Thermal origin of continental red beds in SE China: An experiment study

Jiang, Lianting; Chen, Guoneng; Grapes, Rodney; Peng, Zhenwei

doi:10.1016/j.jseaes.2015.01.019

Cited by 18 publications

(12 citation statements)

References 29 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The deviator stress 1 -3 was obtained from the ratio of the applied axial load after the designated hydrostatic confining pressure was reached for the cross-sectional area of these specimens. The maximum principal stress 1 can also be calculated by the summation of the deviator stress 1 -3 and the confining stress 3 .…”

Section: Mechanical Testsmentioning

confidence: 99%

“…The Sichuan Province belongs to typical inland basin known as "Red Basin," and the elevations of the inland basin are about 200 m to 750 m with hilly regions as the main geomorphic units. It is generally believed that the iron element in rocks is oxidized to trivalent iron due to the strong oxidation, which is the reason of forming the red appearance [2,3]. Among these areas, the basis formation condition of red-bed rocks is the proper geomorphological environment with dry and hot paleoclimate, weathering conditions, and rich sediments source from mountains.…”

Section: Introductionmentioning

confidence: 99%

“…Among these areas, the basis formation condition of red-bed rocks is the proper geomorphological environment with dry and hot paleoclimate, weathering conditions, and rich sediments source from mountains. The different forming conditions, tectonic activity, and climate lead to the differences of the red-bed rocks in colors, microstructure, mineral composition, weathering degree, and others [3]. The widely distributed red-bed rocks have special mechanical properties (especially for the soft rocks) and are often encountered during the construction process of civil engineering.…”

Section: Introductionmentioning

confidence: 99%

“…The lithologies of red beds are mainly sandstone, siltstone, silty mudstone, argillaceous siltstone, shale, or claystone. When they encounter water, the red beds commonly develop many engineering problems such as erosion, seepage, and softening [2,3,5]. With the development of engineering construction in the red-bed areas, more researchers begin to pay more attention to the physical and mechanical properties of soft rocks [2,[5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An Experimental Study on the Water-Induced Strength Reduction in Zigong Argillaceous Siltstone with Different Degree of Weathering

Yang¹,

Zhou²,

Xu³

et al. 2016

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The water-softening property of soft rocks is a key problem in geotechnical engineering. A typical red-bed soft rock (the Zigong argillaceous siltstones) with different weathering degree is selected as an example to study the water-softening property and the influence of degree of weathering. A series of mechanical and microstructure tests are carried out to analyze the weathering characteristics and mechanism of the Zigong argillaceous siltstones. The results of mechanical experiments reveal that the water content and the weathering degree of rock specimens both have a weakening effect on the compressive and shear strengths. According to the results of present microstructure tests, the mechanical properties of the Zigong argillaceous siltstones are closely correlated with their physical properties, including internal microstructure and material composition for highly weathered rocks or moderately weathered rocks (in both natural and saturation conditions). Finally, experimental results indicate that the changes of microstructure and internal materials are two main factors that influence rock strength parameters after contacting with water and that these properties reflect the rock weathering degree. In a word, when red-bed soft rocks are encountered in geotechnical engineering, special attention should be paid to presence of water.

show abstract

Section: Mechanical Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Experimental Study on the Water-Induced Strength Reduction in Zigong Argillaceous Siltstone with Different Degree of Weathering

Yang¹,

Zhou²,

Xu³

et al. 2016

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…Continental red beds comprise a wide range of sedimentary facies, representing the whole spectrum of non-marine depositional environments: alluvial fans, river floodplains, deserts, lakes and deltas 4 . Although previous studies have suggested that red bed sediments in SE China are related to hot and arid climate conditions during deposition 5–8 , the occurrence of hematite is of no paleoclimatic significance because red beds are known to form in both arid and moist tropical climates 4,9,10 , even a possible thermal origin 11 .…”

Section: Introductionmentioning

confidence: 99%

The Spatial Patterns of Red Beds and Danxia Landforms: Implication for the formation factors–China

Yan

Hua

Zhang

et al. 2019

Sci Rep

View full text Add to dashboard Cite

This research examined the distribution features of red beds and 1,100 Danxia landform sites across China, while probing the relationship between these spatial patterns and geological elements. This study is based on geological and tectonic maps of China. ArcGIS software was used to process the adjacent index, then perform a spatial analysis of Danxia landforms and red beds, and a coupling analysis of Danxia landforms and red beds with tectonics. Based on a point pattern analysis of Danxia landforms, the adjacent index is 0.31, and the coefficient of variation verified by Thiessen polygon reaches 449%. These figures reflect the clustered distribution pattern of the Danxia landforms. Across the country, Danxia landforms are concentrated into three areas, namely, the Southeast China region, the Sichuan Basin region and the Qilian-Liupan region. The exposure of red beds covers 9.16 × 105 km2, which accounts for 9.5% of the total land area of China. With this research background, the geological elements of tectonics and their effects on the distribution, number, and spatial pattern of Danxia landforms and red beds were analyzed.

show abstract

Clay mineral diagenesis and red bed colouration: A SEM study of the Gercus Formation (Middle Eocene), northern Iraq

et al. 2020

View full text Add to dashboard Cite

Detailed high magnification scanning electron microscopic (SEM) study supported by petrographic, mineralogical, and geochemical (major and trace element) analysis of the Gercus Formation clastics (sandstones and mudstones) from northern Iraq shows that the main authigenic components are carbonate (dolomite and calcite), clay and haematite minerals with rare quartz, feldspar, and gypsum. The carbonates and sulphate minerals were the main early diagenetic phase in the Gercus Formation and were produced from the post-depositional breakdown of ferromagnesian minerals. These latter are unstable in the oxidizing conditions of the interstitial waters below the desert surface. The main authigenic clay minerals are illite, illite-smectite, and palygorskite. The presence of tangential illite coating and illite-smectite in the sandstones can be related to their desert origin. Palygorskite is associated with dolomite, calcite, and haematite. These mineral associations may indicate early diagenesis in evaporitic and saline conditions. It also confirms the syndepositional and diagenetic origin for the clayey-haematitic matrix and pigment of the Gercus Formation. Haematite occurs as extremely fine-grained crystals mixed with authigenic clays and exhibits a range of shapes (e.g., fibrous to lath-shaped aggregates, small spherical grains, specularite crystals, blade-shaped, rosette-like clusters, and a lump of bright spheroidshaped haematite/goethite). The arid to semi-arid conditions together with the oxidizing and alkaline interstitial water favoured the noted mineral assemblage within the Gercus Formation.

show abstract

Thermal origin of continental red beds in SE China: An experiment study

Cited by 18 publications

References 29 publications

An Experimental Study on the Water-Induced Strength Reduction in Zigong Argillaceous Siltstone with Different Degree of Weathering

An Experimental Study on the Water-Induced Strength Reduction in Zigong Argillaceous Siltstone with Different Degree of Weathering

The Spatial Patterns of Red Beds and Danxia Landforms: Implication for the formation factors–China

Clay mineral diagenesis and red bed colouration: A SEM study of the Gercus Formation (Middle Eocene), northern Iraq

Contact Info

Product

Resources

About