Detail publikace

Chemical weathering in Antarctica: an example of igneous rock particles in Big Lachman Lake sediments, James Ross Island

VAŠINKA, M. KRMÍČEK, L. VŠIANSKÝ, D. HRBÁČEK, F. NÝVLT, D.

Originální název

Chemical weathering in Antarctica: an example of igneous rock particles in Big Lachman Lake sediments, James Ross Island

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Lacustrine sediments of the Big Lachman Lake (James Ross Island, Antarctica) are dominated by clay- and silt-sized particles of varied petrographic composition. These are of volcanic origin and are derived predominantly from the Mendel Formation. The intensity of chemical weathering of volcanic rock particles in the sediments was expressed by the Chemical Index of Alteration (CIA), which reflects alteration of feldspars and formation of clay minerals. The observed mineral assemblage of montmorillonite, illite, and kaolinite probably originated from alteration of volcanic glass and from alteration of feldspars to clay minerals. CIA weathering rates from the lacustrine sediments are similar to those of Early Jurrasic high-Ti volcanic rocks of the Mount Poster Formation and Middle Jurrasic high-Ti volcanic rocks of the Mapple Formation from the Antarctic Peninsula. However, the sediments show a good fit in OIB-normalized incompatible trace-element patterns only with the high-Ti volcanic rocks from the Middle Jurassic rhyolites of the Mapple Formation, while the fit with Cenozoic basalts of the James Ross Island Volcanic Group is poorer. Rocks from the Antarctic Peninsula were probably transported through the Prince Gustav channel by small glaciers during the Neogene and Quaternary.

Klíčová slova

Lake sediments; Trace elements; Clay minerals; Weathering

Autoři

VAŠINKA, M.; KRMÍČEK, L.; VŠIANSKÝ, D.; HRBÁČEK, F.; NÝVLT, D.

Vydáno

11. 4. 2020

Nakladatel

SPRINGER

Místo

Berlín

ISSN

1866-6299

Periodikum

Environmental Earth Sciences

Ročník

79

Číslo

8

Stát

Spolková republika Německo

Strany od

1

Strany do

18

Strany počet

18

URL

https://link.springer.com/article/10.1007/s12665-020-08926-3

BibTex

@article{BUT164481,
  author="Martin {Vašinka} and Lukáš {Krmíček} and Dalibor {Všianský} and Filip {Hrbáček} and Daniel {Nývlt}",
  title="Chemical weathering in Antarctica: an example of igneous rock particles in Big Lachman Lake sediments, James Ross Island",
  journal="Environmental Earth Sciences",
  year="2020",
  volume="79",
  number="8",
  pages="1--18",
  doi="10.1007/s12665-020-08926-3",
  issn="1866-6299",
  url="https://link.springer.com/article/10.1007/s12665-020-08926-3"
}