A novel design for continuous measurement of CO2 from deep remineralization of petrogenic organic carbon
Abstract The oxidation of petrogenic organic carbon contributes a large CO2 flux to the atmosphere, regulating the geological carbon cycle. While few in situ fluxes have been measured in near‐surface sedimentary rocks, deep fracture‐controlled metamorphic terranes remain unexplored. Here, we present...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-05-01
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| Series: | Vadose Zone Journal |
| Online Access: | https://doi.org/10.1002/vzj2.70020 |
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| _version_ | 1849430984348401664 |
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| author | Wan‐Yin Lien Rick Chen Jui‐Fen Tsai Jhen‐Nien Chen Li‐Hung Lin Pei‐Ling Wang |
| author_facet | Wan‐Yin Lien Rick Chen Jui‐Fen Tsai Jhen‐Nien Chen Li‐Hung Lin Pei‐Ling Wang |
| author_sort | Wan‐Yin Lien |
| collection | DOAJ |
| description | Abstract The oxidation of petrogenic organic carbon contributes a large CO2 flux to the atmosphere, regulating the geological carbon cycle. While few in situ fluxes have been measured in near‐surface sedimentary rocks, deep fracture‐controlled metamorphic terranes remain unexplored. Here, we present a novel design for continuous in situ measurements of subsurface CO2 flux feasible for metamorphic rocks. The accumulative CO2 measurements were performed by either the passive mode or active recirculation on an 80‐m deep borehole in eastern Taiwan. Measurements in the passive mode yielded stepwise CO2 releases in the fractured zone and steady accumulation in the pulverized zone at rates (18.9–132 mgC m−2 day−1) resembling those for other active orogens. By contrast, the active recirculation produced an overestimation of CO2 flux. The high flux combined with variation patterns highlights heterogeneous metamorphic terranes as an important CO2 source and the necessities of extended monitoring using the passive mode. |
| format | Article |
| id | doaj-art-ac039626671a4459a7990722908596fa |
| institution | Kabale University |
| issn | 1539-1663 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Vadose Zone Journal |
| spelling | doaj-art-ac039626671a4459a7990722908596fa2025-08-20T03:27:47ZengWileyVadose Zone Journal1539-16632025-05-01243n/an/a10.1002/vzj2.70020A novel design for continuous measurement of CO2 from deep remineralization of petrogenic organic carbonWan‐Yin Lien0Rick Chen1Jui‐Fen Tsai2Jhen‐Nien Chen3Li‐Hung Lin4Pei‐Ling Wang5Department of Geosciences National Taiwan University Taipei TaiwanInstitute of Oceanography National Taiwan University Taipei TaiwanDepartment of Geosciences National Taiwan University Taipei TaiwanDepartment of Geosciences National Taiwan University Taipei TaiwanDepartment of Geosciences National Taiwan University Taipei TaiwanInstitute of Oceanography National Taiwan University Taipei TaiwanAbstract The oxidation of petrogenic organic carbon contributes a large CO2 flux to the atmosphere, regulating the geological carbon cycle. While few in situ fluxes have been measured in near‐surface sedimentary rocks, deep fracture‐controlled metamorphic terranes remain unexplored. Here, we present a novel design for continuous in situ measurements of subsurface CO2 flux feasible for metamorphic rocks. The accumulative CO2 measurements were performed by either the passive mode or active recirculation on an 80‐m deep borehole in eastern Taiwan. Measurements in the passive mode yielded stepwise CO2 releases in the fractured zone and steady accumulation in the pulverized zone at rates (18.9–132 mgC m−2 day−1) resembling those for other active orogens. By contrast, the active recirculation produced an overestimation of CO2 flux. The high flux combined with variation patterns highlights heterogeneous metamorphic terranes as an important CO2 source and the necessities of extended monitoring using the passive mode.https://doi.org/10.1002/vzj2.70020 |
| spellingShingle | Wan‐Yin Lien Rick Chen Jui‐Fen Tsai Jhen‐Nien Chen Li‐Hung Lin Pei‐Ling Wang A novel design for continuous measurement of CO2 from deep remineralization of petrogenic organic carbon Vadose Zone Journal |
| title | A novel design for continuous measurement of CO2 from deep remineralization of petrogenic organic carbon |
| title_full | A novel design for continuous measurement of CO2 from deep remineralization of petrogenic organic carbon |
| title_fullStr | A novel design for continuous measurement of CO2 from deep remineralization of petrogenic organic carbon |
| title_full_unstemmed | A novel design for continuous measurement of CO2 from deep remineralization of petrogenic organic carbon |
| title_short | A novel design for continuous measurement of CO2 from deep remineralization of petrogenic organic carbon |
| title_sort | novel design for continuous measurement of co2 from deep remineralization of petrogenic organic carbon |
| url | https://doi.org/10.1002/vzj2.70020 |
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