Article
Geosciences, Multidisciplinary
Ludmila Maria Fonseca Teixeira, Juliana Troch, Julien Allaz, Olivier Bachmann
Summary: Fluid exsolution in magmas is an important magmatic-hydrothermal transition process, and studying the temperature evolution and mineral structures in magmas and pegmatites can reveal this transition.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geology
Julin Zhang, Cin-Ty A. Lee
Summary: The Archaean orbicular granitoids from western Australia represent slowly quenched blobs of hot dioritic to tonalitic liquids injected into a cooler granitic magma. The oscillatory bands in the orbicules are mainly influenced by transport-limited crystallization, with rapid growth rates possibly facilitated by fluids and dynamic conditions.
INTERNATIONAL GEOLOGY REVIEW
(2021)
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
Geochemistry & Geophysics
David London
Summary: This study investigated the cores of Macusani green obsidian pebbles from Peru and found that the crystallinity of the products varied despite being subjected to subliquidus temperatures for thousands of hours. The mineral assemblages along the length of the cores were also found to vary, but not in relation to the thermal gradients. Chemical gradients in the glasses were observed, including sharp boundary layer pile-up of certain elements near the crystallization fronts. The study also revealed the temperature recorded by feldspars and the solvus on the alkali feldspar join for the first time.
AMERICAN MINERALOGIST
(2023)
Article
Environmental Sciences
Jeong Hwang, Sung Won Kim
Summary: Cheongwon in South Korea is known for its high concentrations of uranium and radon in the granite aquifer. This study examines a new uranium-host mineral to determine the source of uranium in the aquifer and discusses its implications near groundwater monitoring wells. Analyzing the mineral's chemistry and texture using advanced methods revealed that metamict uranopolycrase could be an important host mineral for interpreting the availability of uranium and radon supplies in the area.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Multidisciplinary Sciences
Rahmat Nawi Siregar, Kurnia Setiawan Widana, Sismanto
Summary: Radiogenic heat production and abundance of heat-producing elements were analyzed in I-type and S-type granite rocks on Bangka Island. The study found that I-type granite has higher radiogenic heat production than S-type granite, and the Th/U ratio can be used to classify the tectonic type of the granite.
KUWAIT JOURNAL OF SCIENCE
(2022)
Article
Mineralogy
Marcos Y. Voutsinos, Jillian F. Banfield, John W. Moreau
Summary: Rare earth elements are essential commodities for technological applications, with important roles in low-abundance minerals and global carbon cycling. The extent of migration of certain lanthanides and phosphorus during weathering varies with mineralogy, highlighting the role of mineralogy in constraining lanthanide availability.
MINERALOGICAL MAGAZINE
(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
Geology
Gao JingGang, Liang Ting, Feng YongGang, Huang Fan, Wang DengHong, San JinZhu, Ding JianGang, Cen JuBiao
Summary: In the Halong region of the Chinese Altay Orogen in Xinjiang, several large-sized granitic plutons and numerous pegmatites are found, with different ages and characteristics. The granites and pegmatites have complex diagenesis and are closely related. The source regions for the granites and pegmatites vary, leading to the diversity of mineralization in the pegmatites.
ACTA PETROLOGICA SINICA
(2023)
Article
Geochemistry & Geophysics
Talifeng Biedilihan, Nijiati Abuduxun, Peng Huang, Jingmin Gan, Yilidan'na Talati
Summary: Late Cryogenian-Ediacaran magmatism in the Tarim Craton is controversial but newly identified granites provide evidence for their formation in a syn-subduction extensional setting at a high-temperature gradient. These granites highlight an upper-plate extension in the northern periphery of the Rodinia supercontinent.
Article
Geosciences, Multidisciplinary
Vimoltip Singtuen, Burapha Phajuy, Kittisak Wichaiya
Summary: The study focuses on the Tak Batholith in the western part of Thailand's eastern granitoid belt. Petrographical, mineralogical, and geochemical analyses were conducted on rock samples collected from the eastern part of the Tak Batholith. The results showed that the granitic rocks in this area can be classified as medium-grained granodiorite and granodioritic dike. The geochemical data indicate that these rocks are I-type metaluminous granodiorite, which formed from the high K calc-alkaline magma melted from the mafic crust. The findings shed light on the geochemical characteristics and occurrences of granitoid rocks in the area.
Review
Geosciences, Multidisciplinary
Roberto F. Weinberg, Ron H. Vernon, Harro Schmeling
Summary: This study explores the behavior of granitic mushes to understand their role in compositional variation of granitic rocks. Mushes, defined as solids with interstitial melt, can be invaded by extraneous melts and react with the crystalline framework, which is crucial in magma mixing and country rock assimilation processes. The inherent physical weakness of mushes makes them prone to disaggregation and liquefaction, ultimately affecting the evolution and geochemical signatures of magmas.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Xing Cui, Min Sun, Guochun Zhao
Summary: The study identifies the presence of peralkaline granites, aluminous A-type granites, and Xibodu granites in the southern Chinese Altai region, each with distinct characteristics in terms of formation period and petrogenesis.
Article
Geology
Ji-Biao Zhang, Xiao-Zhong Ding, Yan-Xue Liu
Summary: The new SHRIMP zircon U-Pb dating results of late Mesoproterozoic to early Neoproterozoic magmatic rocks in the Yangtze Block reveal the emplacement ages and characteristics of Luonie granodiorites and Gonghe granites, indicating different tectonic settings for their formation. Luonie granodiorites were likely formed in an intra-plate rifting environment, while Gonghe granites were associated with an arc-setting, suggesting a tectonic transition in the region during the early Neoproterozoic.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geology
Jiang PengFei, Li Peng, Li JianKang, He XueMei, Shi GuangHai, Huang XiaoQiang, Lin Yue, Yin Jin
Summary: This study conducted research on the garnets in granite and pegmatite in the Mufushan area using EPMA and LA-ICP-MS, and found that the area has great potential for rare metal mineralization. The Mn and HREE content of garnets are related to the magnetic evolution and mineralization stages.
ACTA PETROLOGICA SINICA
(2023)