Seismic Signature of the Continental Crust: What Thermodynamics Says. An Example From the Italian Peninsula
Tectonics, ISSN: 1944-9194, Vol: 36, Issue: 12, Page: 3192-3208
2017
- 21Citations
- 25Captures
Metric Options: Counts1 Year3 YearSelecting the 1-year or 3-year option will change the metrics count to percentiles, illustrating how an article or review compares to other articles or reviews within the selected time period in the same journal. Selecting the 1-year option compares the metrics against other articles/reviews that were also published in the same calendar year. Selecting the 3-year option compares the metrics against other articles/reviews that were also published in the same calendar year plus the two years prior.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
Unraveling the temperature distribution and composition of Earth's crust is key for understanding its origin, evolution, and mechanical behavior. Models of compressional (V) and shear wave (V) velocity are obtained from seismological studies and can be interpreted in terms of temperature and composition, using relationship defined through laboratory experiments. These empirical evidences often do not properly account for the effects driven by temperature, pressure, water content, and phase change of minerals. In this study, we use thermodynamic modeling to properly investigate the role of these variables in affecting seismic properties, as a tool to guide (joint) inversion and interpretation of geophysical data. We find that mineralogical phase transitions can be more seismically relevant than a change in chemical composition. In particular, the α-β quartz transition would cause a jump in acoustic impedance and V/V ratio >8%, occurring in the 15–25 km depth range, depending on the thermal gradient. Moreover, in the case of a cold lower crust, the consumption of plagioclase in favor of high-velocity minerals might represent another relevant seismic discontinuity. Different chemical compositions proposed for the Italian crust would be seismically indistinguishable, since they give overlapping seismic properties. Values of V < 3.6 km s would imply a strong contribution of sediments and/or partial melt. The V/density ratio shows a narrow variability, suggesting that densities at depth can be directly derived in first approximation from V.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85038921459&origin=inward; http://dx.doi.org/10.1002/2016tc004405; https://agupubs.onlinelibrary.wiley.com/doi/10.1002/2016TC004405; http://doi.wiley.com/10.1002/2016TC004405; http://onlinelibrary.wiley.com/wol1/doi/10.1002/2016TC004405/fullpdf; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2016TC004405; https://dx.doi.org/10.1002/2016tc004405; https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016TC004405
American Geophysical Union (AGU)
Provide Feedback
Have ideas for a new metric? Would you like to see something else here?Let us know