Article
Geochemistry & Geophysics
Isaac J. Larsen, Andre Eger, Peter C. Almond, Evan A. Thaler, J. Michael Rhodes, Guenther Prasicek
Summary: Chemical weathering affects biogeochemical cycling, climate, and ecosystem function. Physical erosion affects chemical weathering rates by supplying fresh minerals to the critical zone. Vegetation affects chemical weathering rates through physical processes and acid production. However, the role of vegetation in different landscapes is unclear.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Xinyu Liu, Xianwei Zhang, Lingwei Kong, Gang Wang, Honghu Liu
Summary: Chemical weathering reduces the strength and stability of granite regolith and increases its water sensitivity. Understanding the correlation between chemical weathering and mechanical properties of regolith is crucial for assessing gully erosion. This study investigates the chemical weathering of granite and evaluates the appropriateness of previous chemical weathering indices, providing a comprehensive dataset on the properties of granite regolith and enhancing the understanding of chemical weathering.
Article
Geosciences, Multidisciplinary
Xinyu Liu, Xianwei Zhang, Lingwei Kong, Gang Wang, Honghu Liu
Summary: Chemical weathering significantly affects the strength and stability of granite regolith, and studying the correlation between chemical weathering degree and mechanical properties can enhance understanding of geomorphological evolution.
Article
Soil Science
Yujie Wei, Chongfa Cai, Zhonglu Guo, Junguang Wang
Summary: This study systematically investigated the aggregate structure of granitic soils in subtropical regions. The results showed that macroaggregate played an important role in the soil aggregation, and disaggregation reduction was a better indicator of aggregate stability. The formation and stability of aggregates were influenced by rainfall conditions and soil properties.
SOIL & TILLAGE RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Mark Baum, Minmin Fu, Stephen Bourguet
Summary: This study found that the long-term variability of global climate is influenced by the size and shape of continents, while the distribution of continents does not explain climate changes well. Runoff patterns are complex, sensitive to detailed features of continental geometry.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Xinyu Liu, Xianwei Zhang, Lingwei Kong, Gang Wang, Honghu Liu
Summary: This study investigated the disintegration behavior of granite residual soil in collapsing gully areas in southern China through laboratory disintegration tests. It was found that the red soil layer and the shallow sandy soil layer exhibited complete and rapid disintegration, while the deeper layers showed slower and incomplete disintegration. The weakening of cementation was identified as the main cause of soil disintegration and gully collapse.
Article
Engineering, Civil
Ruo-Mei Wang, Chen-Feng You, Chuan-Hsiung Chung, Kuo-Fang Huang, Ya-Ju Hsu
Summary: The study finds that the (U-234/U-238) in small mountainous rivers (SMRs) in Taiwan can reflect the relative contributions of physical erosion and chemical weathering within the river catchment. The mountain area is mainly characterized by physical erosion, which increases (U-234/U-238) and reduces U concentrations, inhibiting chemical weathering. In contrast, the decreased (U-234/U-238) and increased Na/Li and δLi-7 downstream indicate enhanced chemical weathering.
JOURNAL OF HYDROLOGY
(2022)
Article
Geosciences, Multidisciplinary
Dalan Liao, Yusong Deng, Xiaoqian Duan, Chongfa Cai, Shuwen Ding
Summary: Red loam hills with granitic parent material are susceptible to gully erosion under continuous runoff, and Atterberg limits are important indicators affecting soil erosion resistance. The weathering intensity is significantly correlated with Atterberg limits, with zonal characteristics from north to south.
Article
Multidisciplinary Sciences
Liting Zhang, Shujun Sun, Mengqi Lin, Kaijun Feng, Yue Zhang, Jinshi Lin, Hongli Ge, Yanhe Huang, Fangshi Jiang
Summary: The collapse of walls is a critical problem in Benggang landforms in South China. The soil water characteristic curve (SWCC) is an important indicator for analyzing soil moisture, but its influence on collapsing walls is still unclear. This research used drying experiments to study the SWCCs of different soil layers in collapsing walls. The findings show that soil water holding capacity decreases with increasing soil depth, and gravel content and particle morphology also affect the SWCCs.
