Crustal melting in orogenic belts revealed by eclogite thermal properties

Zhang, Baohua; Fei, Hongzhan; Ge, Jianhua; Zeng, Lingsen; Xia, Qunke

doi:10.1038/s41467-022-32484-w

Cited by 7 publications

(9 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, after dehydration, due to the significant increase in thermal conductivity, the enhanced heat transport would lead to rapid warming of the tremolite‐enriched layer. Compared with typical mantle rocks (Figure S3 in Supporting Information ), the thermal conductivity of tremolite is slightly greater than those of harzburgite and dunite (Ge et al., 2021) but is slightly less than that of eclogite (B. Zhang et al., 2022).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

et al. 2023

View full text Add to dashboard Cite

Thermal conductivity (κ) and thermal diffusivity (D) of tremolite were measured at up to 2.5 GPa and 1,373 K using the transient plane‐source method in a multi‐anvil apparatus. Thermal conductivity and thermal diffusivity of tremolite decrease monotonically before dehydration (<1,173 K) and increase significantly after dehydration. Tremolite exhibits positive pressure dependence before dehydration. Heat capacity (C) of tremolite calculated from κ and D shows a positive pressure dependence and is controlled by an almost constant thermal expansion coefficient (α) with temperature. Conductive heat transport and radiative heat transport dominate the heat transport process before dehydration, and the significant increase in thermal conductivity after dehydration is attributed to convective heat transport. A compositional model of the Venusian lithosphere composed of a basaltic crust and peridotite mantle with or without tremolite was established. The thickness of the Venusian lithosphere with or without tremolite for Venus was calculated by combining the heat flow (from 20 to 80 mW/m2) at a certain depth (from 5 to 25 km) of crust, ranging from 24.4 to 184.6 km.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Compared with typical mantle rocks (Figure S3 in Supporting Information S1), the thermal conductivity of tremolite is slightly greater than those of harzburgite and dunite (Ge et al, 2021) but is slightly less than that of eclogite (B. Zhang et al, 2022).…”

Section: Tablementioning

confidence: 94%

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

et al. 2023

View full text Add to dashboard Cite

show abstract

“…(2019) (ca. 2% errors) and (Zhang et al, 2022) (less than 1.5% errors) to significantly reduce signal measurement errors, so an error smaller than 1.5% considered acceptable. GPa.…”

Section: Text S2mentioning

confidence: 99%

Anomalous thermal structures of subduction zones revealed by thermal properties of clinochlore at high temperature and pressure

Zhang,

Wang,

Tan

et al. 2023

Geological Society of America Bulletin

View full text Add to dashboard Cite

Clinochlore is a major hydrous mineral in subduction zones, and its thermophysical properties at high temperature and pressure are critical to the thermal structures of subduction zones. Here, we used the pulse heating method to measure thermal diffusivity and thermal conductivity of clinochlore at 0.5−4.0 GPa and 298−1373 K. Our results indicate that upon heating, thermal diffusivity and thermal conductivity decrease from ∼9.6 × 10−7 m2 s−1 to 4.3 × 10−7 m2 s−1 and from ∼3.5 W m−1 K−1 to 1.9 W m−1 K−1, respectively, before dehydration, but this trend is reversed after dehydration. In general, the pressure derivatives for the thermal transport properties also decrease with temperature before dehydration. Lattice heat transfer is the dominant mechanism before dehydration, but fluid is involved after dehydration. Using our experimental data, we simulated the temperature distribution of subducting slabs containing clinochlore at volume fractions of 0%, 10%, 20%, 50%, and 100%. Our simulations showed that the heat insulation effect caused by the presence of clinochlore could result in an increase in temperature by 30−60 K for the upper part of the subducting slab.

show abstract

“…Thermal conductivity, the ability to conduct heat, of minerals under relevant high P-T conditions is a key transport property to control the thermal evolution and geodynamics in Earth's interior (Xu et al 2004;Ohta et al 2012Ohta et al , 2017Hofmeister and Branlund 2015;Hsieh et al 2017Hsieh et al , 2018Hsieh et al , 2022aY. Zhang et al 2019;Guo et al 2022;Zhang et al 2022). Such crucial property of garnets, however, had only been studied at relatively low pressure and a wide range of temperature conditions, see, e.g., (Horai 1971;Slack and Oliver 1971;Osako et al 2004;Hofmeister 2006;Marquardt et al 2009;Hofmeister and Branlund 2015).…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of aluminous garnets in Earth’s deep interior

Hung,

Tsao,

Lin

et al. 2024

American Mineralogist

View full text Add to dashboard Cite

Aluminous garnets [(Mg,Fe,Ca) 3 Al 2 (SiO 4 ) 3 ] are a key mineral group in Earth's interior. Their thermal conductivity under relevant chemical compositions and high pressure-temperature (P-T) conditions plays a crucial role in affecting the thermal states of pyrolitic mantle and subducted basaltic crust over the depth range they are present. Using ultrafast optical pump-probe spectroscopy combined with an externally-heated diamond anvil cell, we have precisely determined the high P-T thermal conductivity of aluminous garnets, including pyrope, grossular, and pyrope-almandine solid solution. We find that the variable chemical composition has minor effects on the thermal conductivity of these garnets over the P-T range we studied. Combined with previous results, we provide new depth-dependent thermal conductivity profiles for a pyrolitic mantle and a subducted basaltic crust. These important results significantly benefit geodynamics simulations and advance our understanding of the thermal structure and evolution dynamics in Earth's upper mantle and transition zone. In addition, as garnets are also a key, useful material family for modern technology, our results on the thermal property of natural garnets also shed lights on the novel design of optical and electronic devices based on a variety of synthetic nonsilicate garnets.

show abstract

Crustal melting in orogenic belts revealed by eclogite thermal properties

Cited by 7 publications

References 81 publications

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

Anomalous thermal structures of subduction zones revealed by thermal properties of clinochlore at high temperature and pressure

Thermal conductivity of aluminous garnets in Earth’s deep interior

Contact Info

Product

Resources

About