Journal ArticleDOI
Carbon dioxide released from subduction zones by fluid-mediated reactions
TLDR
In this paper, the balance between carbonate subduction into the deep Earth and CO2 release through degassing at volcanoes is critical for the carbon cycle, and fluid-mediated reactions could liberate significant amounts of carbon from the subducting slab for later release at arc volcanoes.Abstract:
The balance between carbonate subduction into the deep Earth and CO2 release through degassing at volcanoes is critical for the carbon cycle. Geochemical analyses of an exhumed subduction zone complex in Greece show that fluid-mediated reactions could liberate significant amounts of carbon from the subducting slab for later release at arc volcanoes.read more
Citations
More filters
Journal ArticleDOI
Reevaluating carbon fluxes in subduction zones, what goes down, mostly comes up.
TL;DR: Carbon fluxes in subduction zones can be better constrained by including new estimates of carbon concentration in subducting mantle peridotites, consideration of carbonate solubility in aqueous fluid along subduction geotherms, and diapirism of carbon-bearing metasediments.
Journal ArticleDOI
Slab melting as a barrier to deep carbon subduction
TL;DR: It is shown that the majority of slab geotherms will intersect a deep depression along the melting curve of carbonated oceanic crust at depths of approximately 300 to 700 kilometres, creating a barrier to direct carbonate recycling into the deep mantle.
Journal ArticleDOI
Deep carbon cycles constrained by a large-scale mantle Mg isotope anomaly in eastern China
Shuguang Li,Shuguang Li,Wei Yang,Shan Ke,Xunan Meng,Heng-Ci Tian,Lijuan Xu,Yongsheng He,Jian Huang,Xuan-Ce Wang,Qunke Xia,Weidong Sun,Xiaoyong Yang,Zhong-Yuan Ren,Haiquan Wei,Yongsheng Liu,Fancong Meng,Jun Yan +17 more
TL;DR: In this article, a large-scale mantle low δ26Mg anomaly in eastern China has been delineated, suggesting the contribution of sedimentary carbonates recycled into the upper mantle, but limited into the lower mantle.
Journal ArticleDOI
The Global Range of Subduction Zone Thermal Structures from Exhumed Blueschists and Eclogites: Rocks Are Hotter than Models
TL;DR: In this article, the authors compare the maximum pressure P-T conditions of exhumed subduction-related metamorphic rocks with those predicted by computational thermal models of subduction systems.
Journal ArticleDOI
Fluid and mass transfer at subduction interfaces-The field metamorphic record
TL;DR: In this article, the authors consider records of fluid and mass transfer at localities representing various depths and structural expressions of evolving paleo-interfaces, ranging widely in structural character, the rock types involved, and the rheology of these rocks.
References
More filters
Journal ArticleDOI
An internally consistent thermodynamic data set for phases of petrological interest
TL;DR: In this paper, the thermodynamic properties of 154 mineral endmembers, 13 silicate liquid end-members and 22 aqueous fluid species are presented in a revised and updated data set.
Journal ArticleDOI
The chemical composition of subducting sediment and its consequences for the crust and mantle
Terry Plank,Charles H. Langmuir +1 more
TL;DR: This article evaluated subducting sediments on a global basis in order to better define their chemical systematics and to determine both regional and global average compositions, and then used these compositions to assess the importance of sediments to arc volcanism and crust-mantle recycling, and to re-evaluate the chemical composition of the continental crust.
Journal ArticleDOI
Computation of phase equilibria by linear programming: A tool for geodynamic modeling and its application to subduction zone decarbonation
TL;DR: In this article, an algorithm for the construction of phase diagram sections is formulated that is well suited for geodynamic problems in which it is necessary to assess the influence of phase transitions on rock properties or the evolution and migration of fluids.
Journal ArticleDOI
The global range of subduction zone thermal models
TL;DR: In this article, a suite of thermal models for the global subduction system is presented, where the authors model 56 segments of subduction zones using kinematically defined slabs based on updated geometries from Syracuse and Abers (2006).
Journal ArticleDOI
The deep carbon cycle and melting in Earth's interior
TL;DR: Carbon geochemistry of mantle-derived samples suggests that the fluxes and reservoir sizes associated with deep cycle are in the order of 1012−13−g−C/yr and 1022−23−g C, respectively.