English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Geochemical significance of lithium and boron isotopic heterogeneity evolving during the crystallization of granitic melts

Authors
/persons/resource/xiufang

Lei,  Xiufang
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/romer

Romer,  R. L.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/glodnyj

Glodny,  J.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Jiang,  Shao-Yong
External Organizations;

External Ressource
No external resources are shared
Fulltext (public)

5016078.pdf
(Publisher version), 2MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Lei, X., Romer, R. L., Glodny, J., Jiang, S.-Y. (2023): Geochemical significance of lithium and boron isotopic heterogeneity evolving during the crystallization of granitic melts. - Geology, 51, 6, 581-585.
https://doi.org/10.1130/G50983.1


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016078
Abstract
We present Li and B isotope data for muscovite, biotite, and feldspar + quartz separated from two-mica granite and biotite granite samples from the Huayang-Wulong granite suite (south Qinling, central China). Our data demonstrate systematic differences in the Li and B isotopic compositions among these minerals. Our results indicate that early-crystallizing minerals have lower δ7 Li and δ11B values than the original melt and that residual melts and late magmatic fluids may acquire anomalously high δ7 Li and δ11B values. Furthermore, our data imply that (1) late melts and magmatic fluids do not reflect the composition of their source melt, (2) minerals that crystallized over a large segment of magma evolution may be isotopically zoned, and (3) mineral-selective alteration by late magmatic fluids camouflages the source of the fluid, whose δ7 Li and δ11B values reflect the isotopic compositions of the altered minerals rather than the composition of the remaining rock.