Development and Evolution of the Size of Polygonal Fracture Systems during Fluid-Solid Separation in Clay-Rich Deposits

Lopez, Téodolina; Antoine, Raphaël; Darrozes, José; Rabinowicz, M.; Baratoux, D.

doi:10.1007/s12583-017-0814-9

Cited by 4 publications

(3 citation statements)

References 89 publications

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“…Also, polygonal structures of hectometric to kilometric size have been found independently of any tectonic event on clastic sediments. They are interpreted as compaction phenomena in clay layers (Lopez et al, 2018). These clay layers could be located in the sediment filling of the lagoon in case of continental sediment supply.…”

Section: Reticulated Basins and Antecedent Karst Surfacesmentioning

confidence: 98%

The lagoon geomorphology of pearl farming atolls in the Central Pacific Ocean revisited using detailed bathymetry data

Andréfouët

Genthon

Pelletier

et al. 2020

Marine Pollution Bulletin

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Section: Reticulated Basins and Antecedent Karst Surfacesmentioning

confidence: 98%

The lagoon geomorphology of pearl farming atolls in the Central Pacific Ocean revisited using detailed bathymetry data

Andréfouët

Genthon

Pelletier

et al. 2020

Marine Pollution Bulletin

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“…Clay-rich deposits, in continental conditions, are characterized by the development of desiccation cracks that form during layer contraction and dewatering [70][71][72]. Width of desiccation cracks ranges from a few centimeters from experiment in slurry [73][74][75][76] to~30 cm in natural clay deposits [71,77] with rich content in smectite.…”

Section: Influence Of the Surface Permeability Of Claysmentioning

confidence: 99%

Investigation of Short-Term Evolution of Soil Characteristics over the Lake Chad Basin Using GRACE Data

Lopez

Ramillien

Antoine³

et al. 2018

Remote Sensing

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In the Sahelian region, the West African Monsoon (WAM) is an important phenomenon for land water storage evolution, as demonstrated by The Gravity Recovery and Climate Experiment (GRACE) estimations. The Monsoon leads to an annual increase of the water mass. However, GRACE data also displays the existence of a semi-annual cycle whose its origin is still uncertain. This cycle is characterized by a gain of water mass at the beginning of the dry season. In this study, 10-days GRACE data are used to understand the characteristics of this semi-annual cycle. Investigations of the rainfall events, rivers discharge peaks, and the Lake Chad water level variations suggest that they are not at the origin of this cycle. However, MODIS evapotranspiration data display an increase each 6 months, during the rainy season, and at the same time as the semi-annual cycle estimated by GRACE. This increase occurs in regions where the amount of clays at the surface exceeds 30%. The link between both signals and the proportion of clays at the surface leads us to the conclusion that the seasonal variation of the vertical permeability of clays controls the amount of water present in the unsaturated zone.

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“…volume decrease through solidi cation (Mattson et al 2011;Almqvist et al 2012;Bosshard et al 2012). Other mechanisms such as evaporation and dehydration formed joints in clay sediments (Weinberger 1999(Weinberger , 2013Sletten et al 2003;Lopez et al 2018) and cornstarch (Müller 1998a(Müller , 1998b(Müller , 2001;…”

mentioning

confidence: 99%

Columnar joints in intermediate and felsic volcanic rocks

2023

Preprint

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Columnar joints are among the most spectacular structures in various types of igneous rocks. In contrast to basaltic rocks, very few studies systematically examine this structure in other types of igneous rocks. Here, I focus on columnar joints in intermediate and felsic volcanic rocks (IFVRs) which outcrop in eastern and southern China through detailed field observations and measurements. The interpretations and analyzed results show that: (1) Columnar joint is not rare in IFVRs which have similar internal structures to columnar jointed basaltic lavas, but the high viscosity usually inhibits their formation potential of columnar joints in intermediate and felsic lavas (ratio of formation probabilities between IFVRs and basalts is ~ 1/29 in eastern and southern China). (2) Columnar joints in IFVRs usually display curved structure that are likely formed by the slightly downslope of solidified top part and the local rotation of the isotherms, which can be classified as entablature. (3) The largely variable size (side length = ~ 10–161 cm) and ordering (Hexagonality Index = ~ 0.68–1.5) of columns in IFVRs are not directly associated with their major element compositions, but most possibly are controlled by their emplaced styles, surrounding environments and rock textures. (4) High effusion rates of lavas and/or pyroclastic flows emplaced in flat areas (i.e., Basin floor, canyon, lava lake, caldera interior) through stagnant cooling processes (~ 1.4–35°C/h) would be the key mechanisms to form columnar joints in IFVRs.

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Development and Evolution of the Size of Polygonal Fracture Systems during Fluid-Solid Separation in Clay-Rich Deposits

Cited by 4 publications

References 89 publications

The lagoon geomorphology of pearl farming atolls in the Central Pacific Ocean revisited using detailed bathymetry data

The lagoon geomorphology of pearl farming atolls in the Central Pacific Ocean revisited using detailed bathymetry data

Investigation of Short-Term Evolution of Soil Characteristics over the Lake Chad Basin Using GRACE Data

Columnar joints in intermediate and felsic volcanic rocks

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