Article
Geosciences, Multidisciplinary
Ahmad Heidari, Maryam Osat, Maria Konyushkova
Summary: This study utilized various geochemical indices and X-ray fluorescence analysis to evaluate the weathering intensity of soil, highlighting the effectiveness of these indices in identifying soil classes.
Article
Geology
T. Inoue, N. Izumi, J. S. Scheingross, Y. Hiramatsu, S. Tanigawa, T. Sumner
Summary: Short waterfalls retreat up to five times faster than taller waterfalls due to the difference in erosion mechanism, where short waterfalls form small eroding bed-rock steps, while tall waterfalls form large bedrock plunge pools.
Article
Environmental Sciences
Li Wang, Lingfeng Shen, Wei Sun, Bin Ji, Honghu Tang
Summary: This study investigated the influence of natural weathering on the mineralogical, physical, and chemical properties of molybdenum tailings stored at different stacking ages. The results showed that the mineralogical and chemical compositions of the tailings remained stable after stacking for different years. In addition, natural weathering significantly improved the physical properties of the tailings, enhancing the structural stability of the aggregates.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Andre Baldermann, Martin Dietzel, Volker Reinprecht
Summary: Research has shown that factors such as sediment composition, weathering regime, and hydrochemistry have significant impacts on the initiation and progression of landslides. Infiltration of low mineralized meteoric water and percolating, highly mineralized water play crucial roles in triggering and advancing landslides.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geography, Physical
Greg R. Hancock, Garry R. Willgoose
Summary: Incision resulting from fluvial erosion is a crucial process in simulating landform evolution, with a range of processes stopping incision including those related to landform shape and armoring. Field data is essential to parameterize and validate landscape evolution models, which have more capabilities than currently available field data for validation.
EARTH SURFACE PROCESSES AND LANDFORMS
(2021)
Article
Agronomy
Fangwang Tang, Yufei Yao, Jinxi Song, Chengcheng Wang, Yu Liu
Summary: Soil erosion is effectively controlled by vegetation restoration, but the interactive role of erosion and cropland revegetation on soil enzyme activities and microbial nutrient limitations is less understood. Results showed that C-, N-, and P-acquiring enzyme activities were larger in deposited landscapes than in eroded ones. Microbial metabolism was co-limited by N and P, with P being the most limiting factor. Ameliorated enzyme activities, decreased microbial N limitation but relatively strengthened microbial P limitation were found in deposited areas compared to eroded areas. Such variations provide insights into C and nutrient cycling for agroecosystems and revegetation ecosystems in eroded environments.
Article
Geology
Jean Louise Dixon, Oliver A. Chadwick, Milan J. Pavich
Article
Geosciences, Multidisciplinary
Russell P. Callahan, Ken L. Ferrier, Jean Dixon, Anthony Dosseto, W. Jesse Hahn, Barbara S. Jessup, Scott N. Miller, Carolyn T. Hunsaker, Dale W. Johnson, Leonard S. Sklar, Clifford S. Riebe
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2019)
Article
Geography, Physical
Yunxiang Chen, Roman A. DiBiase, Nicholas McCarroll, Xiaofeng Liu
EARTH SURFACE PROCESSES AND LANDFORMS
(2019)
Article
Geochemistry & Geophysics
Alexander B. Neely, Roman A. DiBiase, Lee B. Corbett, Paul R. Bierman, Marc W. Caffee
EARTH AND PLANETARY SCIENCE LETTERS
(2019)
Article
Environmental Sciences
Dacheng Xiao, Yuning Shi, Susan L. Brantley, Brandon Forsythe, Roman DiBiase, Kenneth Davis, Li Li
WATER RESOURCES RESEARCH
(2019)
Article
Geology
Roman A. DiBiase, Michael P. Lamb
Review
Geosciences, Multidisciplinary
Romain Delunel, Fritz Schlunegger, Pierre G. Valla, Jean Dixon, Christoph Glotzbach, Kristina Hippe, Florian Kober, Stephane Molliex, Kevin P. Norton, Bernhard Salcher, Hella Wittmann, Naki Akcar, Marcus Christl
EARTH-SCIENCE REVIEWS
(2020)
Article
Geosciences, Multidisciplinary
Alexander B. Neely, Roman A. DiBiase
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2020)
Article
Geography, Physical
Virginia Marcon, Beth Hoagland, Xin Gu, Wenjing Liu, Jason Kaye, Roman A. DiBiase, Susan L. Brantley
Summary: In the northern Appalachian Mountains, more above-ground biomass grows on shale than on sandstone, potentially due to faster erosion and soil production in shale soils leading to higher phosphorus concentrations in soil and foliage. Sandstones act as 'collectors' trapping nutrients, while shales erode quickly and release phosphorus to ecosystems, resulting in similar biomass on ridgetops.
