Oxygen isotope study of metamorphic and granitic rocks of the Yanai district in the Ryoke belt, Japan

1975 ◽  
Vol 52 (2) ◽  
pp. 107-120 ◽  
Author(s):  
Hiroji Honma ◽  
Hitoshi Sakai
Keyword(s):  
Oxygen Isotope ◽  
Granitic Rocks ◽  
Isotope Study

scholarly journals Ore Genesis of the Takatori Tungsten–Quartz Vein Deposit, Japan: Chemical and Isotopic Evidence

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 765
Author(s):  
Yuichi Morishita ◽  
Yoshiro Nishio
Keyword(s):  
Oxygen Isotope ◽  
Early Stage ◽  
Isotope Ratios ◽  
Equilibrium Temperature ◽  
Granitic Rocks ◽  
Granitic Magma ◽  
Lithium Isotope ◽  
Vein Deposit ◽  
Pressure Independent ◽  
Isotope Equilibrium

The Takatori hypothermal tin–tungsten vein deposit is composed of wolframite-bearing quartz veins with minor cassiterite, chalcopyrite, pyrite, and lithium-bearing muscovite and sericite. Several wolframite rims show replacement textures, which are assumed to form by iron replacement with manganese postdating the wolframite precipitation. Lithium isotope ratios (δ7Li) of Li-bearing muscovite from the Takatori veins range from −3.1‰ to −2.1‰, and such Li-bearing muscovites are proven to occur at the early stage of mineralization. Fine-grained sericite with lower Li content shows relatively higher δ7Li values, and might have precipitated after the main ore forming event. The maximum oxygen isotope equilibrium temperature of quartz–muscovite pairs is 460 °C, and it is inferred that the fluids might be in equilibrium with ilmenite series granitic rocks. Oxygen isotope ratios (δ18O) of the Takatori ore-forming fluid range from +10‰ to +8‰. The δ18O values of the fluid decreased with decreasing temperature probably because the fluid was mixed with surrounding pore water and meteoric water. The formation pressure for the Takatori deposit is calculated to be 160 MPa on the basis of the difference between the pressure-independent oxygen isotope equilibrium temperature and pressure-dependent homogenization fluid inclusions temperature. The ore-formation depth is calculated to be around 6 km. These lines of evidence suggest that a granitic magma beneath the deposit played a crucial role in the Takatori deposit formation.

Short-term impacts of forest clear-cut on P accessibility in soil microaggregates: An oxygen isotope study

Geoderma ◽  
2018 ◽  
Vol 315 ◽  
pp. 59-64 ◽  
Author(s):  
Nina Siebers ◽  
Sara L. Bauke ◽  
Federica Tamburini ◽  
Wulf Amelung
Keyword(s):  
Oxygen Isotope ◽  
Short Term ◽  
Clear Cut ◽  
Isotope Study

Oxygen Isotope Study of Magnetite from Chengchao Iron Deposit, Southeastern Hubei Province

2014 ◽  
Vol 88 (s2) ◽  
pp. 95-96 ◽  
Author(s):  
Wei LI ◽  
Guiqing XIE ◽  
Qiaoqiao ZHU ◽  
Yingxin SONG ◽  
Zhiyuan ZHANG
Keyword(s):  
Oxygen Isotope ◽  
Hubei Province ◽  
Iron Deposit ◽  
Isotope Study

The Gauls experienced the Roman Warm Period: Oxygen isotope study of the Gallic site of Thézy-Glimont, Picardie, France

2020 ◽  
Vol 34 ◽  
pp. 102595
Author(s):  
Thibault Clauzel ◽  
Pascale Richardin ◽  
Jannick Ricard ◽  
Yves Le Béchennec ◽  
Romain Amiot ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Warm Period ◽  
Isotope Study

scholarly journals A comprehensive sulfur and oxygen isotope study of sulfur cycling in a shallow, hyper-euxinic meromictic lake

2016 ◽  
Vol 189 ◽  
pp. 1-23 ◽  
Author(s):  
William P. Gilhooly ◽  
Christopher T. Reinhard ◽  
Timothy W. Lyons
Keyword(s):  
Oxygen Isotope ◽  
Meromictic Lake ◽  
Sulfur Cycling ◽  
Isotope Study

An Oxygen Isotope Study of Seasonal Trends in Jinxiuchuan River of Jinan South Mountain

2014 ◽  
Vol 522-524 ◽  
pp. 954-957 ◽  
Author(s):  
Yong Sen Wang ◽  
Zheng He Xu ◽  
Si Fang Dong
Keyword(s):  
Stable Isotope ◽  
Oxygen Isotope ◽  
River Water ◽  
Oxygen Isotopes ◽  
Water Cycle ◽  
Climatic Factors ◽  
Isotope Composition ◽  
Stable Isotope Composition ◽  
Isotope Study ◽  
Isotopic Variations

The stable isotope composition of river water contains some information of water cycle and climatic factors, such as precipitation, evaporation and temperature. Oxygen isotopes in river water were monitored at one site in Jinxiuchuang basin of Jinan southern mountain.δ18O values of river water show a variation from-7.82 on July 6 to-9.98 on June 6. The result reveals that the river water was mainly supplied by the precipitation. The isotopic variations at Jinxiuchuan river have strong precipitation patterns owning to different rainfall in summer.

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