Review
Geosciences, Multidisciplinary
Hua-Wen Cao, Qiu-Ming Pei, M. Santosh, Guang-Ming Li, Lin-Kui Zhang, Xiang-Fei Zhang, Yun-Hui Zhang, Hao Zou, Zuo-Wen Dai, Bin Lin, Li Tang, Xiao Yu
Summary: This study reviews the geological and isotopic data of Himalayan Cenozoic granitoids to determine their genesis and understand their relationship with crustal evolution and metallogeny. The leucogranites in the Himalayas are derived from partial melting of the crystalline complex and undergo high degree of differentiation and fractional crystallization. The geochemical and isotopic characteristics of these rocks are significant in understanding the tectonic evolution of the Himalayan region.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geology
Xiang-Ying Ye, Bin Li, Xiao-Dong Chen, Jing Lei, An-Huai Lu, Lei Zhao, Xing Li, Dong-Bo Tana, Yilin Xiao
Summary: This study investigates the geochemistry and Li isotopes of the Renli-Chuanziyuan lithium-niobium-tantalum deposit in China's Mufushan batholith, finding that magmatic volatile phase (MVP) exsolution is related to pegmatite formation and MVP migration plays a role in the different Li isotopic compositions of pegmatites. The results suggest that MVP exsolution, migration, and accumulation are key factors in rare metal mineralization.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Ping Shen, Hong-Di Pan, Chang-Hao Li, Hao-Xuan Feng, Lan-Fang He, Ying-Xiong Bai, Yao-Qing Luo, Qing-Yu Suo, Chong Cao
Summary: This study reveals the presence of ore-bearing leucogranites in the Koktokay region of the Chinese Altai, which are associated with a giant Li-Be-Nb-Ta-Cs-Rb-Hf deposit. The leucogranites have similar petrographic, geochemical, and geochronological characteristics as the Koktokay No. 3 pegmatite, indicating a common magmatic source. The findings suggest the existence of a larger, unexposed parental granite at depth.
Article
Multidisciplinary Sciences
Fang Huang, Ruixia Bai, Gengxin Deng, Xiaochi Liu, Xianhua Li
Summary: Himalayan leucogranites are important post-collisional magmatic products in the orogenic belt, with unique barium isotope compositions suggesting the involvement of magmatic fluids and potential contribution to rare metal ore deposits.
Article
Geochemistry & Geophysics
Chaoxi Fan, Cheng Xu, Aiguo Shi, Martin P. Smith, Jindrich Kynicky, Chunwan Wei
Summary: Rare earth elements (REEs + Y) are important in modern industry, especially heavy rare earth elements (HREEs) due to their scarcity. Most global HREE resources are found in granitoid weathering crusts in southern China. The parental granitoids in Chinese HREE deposits are peraluminous, despite the general enrichment of REEs in alkaline rocks. The granitoid complex in Zudong, South China, which contains the largest HREE deposits globally, consists of different rock types with varying REE compositions, distribution patterns, and Nd isotope ratios. These findings shed light on the enrichment process of HREEs in highly fractionated peraluminous granites.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Hilmy E. Moussa, Paul D. Asimow, Mokhles K. Azer, Moustafa A. Abou El Maaty, Adel I. M. Akarish, Nagy N. Yanni, Heba S. Mubarak, M. J. Wilner, Mustafa A. Elsagheer
Summary: The Nuweibi intrusion consists of two co-genetic phases, characterized by peraluminous and low-P features, formed during the final tectono-magmatic stage of ANS development.
Article
Geology
Yongwang Zhang, Yan Liu, Xinxiang Zhu, Markus B. Raschke, Nengping Shen
Summary: The study reveals that the Pankou and Pukouling granites in the Xuebaoding area of western China are enriched in W-Sn-Be minerals and exhibit highly fractionated S-type characteristics, derived from partial melting of metasedimentary rocks, which are closely related to the formation of the ore deposit.