EARTH SURFACE PROCESSES AND LANDFORMS
(2021)
Article
Geography, Physical
Robin T. Welling, Andrew C. Wilcox, Jean L. Dixon
Summary: This study examined the role of large wood in sediment storage in mixed bedrock-alluvial streams, finding that the volume of wood and sediment storage in these streams is lower than in alluvial streams. Wood is predominantly organized into jams and channel-spanning jams have high levels of storage.
Article
Geosciences, Multidisciplinary
Friedhelm von Blanckenburg, Jan A. Schuessler, Julien Bouchez, Patrick J. Frings, David Uhlig, Marcus Oelze, Daniel A. Frick, Tilak Hewawasam, Jeannie Dixon, Kevin Norton
Summary: The process of rock weathering and element cycling in ecosystems is strongly influenced by erosion rates at different study sites, with weathering rates predominantly controlled by regolith residence time rather than landscape erosion rates. Nutrient elements are intensely recycled in supply-limited environments, while elements are directly taken up from soil and rock in kinetically-limited settings. Biomass growth does not control weathering rates, and there is a deficit in river solute export compared to solute production in regolith at all sites.
AMERICAN JOURNAL OF SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
J. Del Vecchio, R. A. DiBiase, L. B. Corbett, P. R. Bierman, M. W. Caffee, S. J. Ivory
Summary: This study shows that periglacial episodes during the Mid-Pleistocene Transition increased erosion rates in central Appalachia, highlighting the higher efficiency of periglacial erosion processes compared to temperate erosion processes.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geography, Physical
Sarah S. Benjaram, Jean L. Dixon, Andrew C. Wilcox
Summary: This study investigates the relationship between chemical weathering, persistence of soil cover, and topography in two neighboring mountain ranges in western Montana, USA. The findings reveal that weathering intensity is 1.5 times greater in the continuously soil-mantled landscape compared to the bedrock-rich system, and the soil thickness in the bedrock-rich system is roughly half of that in the continuously soil-mantled landscape.
