Top 2 Eartharxiv Papers Today


1.99 Mikeys
#1. Weak phases production and heat generation controls fault friction during seismic slip
Hadrien Rattez, Manolis Veveakis
The triggering and magnitude of earthquakes is determined by the friction evolution along faults. Experimental results have revealed a drastic decrease of the friction coefficient for velocities close to the maximum seismic one, independently of the material studied. Due to the extreme loading conditions during seismic slip, many competing physical phenomena are occurring (like mineral decomposition, nanoparticle lubrication, melting among others) that are typically thermal in origin and are changing the nature of the material. Here we show that a large set of experimental data for different rocks can be described by such thermally-activated mechanisms, combined with the production of weak phases. By taking under account the energy balance of all processes during fault movement, we present a framework that reconciles the data, and is capable of explaining the frictional behaviour of faults, across the full range of slip velocities. The similarity of microstructures observed in nature and in experiments suggests that energetic...
more | pdf
Figures
None.
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 2
Total Words: 0
Unqiue Words: 0

1.99 Mikeys
#2. The miniature paleo-speleothems record of the ‘greening’ Earth in the early Ediacaran (635 Ma)
Guanghong Zhou, Tian Gan, Taiyi Luo, Mingzhong Zhou, Weijun Luo, Shijie Wang
A rapid transition from the snowball Earth to the ‘greening’ Earth in the early Ediacaran, triggered by enhanced terrestrial weathering and then by elevated primary productivity, has been speculated by isotope researches 3. However, direct geological evidence of continental weathering in the early Ediacaran is still lacking. This study examines paleo-speleothems related to the karstic dissolution surface at the upmost cap dolostone of the early Ediacaran Doushantuo Formation (635 Ma). Observation of sheet-crack thin-sections from platform to slope facies in South China suggests that plentiful speleothem-like structures in chalcedony should be interpreted as low-temperature silicified calcareous paleo-speleothems. Furthermore, isopachous dolomite, speleothems, chalcedony, and quartz should have filled sheet-cracks during the uplift, karstification, and subsequently hydrothermal processes before the secondary transgression. Thus these widely distributed paleo-speleothems, which are direct geological evidence for the ‘greening’ Earth...
more | pdf
Figures
None.
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 6
Total Words: 0
Unqiue Words: 0

About

Assert is a website where the best academic papers on arXiv (computer science, math, physics), bioRxiv (biology), BITSS (reproducibility), EarthArXiv (earth science), engrXiv (engineering), LawArXiv (law), PsyArXiv (psychology), SocArXiv (social science), and SportRxiv (sport research) bubble to the top each day.

Papers are scored (in real-time) based on how verifiable they are (as determined by their Github repos) and how interesting they are (based on Twitter).

To see top papers, follow us on twitter @assertpub_ (arXiv), @assert_pub (bioRxiv), and @assertpub_dev (everything else).

To see beautiful figures extracted from papers, follow us on Instagram.

Tracking 189,567 papers.

Search
Sort results based on if they are interesting or reproducible.
Interesting
Reproducible
Feedback
Online
Stats
Tracking 189,567 papers.