CO 2 flux from Javanese mud volcanism
Studying the quantity and origin of CO emitted by back-arc mud volcanoes is critical to correctly model fluid-dynamical, thermodynamical, and geochemical processes that drive their activity and to constrain their role in the global geochemical carbon cycle. We measured CO fluxes of the Bledug Kuwu m...
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Published in | Journal of geophysical research. Solid earth Vol. 122; no. 6; p. 4191 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.06.2017
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Subjects | |
Online Access | Get more information |
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Summary: | Studying the quantity and origin of CO
emitted by back-arc mud volcanoes is critical to correctly model fluid-dynamical, thermodynamical, and geochemical processes that drive their activity and to constrain their role in the global geochemical carbon cycle. We measured CO
fluxes of the Bledug Kuwu mud volcano on the Kendeng Fold and thrust belt in the back arc of Central Java, Indonesia, using scanning remote sensing absorption spectroscopy. The data show that the expelled gas is rich in CO
with a volume fraction of at least 16 vol %. A lower limit CO
flux of 1.4 kg s
(117 t d
) was determined, in line with the CO
flux from the Javanese mud volcano LUSI. Extrapolating these results to mud volcanism from the whole of Java suggests an order of magnitude total CO
flux of 3 kt d
, comparable with the expected back-arc efflux of magmatic CO
. After discussing geochemical, geological, and geophysical evidence we conclude that the source of CO
observed at Bledug Kuwu is likely a mixture of thermogenic, biogenic, and magmatic CO
, with faulting controlling potential pathways for magmatic fluids. This study further demonstrates the merit of man-portable active remote sensing instruments for probing natural gas releases, enabling bottom-up quantification of CO
fluxes. |
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ISSN: | 2169-9313 |
DOI: | 10.1002/2017JB013968 |