ORE GEOLOGY REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Fangyang Hu, Xiaochi Liu, Shaoxiong He, Jiamin Wang, Fuyuan Wu
Summary: This paper presents the discovery of pollucite-lepidolite-albite granite (PLAG) in the Himalayan leucogranite belt, which is the first occurrence of pollucite in the Himalayan orogenic belt. The rock contains rare-metal minerals, particularly cesium and lithium. The formation age indicates that PLAG and the tourmaline-bearing two-mica granite may have formed within the same magmatic system. The presence of pollucite suggests significant magmatic fractionation. The discovery highlights the prospecting potential of the Himalayan leucogranite belt for cesium and rubidium resources.
SCIENCE CHINA-EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Xiao-Chi Liu, Fu-Yuan Wu, Matthew J. Kohn, Zhi-Chao Liu, Wei-Qiang Ji, Jia-Min Wang, Lei Yang, Shao-Xiong He
Summary: This study investigates the potential petrogenetic connection between two-mica granite and subvolcanic rhyolite porphyry in the Lhunze region of southeast Tibet using petrology, geochronology, and geochemistry. The results suggest that both rocks may originate from a similar melt, but the porphyry has distinct compositional and geochemical characteristics compared to the two-mica granite, indicating different evolutionary processes. Additionally, the study suggests that the porphyry likely assimilated more ancient country rocks during its evolution.
Article
Geology
Wu FuYuan, Wang RuCheng, Liu XiaoChi, Xie Lie
Summary: The rare-metal mineralization in the Himalayas has attracted attention with the discovery of beryllium, niobium, and tantalum-bearing deposits, although progress in lithium mineral resource in the area has been limited. Future research should focus on petrology and geochemistry of leucogranites, metamorphic aureole in the northern Himalayan domes, and understanding the relationship between STDS movement and emplacement of leucogranites for potential mineral discoveries. Joint research efforts are recommended for a breakthrough in lithium resources.
ACTA PETROLOGICA SINICA
(2021)
Article
Geology
Yaoqing Luo, Ping Shen, Chong Cao, Haoxuan Feng, Changhao Li, Yingxiong Bai, Qingyu Suo
Summary: The Shangkelan granite-pegmatite in the Chinese Altai is known for its zonation and tungsten mineralization, but the genetic relationship and mineralization mechanism have been unclear. This study uses U-Pb dating, Nd isotopic composition, and chemical analysis to reveal that the granite and pegmatite have the same age and similar isotopic compositions. The findings suggest that the granite is parental to the pegmatite and they were formed through fractional crystallization from a common magma source.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Yanjiao Chen, Bin Chen, Xiaoxia Duan, He Sun
Summary: The study challenges the traditional model that considers late-stage granite as a result of differentiation of main-phase granite. Instead, it suggests that the late-stage two-mica granite formed under more water-deficient and reduced conditions compared to the early-stage biotite granite.