Article
Geography, Physical
Kailey V. V. Adams, Jean L. L. Dixon, Andrew C. C. Wilcox, Dave McWethy
Summary: Interactions between vegetation and sediment in post-fire landscapes are important for sediment connectivity. Previous research focused on vegetation removal but overlooked the effects of coarse woody debris (CWD) added after fires. Our study investigates the impacts of CWD on hillslope sediment storage and highlights its role in limiting rapid sediment movement. We propose a new conceptual model, conduct tilt table experiments, and estimate hillslope sediment storage capacity in a burned catchment using high-resolution topographic data and digitization of downed logs. The results suggest that fire-produced CWD serves as an important source of sediment disconnectivity in catchments and should be incorporated into models of sediment connectivity.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Ecology
Jason Philip Kaye, Susan L. Brantley, Jennifer Zan Williams, David Eissenstat, Kenneth Davis, Li Li, Tess Russo, Roman DiBiase, Henry Lin, Margot Kaye, Yuning Shi, Li Guo, Elizabeth Hasenmueller, Kristen Brubaker, Thomas Adams, Chen Bao, Joanmarie Del Vecchio, Xin Gu, Yuting He, Elizabeth Hoagland, Warren Reed, Ismaiel Szink, Julie Weitzman, Dacheng Xiao, Brandon Forsythe, Benjamin Dillner, Caitlin Hodges, Virginia Marcon, Edward Primka, Perri Silverhart, Qicheng Tang
Article
Geochemistry & Geophysics
Lingyu Zhang, Kristoffer Szilas
Summary: This study presents new petrological and geochemical data for the Narssaq Ultramafic Body (NUB) in the Itsaq Gneiss Complex of SW Greenland. The results indicate that the ultramafic rocks of NUB are not mantle residues, but instead represent crustal cumulates derived from high-Mg magmas.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Rong Xu, Sarah Lambart, Oliver Nebel, Ming Li, Zhongjie Bai, Junbo Zhang, Ganglan Zhang, Jianfeng Gao, Hong Zhong, Yongsheng Liu
Summary: This study investigated the iron isotope compositions of Cenozoic basalts in Southeast China, finding significant variations related to different types of basalts and their respective sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
C. J. Ebinger, Miriam C. Reiss, Ian Bastow, Mary M. Karanja
Summary: The East African rift system is formed above mantle upwellings and the formation of rifts is related to lithospheric thinning and magmatic activity. The amount of splitting varies spatially and the fast axes are predominantly parallel to the orientation of the rifts. Thick lithospheric modules have less splitting and different orientations, which may indicate mantle plume flow. Splitting rotates and increases in strength as it enters the rift zones, suggesting that the anisotropy is mainly present at shallow depths.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Correction
Geochemistry & Geophysics
Ekaterina Rojas-Kolomiets, Owen Jensen, Michael Bizimis, Gene Yogodzinski, Lukas Ackerman
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Robert W. Nicklas, Igor S. Puchtel, Ethan F. Baxter
Summary: Oxygen fugacity is a fundamental parameter for understanding redox processes in igneous systems. This study compares the Fe-XANES oxybarometry method with the V-in-olivine method for evaluating fO(2) in MORB lavas. The results show that the V-in-olivine method is not applicable to samples with low MgO content, and that the majority of Archean komatiite sources have lower fO(2) than modern MORB.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Chunfei Chen, Stephen F. Foley, Sebastian Tappe, Huange Ren, Lanping Feng, Yongsheng Liu
Summary: The volatile components CO2 and H2O play a major role in mantle melting and heterogeneity. In this study, Ca isotopes were used to trace the lithological heterogeneity in alkaline magmatic rocks. The results revealed the presence of K-richterite and carbonate components as the source of alkaline magmas with low delta 44/40Ca values. These findings highlight the importance of Ca isotopes as a robust tracer of lithological variation caused by volatiles in the Earth's upper mantle.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Timothee Jautzy, Gilles Rixhon, Regis Braucher, Romain Delunel, Pierre G. Valla, Laurent Schmitt, Aster Team
Summary: Although the current approach to estimate catchment-wide denudation rates using only 10Be concentrations has made significant progress in geomorphology, this study argues for the inclusion of 26Al measurements and testing of steady-state assumptions in slow eroding, formerly glaciated landscapes. The study conducted measurements of both 10Be and 26Al in stream sediments from the Vosges Massif in France and found that elevation, slope, channel steepness, and precipitation were the primary factors controlling denudation rates. The study also revealed a significant relationship between the extent of past glaciation and the cosmogenic (un-)steadiness in the stream sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Erik van der Wiel, Douwe J. J. van Hinsbergen, Cedric Thieulot, Wim Spakman
Summary: Numerical models of Earth's mantle dynamics can predict the vigour and mixing of mantle flow, and the average slab sinking rates are an unexplored parameter that can provide intrinsic information on these characteristics. Through numerical experiments, it has been found that slab sinking rates are strongly correlated with mantle convection and mixing, and may explain geochemical observations from hotspot volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)