Present-day volcanism on Venus as evidenced from weathering rates of olivine

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Science Advances  03 Jan 2020:
Vol. 6, no. 1, eaax7445
DOI: 10.1126/sciadv.aax7445


  • Fig. 1 Images of olivine crystals before and after oxidation.

    (A) 900°C experiments and (B) 600°C experiments. Images are arranged in the order of increasing time of alteration from left to right. Photo credit: Delia Enriquez-Draper, USRA. Results show a decrease in the green coloration of olivine and the formation of coating an increase in time of oxidation. The coating is initially metallic before becoming dull red with oxidation time.

  • Fig. 2 VNIR reflectance for unoxidized and oxidized crystals of olivine.

    (A) Oxidization at 900°C and (B) oxidization at 600°C, offset for clarity based on increasing time of oxidation as indicated in Fig. 1. China-10 was also measured as the unaltered olivine crystal reference for both temperatures. Spectra show a decrease in olivine features with increasing time of oxidation by first becoming relatively featureless and then showing a hematite signature.

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