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THOR - the rock strength database

Authors: Barcelos Haag, Mauricio; Schoenbohm, Lindsay;

THOR - the rock strength database

Abstract

Thor is an extensive and (nearly) exhaustive rock strength compilation based on publications from 1980 - 2024 (Scopus). Data reported in Thor includes: Search tool and watershed erodibility calculator: A Microsoft Excel®-based tool that enables users to select specific lithologies and generate summary statistics. This tool also calculates watershed erodibility by accounting for lithologies and their respective proportions in a watershed. RN - rebound values (all converted to Schmidt Hammer model N), grouped by lithology. σUCS - uniaxial compressive strength (σUCS), grouped by lithology. LE - lithologic erodibility index (LE), grouped by lithology (also referred to as Klp in this database). Authors list - a list of all publications/references used in this compilation. Contributions Welcome! Researchers are encouraged to contribute data to expand the database. Please send your data submissions to: mauricio.haag@mail.utoronto.ca Please cite as: Haag, M.B., Schoenbohm, L.M., 2025. Thor: a rock strength database for investigating lithologic controls in landscape evolution. Earth and Planetary Science Letters 660, 119364. https://doi.org/10.1016/j.epsl.2025.119364

Os valores de resistência das rochas apresentados nesta compilação baseiam-se principalmente em medições médias realizadas em cada local, utilizando o martelo Schmidt tanto em campo quanto em laboratório. Cada "sitio" é composto por pelo menos algumas medições (geralmente ≥ 10), calculadas em média de acordo com os padrões ASTM ou ISRM. Nesta compilação, todos os valores são corrigidos para a horizontal, conforme a recomendação de Basu & Aydin (2004), enquanto as correções relacionadas à energia de impacto (modelo L ou N) são baseadas em Aydin & Basu (2005). Os valores são convertidos para resistência à compressão uniaxial (σUCS, MPa) de acordo com Aydin & Basu (2005). Em estudos de evolução da paisagem, as taxas de erosão e os parâmetros topográficos podem estar relacionados com a resistência da rocha por meio de um índice de erodibilidade litológica (LE). Aqui, o LE é reportado como ∝ σUCS⁻² (Sklar & Dietrich, 2001; Turowski et al., 2023). A litologia é classificada de acordo com as publicações originais e os dados são diferenciados ainda mais sempre que possível.

Los valores de resistencia de las rocas en esta compilación se basan principalmente en mediciones promedio por sitio realizadas con el martillo Schmidt en campo y laboratorio. Cada "sitio" está compuesto por al menos unas pocas mediciones (generalmente ≥ 10) promediadas de acuerdo con los estándares ASTM o ISRM. En esta compilación, todos los valores se corrigen a la horizontal siguiendo la recomendación de Basu & Aydin (2004), y las correcciones relacionadas con la energía y el modelo del martillo (ya sea L o N) se basan en Aydin & Basu (2005). Los valores se convierten a resistencia a la compresión uniaxial (σUCS, MPa) según Aydin & Basu (2005). En los estudios de evolución del paisaje, las tasas de erosión y los parámetros topográficos pueden escalar con la resistencia de la roca mediante un índice de erodibilidad litológica (LE). Aquí, el LE se reporta como ∝ σUCS⁻² (Sklar & Dietrich, 2001; Turowski et al., 2023). La litología se clasifica de acuerdo con las publicaciones originales y los datos se diferencian aún más siempre que sea posible.

Rock strength values in this compilation are mainly based on site-averaged Schmidt Hammer measurements obtained in the field and the laboratory. Each "site" is composed of at least a few measurements (generally ≥ 10) averaged according to either ASTM or ISRM standards. In this compilation, all values are corrected to the horizontal following the recommendation of Basu & Aydin (2004), and corrections of the hammer energy and model (either L or N) are based on Aydin & Basu (2005). Values are converted to uniaxial compressive strength (σUCS, MPa) following Aydin & Basu (2005). In landscape evolution studies, erosion rates and topographic metrics may scale with rock strength through an lithologic erodibility index (LE). Here, LE is reported as ∝ σUCS⁻² (Sklar & Dietrich, 2001; Turowski et al., 2023). Lithology is classified according to original publications and data is further differentiated whenever possible.

本编录中的岩石强度值主要基于现场和实验室使用施密特锤进行的地点平均测量。每个“地点”通常由至少几次测量(通常 ≥ 10 次)组成,并根据 ASTM 或 ISRM 标准计算平均值。在本编录中,所有数值均按照 Basu & Aydin (2004) 的建议进行水平校正,锤子的能量和型号(L 或 N)的校正依据 Aydin & Basu (2005) 。数值随后根据 Aydin & Basu (2005) 转换为单轴抗压强度(σUCS,MPa)。在景观演化研究中,侵蚀速率和地形指标可能通过岩石强度与岩性可侵蚀性指数(LE)相关联。此处,LE 表示为 ∝ σUCS⁻² (Sklar & Dietrich, 2001; Turowski et al., 2023)。岩性分类基于原始出版物,并在可能的情况下进一步细化数据分类。

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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