Article
Geochemistry & Geophysics
Qingshang Shi, Yongsheng He, Zhidan Zhao, Dong Liu, Nigel Harris, Di-Cheng Zhu
Summary: The study presents Fe isotopic data of Himalayan leucogranites to investigate their petrogenesis, suggesting that they are likely formed from partial melting of the crust rather than high degree of fractional crystallization. The elevated Fe isotopic values in most leucogranites compared to the supposed source rocks indicate possible Fe isotope fractionation during crustal anatexis. This study provides insights into the conditions of crustal anatexis and the thermal and tectonic evolution of the Himalayan orogen.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Review
Geology
Shuhao Zhang
Summary: This study provides a comprehensive analysis of the Cenozoic Himalayan leucogranites (HLs) using geochronological and geochemical data. The HLs are highly fractionated and enriched in rare-metal elements, indicating their importance for rare-metal mineralization. The study also reveals the complexity of the magma sources and melting mechanisms for the HLs. Additionally, the study proposes a five-stage model for the emplacement of the HLs and identifies the Lesser Himalayan Sequence as a significant source for HLs formation.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geology
Vandi Dlama Kamaunji, Lian-Xun Wang, Wei Chen, Musa Bala Girei, Hafizullah Abba Ahmed, Yu-Xiang Zhu, Victor Ikechukwu Vincent, Liang Cao
Summary: The Ririwai anorogenic alkaline complex contains extensive rare metal mineralization, and the A-type granites within the complex represent highly fractionated products of enriched mantle-derived magmas. Subsequent fractional crystallization and hydrothermal processes have further enriched the economic rare metal mineralization in the granites.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Dan Wang, Fu-Lai Liu, Richard Palin, Jia-Min Wang, Mathias Wo, Lei Ji, Fang Wang
Summary: The study investigates the importance of high-grade metamorphic rocks and crustal melts in the growth and differentiation of continental crust, focusing on their role in the evolution of the continental arcs of the Neo-Tethys ocean. Through research conducted in the Gaoligong shear zone in Yunnan, China, Late Cretaceous metamorphism and crustal anatexis were identified for the first time, shedding light on the processes that shaped the active continental margin of the Neo-Tethys ocean.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Feng Cong, De-Feng He, Wei-Qiang Ji, Liang Huang, Bo Xiong, Shao-Hua Zhang, Xiao-Ming Huang
Summary: This study investigates the relationships and petrogenesis of the Triassic Caojian rhyolites and granites in the Changning-Menglian Palaeo-Tethys orogenic belt. It uses zircon U-Pb geochronology, trace element analyses, and isotope data to understand their origins. The results indicate that the Caojian rhyolites have A-type affinity, while the Caojian granites represent the rejuvenation of crystal mush. The study suggests that lithospheric delamination and upwelling of the asthenosphere played a role in the magmatic evolution during the Mid- to Late Triassic.
GEOLOGICAL MAGAZINE
(2022)
Article
Geology
Xu Chu, Ozan Akca, Fred Gaidies, Ivano Gennaro, Weiqiang Ji
Summary: The thermal histories of Himalayan leucogranites play a critical role in understanding the post-collisional geodynamics of the Himalayas. The study focuses on the Ramba Dome, which is located at the intersection of the Tethyan Himalayan leucogranite belt and the Yadong-Gulu Rift, and provides important insights into the thermal history of the aureole and the cessation of leucogranite magmatism.
JOURNAL OF METAMORPHIC GEOLOGY
(2023)
Review
Geosciences, Multidisciplinary
Jiamin Wang, Fuyuan Wu, Jinjiang Zhang, Gautam Khanal, Lei Yang
Summary: This paper introduces how crustal thickening controls the growth of the Himalaya by summarizing the P-T-t evolution of the Himalayan metamorphic core. The study divides the Himalayan orogeny into three stages and explores the relationship between geological processes and the elevation rise of the Himalaya. Future research should focus on extreme metamorphism, major collisional events, contact metamorphism, and rare metal mineralization in the Himalayas.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2022)
Article
Geochemistry & Geophysics
Xiao-Chi Liu, Fu-Yuan Wu, Matthew J. Kohn, Zhi-Chao Liu, Wei-Qiang Ji, Jia-Min Wang, Lei Yang, Shao-Xiong He
Summary: This study investigates the potential petrogenetic connection between two-mica granite and subvolcanic rhyolite porphyry in the Lhunze region of southeast Tibet using petrology, geochronology, and geochemistry. The results suggest that both rocks may originate from a similar melt, but the porphyry has distinct compositional and geochemical characteristics compared to the two-mica granite, indicating different evolutionary processes. Additionally, the study suggests that the porphyry likely assimilated more ancient country rocks during its evolution.
Article
Geochemistry & Geophysics
Abdolnaser Fazlnia, Kwan-Nang Pang, Wei-Qiang Ji
Summary: The Cretaceous Gharuchah-Sofla intrusion in Iran is a composite batholith consisting of various mafic to felsic rocks. The age and relationships between different rock types in the intrusion were unknown. Through detailed studies, it was found that the intrusion was dominated by Early Cretaceous and Ediacaran magmatic rocks, characterized by sub-alkaline compositions. The formation of these rocks was likely associated with Cadomian basement melting and fractional crystallization processes.
