Publication detail

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.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

Lake sediments; Trace elements; Clay minerals; Weathering

Authors

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

Released

11. 4. 2020

Publisher

SPRINGER

Location

Berlín

ISBN

1866-6299

Periodical

Environmental Earth Sciences

Year of study

79

Number

8

State

Federal Republic of Germany

Pages from

1

Pages to

18

Pages count

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"
}