Thrusts control the thermal maturity of accreted sediments
<p>Thermal maturity assessments of hydrocarbon-generation potential and thermal history rarely consider how upper-plate structures developing during subduction influence the trajectories of accreted sediments. Our thermomechanical models of subduction support that thrusts evolving under variab...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2024-01-01
|
| Series: | Solid Earth |
| Online Access: | https://se.copernicus.org/articles/15/1/2024/se-15-1-2024.pdf |
| _version_ | 1827387464219623424 |
|---|---|
| author | U. Mannu U. Mannu D. Fernández-Blanco A. Miyakawa T. Gerya M. Kinoshita |
| author_facet | U. Mannu U. Mannu D. Fernández-Blanco A. Miyakawa T. Gerya M. Kinoshita |
| author_sort | U. Mannu |
| collection | DOAJ |
| description | <p>Thermal maturity assessments of hydrocarbon-generation potential and thermal history rarely consider how upper-plate structures developing during subduction influence the trajectories of accreted sediments. Our thermomechanical models of subduction support that thrusts evolving under variable sedimentation rates and décollement strengths fundamentally influence the trajectory, temperature, and thermal maturity of accreting sediments. This is notably true for the frontal thrust, which pervasively partitions sediments along a low- and a high-maturity path. Our findings imply that interpretations of the distribution of thermal maturity cannot be detached from accounts of the length and frequency of thrusts and their controlling factors. Our approach takes these factors into consideration and provides a robust uncertainty estimate of maximum exposure temperatures as a function of vitrinite reflectance and burial depth. As a result, our models reduce former inconsistencies between predicted and factual thermal maturity distributions in accretionary wedges.</p> |
| first_indexed | 2024-03-08T16:02:38Z |
| format | Article |
| id | doaj.art-81d3b82ecb1b4f1aa010d6ad2da75010 |
| institution | Directory Open Access Journal |
| issn | 1869-9510 1869-9529 |
| language | English |
| last_indexed | 2024-03-08T16:02:38Z |
| publishDate | 2024-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Solid Earth |
| spelling | doaj.art-81d3b82ecb1b4f1aa010d6ad2da750102024-01-08T10:16:07ZengCopernicus PublicationsSolid Earth1869-95101869-95292024-01-011512110.5194/se-15-1-2024Thrusts control the thermal maturity of accreted sedimentsU. Mannu0U. Mannu1D. Fernández-Blanco2A. Miyakawa3T. Gerya4M. Kinoshita5Department of Earth Sciences, Indian Institute of Technology, Gandhinagar 382355, IndiaEarthquake Research Institute, The University of Tokyo, 1-1-1 Yayoi Bunkyo-ku, Tokyo, 113-0032, JapanBarcelona Center for Subsurface Imaging, Passeig Marítim de Barceloneta 37–49, Barcelona, SpainGeological Survey of Japan, AIST, Central 7, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8567, JapanInstitute of Geophysics, Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, SwitzerlandEarthquake Research Institute, The University of Tokyo, 1-1-1 Yayoi Bunkyo-ku, Tokyo, 113-0032, Japan<p>Thermal maturity assessments of hydrocarbon-generation potential and thermal history rarely consider how upper-plate structures developing during subduction influence the trajectories of accreted sediments. Our thermomechanical models of subduction support that thrusts evolving under variable sedimentation rates and décollement strengths fundamentally influence the trajectory, temperature, and thermal maturity of accreting sediments. This is notably true for the frontal thrust, which pervasively partitions sediments along a low- and a high-maturity path. Our findings imply that interpretations of the distribution of thermal maturity cannot be detached from accounts of the length and frequency of thrusts and their controlling factors. Our approach takes these factors into consideration and provides a robust uncertainty estimate of maximum exposure temperatures as a function of vitrinite reflectance and burial depth. As a result, our models reduce former inconsistencies between predicted and factual thermal maturity distributions in accretionary wedges.</p>https://se.copernicus.org/articles/15/1/2024/se-15-1-2024.pdf |
| spellingShingle | U. Mannu U. Mannu D. Fernández-Blanco A. Miyakawa T. Gerya M. Kinoshita Thrusts control the thermal maturity of accreted sediments Solid Earth |
| title | Thrusts control the thermal maturity of accreted sediments |
| title_full | Thrusts control the thermal maturity of accreted sediments |
| title_fullStr | Thrusts control the thermal maturity of accreted sediments |
| title_full_unstemmed | Thrusts control the thermal maturity of accreted sediments |
| title_short | Thrusts control the thermal maturity of accreted sediments |
| title_sort | thrusts control the thermal maturity of accreted sediments |
| url | https://se.copernicus.org/articles/15/1/2024/se-15-1-2024.pdf |
| work_keys_str_mv | AT umannu thrustscontrolthethermalmaturityofaccretedsediments AT umannu thrustscontrolthethermalmaturityofaccretedsediments AT dfernandezblanco thrustscontrolthethermalmaturityofaccretedsediments AT amiyakawa thrustscontrolthethermalmaturityofaccretedsediments AT tgerya thrustscontrolthethermalmaturityofaccretedsediments AT mkinoshita thrustscontrolthethermalmaturityofaccretedsediments |