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
Geochemistry & Geophysics
Shao-Hua Zhang, Wei-Qiang Ji, Hou-Bin Chen, Linda A. Kirstein, Fu-Yuan Wu
Summary: The potential impact of the Linzizong volcanism in southern Tibet on the climate and environment is still uncertain. This study presents systematic findings from fieldwork and analysis of volcanic rocks, including age dating, indicating a supereruption event in the Early Eocene that may have influenced the release of a large amount of CO2 and the climate during this period.
Review
Geosciences, Multidisciplinary
Liang Zhao, Zhengtang Guo, Huaiyu Yuan, Xinxin Wang, Hao Shen, Jianfeng Yang, Baolu Sun, Ning Tan, Hui Zhang, Yonggang Liu, Yang Li, Jiamin Wang, Weiqiang Ji, Rixiang Zhu
Summary: Plate tectonics play a vital role in regulating atmospheric CO2 concentration over geological timescales. Current research on tectonic CO2 dynamics requires the development of models that include four modules: simulating carbon processes, calculating CO2 fluxes, reconstructing carbon cycling within tectonic scenarios, and comparing with atmospheric CO2 history data. The primary technical challenge lies in simulating the complex carbon dynamics across different scales in time and space.
SCIENCE CHINA-EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Zhi-Chao Liu, Fu-Yuan Wu, Wei-Qiang Ji, Xiao-Chi Liu, Jian-Gang Wang
Summary: This study focuses on the geochemical characteristics of leucogranites and their country rocks in the Yadong area of southern Tibet. The research reveals the presence of multiple age populations of monazite and different Nd isotope ratios, indicating a complex history of magmatic processes. The study also identifies abundant inherited monazites in the leucogranites, which share close affinities with the country rocks, suggesting a major influence of country-rock contamination. Additionally, the study highlights the different preservation of xenocrystal monazites and the role of magmatic differentiation in the formation of the Yadong leucogranites.
Article
Geochemistry & Geophysics
Abdolnaser Fazlnia, Kwan-Nang Pang, Wei-Qiang Ji, Mohammad Pirouei
Summary: The Middle Eocene was a significant period of magmatic activity in the Urumieh-Dokhtar magmatic arc in Iran. However, the trigger and mechanism of magma generation during this time are not well understood. In this study, silicic ignimbrites from the northwestern part of the arc were analyzed for their age, composition, and isotopic ratios. The results indicate that the rocks originated from both crustal melts and mixed products with a depleted mantle-like component. The involvement of crustal melts is necessary to explain the geochemical variability observed in igneous rocks during the Iranian arc flare-up.
Article
Geology
Chen HouBin, Ji WeiQiang, Zhang ShaoHua
Summary: This paper provides a comprehensive review of the principle, development history, and research basis of diffusion chronometry, with emphasis on its application in defining the time scales of volcanic eruption processes. It also discusses the potential problems in applying diffusion chronometry.
ACTA PETROLOGICA SINICA
(2022)
Article
Geology
Ji WeiQiang, Wu FuYuan
Summary: This paper provides a brief overview of various aspects of research on volatiles, including the origin of volatiles on Earth, the formation and evolution of the atmosphere and ocean, the release of volatiles and their effects on the climate and environment, and the cycling of volatiles in subduction zone. It is expected to enhance understanding of volatile research content and promote the development of volatile research in China.
ACTA PETROLOGICA SINICA
(2022)
Article
Geology
Zhang ShaoHua, Ji WeiQiang, Chen HouBin
Summary: This paper summarizes the research progress on the driving mechanism of the Early Eocene Climatic Optimum (EECO), including various viewpoints and factors, and estimates the carbon emissions of the Linzizong volcanic rocks in the southern Tibetan Plateau and discusses their potential contribution to the EECO event.
