arslan, Irfan Temizel, Lukas Ackerman, Cem Yucel, Emel Abdioglu Yazar
Summary: The Cenozoic volcanic rocks from the Eastern Pontides Orogenic Belt in NE Turkey exhibit a wide range of variation in highly siderophile element (HSE) contents and Os isotope compositions, which are related to their mantle sources and magma evolution. Crustal assimilation played an important role in the evolution of the Eocene and Miocene volcanic rocks.
Article
Geosciences, Multidisciplinary
Cafer Ozkul, Irfan Temizel, Muzaffer Ozburan, Mehmet Arslan, Yasar Kibici
Summary: The first geochronological and geochemical data of the Kutahya area volcanics in western Turkey were presented to study mantle sources and magmatic processes. The results suggest that these volcanics underwent a series of complex magmatic evolution processes.
JOURNAL OF AFRICAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Irfan Temizel, Mehmet Arslan, Emel Abdioglu Yazar, Zafer Aslan, Abdullah Kaygusuz, Tugba Baki Eraydin
Summary: The study of mafic intrusions in the Eastern Pontides Orogenic Belt in NE Turkey reveals the presence of rare tholeiitic gabbro stocks with varying compositions, indicating a connection to continental or oceanic crust.
Article
Geology
Cem Yucel, Emre Aydincakir, Abdullah Kaygusuz, Mehmet Arslan, Keewook Yi, Youn-Joong Jeong, Derya Cicerali
Summary: The Late Cretaceous magmatic activity in the Eastern Pontides Orogenic Belt of NE Turkey was characterized by the intrusion of I-type and A-type plutons. A-type plutons from the Sebinkarahisar area, with ages of approximately 77.36 +/- 0.96 Ma, display characteristics of enrichment in K2O and Na2O, Ga, Zr, and strong negative Eu anomalies. These plutons were formed in an extensional tectonic environment and were sourced from a metasomatized lithospheric mantle and juvenile crust.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Mehmet Arslan, Irfan Temizel
Summary: The post-collisional Cenozoic basic volcanic rocks in NE Turkey show temporal variations in whole-rock lithophile element and highly siderophile element (HSE) systematics that are mainly associated with the nature of sub-continental lithospheric mantle (SCLM) sources and parental melt generation. The lithophile element and HSE geochemical data reveal the heterogeneity of the SCLM source, the influence of previous subduction and post-collisional interactions, and the impact of crustal contamination on the volcanic rocks.
Article
Geology
Irfan Temizel, Mehmet Arslan
Summary: Through the study of monzonitic plutons in northeastern Turkey, we found that they were formed during the Middle Eocene and belong to I-type shoshonitic magmas. They were mainly derived from the sub-continental lithospheric mantle and crustal components, and underwent fractional crystallization in the crustal levels.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Mehmet Arslan, Irfan Temizel, Emel Abdioglu Yazar, Bahrican Ar, Cem Yucel
Summary: The highly siderophile element and Os isotope systematics of basalts have recently received significant attention in petrological studies due to their potential in constraining magma generation and evolution processes. The data obtained from modern techniques are used to analyze the HSE contents and ratios in basalts, which provide opportunities for geochemical modeling. The HSE contents and Pd-PGE/Ir-PGE ratios are important indicators for various geological processes in the origin and evolution of mantle-derived magmas.
BULLETIN OF THE MINERAL RESEARCH AND EXPLORATION
(2022)
Article
Geosciences, Multidisciplinary
Emel Abdioglu Yazar, Mehmet Arslan, Cahit Helvaci, Ibrahim Gundogan, Irfan Temizel, Didem Aydincakir
Summary: The Askale sub-basin hosts Early Miocene evaporites with high contents of gypsum and anhydrite, showing characteristics of enrichment in light rare earth elements. Petrochemical and isotopic data indicate that these evaporites developed in subtropical conditions through multiple marine transgressions onto a shallow platform or lagoonal environment.