ACTA PETROLOGICA SINICA
(2022)
Article
Geology
Feng Cong, Fu-Yuan Wu, Wen-Chang Li, De-Feng He, Zai-Bo Sun, Xiao-Ming Huang, Zhi-Zhong Hu, Han Zhao
Summary: The Triassic Lincang granites in the southeastern Tibetan Plateau are the largest peraluminous granitic batholith in the Changning-Menglian Paleo-Tethys orogenic belt. The Late Triassic Mengsong pluton, located in the southernmost part of the Lincang batholith, consists of strongly peraluminous two-mica monzogranites. Despite being peraluminous granites, the Mengsong two-mica monzogranites differ significantly from the biotite monzogranites of the Lincang batholith in terms of dimensions and geochemical characteristics. Petrogenetic and isotopic data suggest that the Mengsong two-mica monzogranites and the Lincang biotite monzogranites are coeval and derived from partial melting of the lower crust.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geochemistry & Geophysics
Huichuan Liu, Alan R. Hastie, Chiara Maria Petrone
Summary: This study conducted isotope analyses on two ocean island basalt (OIB)-associated enriched mafic intrusions in the Yunnan-Burma region, and found that these rocks may have originated from the subduction recycling of marine sediments and altered oceanic crust.
Article
Geochemistry & Geophysics
L. Notini, M. Scambelluri, A. Tommasi, A. Zanetti, F. Ferri, A. Rodriguez-Vargas, E. Rampone
Summary: This study provides important petrologic information on the mantle wedge above an active subduction zone in Southern Colombia. The researchers analyzed a unique suite of rock samples and found evidence of hydration, metasomatism, and partial melting in the mantle wedge. They also observed variations in lithotypes, textures, and mineral abundance, indicating different interactions with melts and fluids. This study sheds light on the complex petrological processes occurring in the mantle wedge and contributes to our understanding of subduction zone dynamics.
Article
Geochemistry & Geophysics
Sourav Bhattacharjee, Aniket Chakrabarty, Roger H. Mitchell, Suresh Chandra Patel, Evgeniy N. Kozlov, Ekaterina N. Fomina, Monojit Dey, Supratim Pal
Summary: The Hogenakkal complex in India consists of silicate-rich and silicate-poor carbonatites and clinopyroxenites. The formation of carbonatite is influenced by silicate minerals. The carbohydrothermal mineralization in the carbonatites is induced by magma-derived fluids and interactions with the surrounding rocks.
Article
Geochemistry & Geophysics
Jia-Min Wang, Kyle Patrick Larson, Jin-Jiang Zhang, Liang Zhao, Fu-Yuan Wu
Summary: The role of collisional belts in the global carbon budget is controversial. This study reveals a previously unrecognized carbon source in the collisional orogen of the Himalayas, where metamorphism of carbonate-bearing rocks in the hanging wall resulted in significant CO2 degassing.
Article
Geochemistry & Geophysics
Joseph Martial Akame, Elson Paiva Oliveira, Vinciane Debaille, Marc Poujol, Bernhard Schulz, Dieudonnee Bisso, Fabien Humbert, Serge Parfait Koah Na Lebogo, Philmont Zo'o Zame
Summary: Archean granitoids play key roles in the crustal evolution and can provide important insights into early geologic processes.
Article
Geochemistry & Geophysics
Xiguang Huang, Jun He, Jingxin Zhao, Jingzhao Dou, Weiyong Li, Aimin Hu, Ge Liu, Yiru Ji, Fukun Chen, Shuangqing Li
Summary: This study investigates the zircon ages and whole-rock geochemical data of Late Paleozoic magmatic rocks in the Western Yunnan Tethyan belt to identify the origin and mechanism of mantle melting. The results suggest that these magmatic rocks may originate from different mantle domains that were metasomatized by slab-derived fluids and sediment-derived melts.