BULLETIN OF THE MINERAL RESEARCH AND EXPLORATION
(2021)
Review
Geosciences, Multidisciplinary
Fuquan Yang, Xinxia Geng, Zhixin Zhang, Guoren Liu, Hanqing Zhang
Summary: Northern Xinjiang in China is an important part of the Central Asian Orogenic Belt, characterized by multiple episodes and types of mineralization. Cu and Au deposits are mostly found in Altay, Junggar, and Tianshan, with minor occurrences in Beishan. The most common types of Cu-Au deposits are volcanogenic and porphyry deposits. The formation of Cu-Au deposits can be divided into five mineralization episodes, with the Devonian and Carboniferous being the main periods. These deposits developed in various tectonic settings, including island arc, continental arc, collision, and postcollisional extensional tectonics.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Jiang Zhu, Dan-yang Liu, Chao Chen, Song Chen, Yuan-bing Zou, Leonid Danyushevsky, Jing-meng Huang, Xiang-wei Tang
Summary: Numerous lode gold and silver deposits have been discovered in orogenic belts in China. This study focuses on the formation and fluid evolutions of the super-large Yingdongpo gold and giant Poshan silver deposits in the Tongbai-Dabie orogen. The results suggest that both deposits were formed concurrently with Early Cretaceous granitic magmatism and the ore-forming fluids were primarily of magmatic origin with meteoric water inputting. The gold mineralization is related to a change in the physicochemical properties of the fluids, while the silver mineralization is favored by progressive deposition of sulfides in a slowly cooling hydrothermal system.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Arun Bhadran, B. P. Duarah, Drishya Girishbai, Mohammad Atif Raza, Avi Mero, Sandeep Lahon, A. L. Achu, Girish Gopinath
Summary: The Brahmaputra foreland basin, known for its dynamic tectonism and sediment load, exhibits a variety of seismically generated soft sediment deformation structures (SSDS) such as clastic dikes, sand sills, and micro-faults. These structures, influenced by multiple strong seismic events, are characterized by their dimensions, intrusion angles, cross-cutting relations, wall shattering, and age. The study suggests that a significant earthquake with high intensity and magnitude might have caused liquefaction features in the area. The findings highlight the importance of studying SSDS in tectonically active regions with limited surface ruptures and dense alluvial cover.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Huan Wang, Lirong Dou, Xingyang Zhang, Jiquan Yin, Beiwei Luo, Haigang Duan, Peiguang Yang, Yifan Song
Summary: Quantitative analysis of sediment composition and microfacies helped identify changes in facies belts in the Cretaceous Mishrif Formation. The study demonstrated the importance of carbonate microfacies quantification and its implications for paleogeographic research.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Boran Wang, Zhilong Huang, Dongsheng Xiao, Haiyue Yu, Wenren Zeng, Xin Wang, Tong Qu, Zhiyuan Li, Yizhuo Yang
Summary: By systematically analyzing the source rocks of the Sangonghe Formation in the Taibei Sag, NW China, and using kerogen kinetics modeling, this study reveals the influence of geological conditions on hydrocarbon generation and expulsion. The source rocks in different environments show distinct geochemical characteristics and hydrocarbon generation potential.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Haiying Yang, Zhifang Zhao, Haifeng Fan, Min Zeng, Jiafei Xiao, Xiqiang Liu, Shengwei Wu, Jiangqin Chao, Yong Xia
Summary: This paper investigates the REE enrichment and the role of Fe/Mn (oxyhydr)oxides in marine phosphorites from the early Cambrian period in South China. The study reveals that Fe/Mn (oxyhydr)oxides play a crucial role in REE enrichment and are controlled by Fe-redox pumping.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Qing Li, Hongbin Wang, Feng Cai, Di Luo, Fanxing Kong, Ang Li, Xiting Liu
Summary: The elemental and isotopic compositions and abundance of carbonates in marine sediments are used to reconstruct ancient climate and ocean conditions. This study analyzed sediment samples from the Okinawa Trough to examine the relationship between carbonates' compositions and methane seepage and sea-level changes. The results indicate that both biogenic and authigenic carbonates are important factors in understanding paleoclimate and paleoceanography.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Maryam Akbarzadeh Aghdam, Abdolreza Ghods, Farhad Sobouti, Khalil Motaghi, Keith Priestley, Mohammad Enayat
Summary: The Makran subduction zone is difficult to monitor due to limited seismic activity, but a temporary seismic network was installed to investigate the relationship between different regions and detect seismicity. The observed seismicity suggests the presence of structural boundaries and seismically inactive areas.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Zhen-Yu Wang, Hong-Rui Fan, Hai-Dong She, Kui-Feng Yang
Summary: This study conducted detailed geochemical, geochronological and isotopic analyses on the Songxian syenite in the Qinling Orogen. The results revealed the magma sources, petrogenesis and geodynamic implications of this alkaline intrusion. The study suggests that the syenite was formed through multiple stages of magmatism, involving the partial melting of the enriched lithospheric mantle and mixing with melts derived from the lower crust.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Yu Li, Wen-Liang Xu, Xiao-Ming Zhang, Jie Tang
Summary: This study presents new zircon U-Pb-Hf and whole-rock geochemical data for Jurassic intrusive rocks in the Yanbian area of NE China, providing insights into the subduction history of the Paleo-Pacific Plate. The study reveals three stages of Jurassic magmatism in the area, indicating the presence of an active continental margin related to the initial subduction of the Paleo-Pacific Plate beneath the Eurasian continent.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Lina Ai, Shengfa Liu, Shuai Cong, Hui Zhang, Peng Cao, Kaikai Wu, Wenxing Ye, Che Abd Rahim Mohamed, Xuefa Shi
Summary: This study investigates the depositional configurations and sedimentary environments of the Malacca Strait through analyzing grain size characteristics and hydrographic data. The results show that residual sediments are concentrated in the central region, while modern terrigenous sediments are distributed along the coast of Malaysia and the northern region. The sedimentary environments are influenced by seasonal variations and hydrodynamic conditions.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Liang Xiao, Jia-qi Liang, Li-yan Guo, De-shuang Ji, Man Yuan, Xiang-chuan Li, Nan Sun, Zuo-chen Li
Summary: This study investigates the correlation between stable carbon isotopes of plant fossils and CO2 levels in the Jurassic period. The results suggest a weak correlation between the two, indicating caution is needed when using stable carbon isotopes to reconstruct high paleo-CO2 concentrations.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Xuli Yang, Feng Huang, Jifeng Xu, Xijun Liu, Liying Zhang, Zhao Zhang, Benyan Xu, Man Zhang, Yunchuan Zeng, Qian Liu, Mingda Lv
Summary: The extensively developed Early Cretaceous intermediate-felsic rocks in the northern North China Craton provide valuable insights into the nature of Paleo-Pacific subduction and associated geodynamic processes. Geochemical and geochronological analyses of trachyandesites and rhyolites from the eastern Hebei, northern NCC suggest that the trachyandesites likely originated from enriched mafic lower crust and the rhyolites are derived from the trachyandesitic magmas through fractional crystallization. The migration direction change of these rocks is believed to be primarily attributed to slab rollback of the subducting Paleo-Pacific Plate.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Wei Liu, Ping Gao, Xianming Xiao, Yanming Zhao, Yijie Xing, Jinku Li
Summary: The organic-rich shales of the Shuijingtuo Formation in China are an important target for shale gas exploration. The upper section of the formation, primarily consisting of limestone, silty shale, and black shale, has been rarely studied but recently showed promising results for shale gas exploration. Geochemical investigations of the upper section shale deposits revealed that the organic matter enrichment mechanism underwent dynamic changes due to relative sea-level changes and episodic upwelling activities.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Xin Wang, Chen Zhang, Zixin Xue, Qianyou Wang, Zhenxue Jiang, Kun Zhang, Xiangye Kong
Summary: This study analyzed the heterogeneity of gas compositions and the effects of magmatism on gas accumulation in shale gas exploration in the Yangtze plate. The results showed that magmatism caused the development of micro-fractures in shale reservoirs and accelerated the thermal evolution rate of organic matter. The impact of magmatism on shale gas accumulation varied in different regions, either favoring or compromising efficient gas accumulation in shale reservoirs.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
