Imaging and locating paleo-channels using geophysical data from meandering system of the Mun River, Khorat Plateau, Northeastern Thailand

Nimnate, Parisa; Thitimakorn, Thanop; Choowong, Montri; Hisada, Ken‐ichiro

doi:10.1515/geo-2017-0051

Cited by 18 publications

(9 citation statements)

References 28 publications

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“…The Mun River Basin is mainly occupied by clastic sedimentary rocks of Mesozoic continental red beds known as Khorat Group, which consists of siltstone, sandstone, conglomeritic sandstone and shale (Nimnate et al, 2017). For example, the Khorat Plateau is occupied by Triassic sandstones with scattered lava flows (Carling, 2009).…”

Section: Sampling and Analytical Proceduresmentioning

confidence: 99%

Effects of soil pH and texture on soil carbon and nitrogen in soil profiles under different land uses in Mun River Basin, Northeast Thailand

Zhou

Han

2019

PeerJ

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Soil carbon and nitrogen are essential factors for agricultural production and climate changes. A total of 106 soil samples from three agricultural lands (including two rice fields and one sugarcane field) and four non-agricultural lands (including two forest lands, one wasteland and one built-up land) in the Mun River Basin were collected to determine soil carbon, nitrogen, soil pH, soil particle sizes and explore the influence of pH and soil texture on soil C and N. The results show that total organic carbon (TOC) and nitrogen (TON) contents in topsoil (TOC: 2.78 ~ 18.83 g kg−1; TON: 0.48 ~ 2.05 g kg−1) are much higher than those in deep soil (TOC: 0.35 ~ 6.08 g kg−1; TON: <0.99 g kg−1). In topsoil, their contents of forest lands and croplands (TOC: average 15.37 g kg−1; TON: average 1.29 g kg−1) are higher than those of other land uses (TOC: average 5.28 g kg−1; TON: average 0.38 g kg−1). The pH values range from 4.2 to 6.1 in topsoil, and with increase in soil depth, they tend to increase and then decrease. Soil carbon, nitrogen and the C/N (TC/TN ratio) are negatively correlated with soil pH, demonstrating that relatively low pH benefits the accumulation of organic matter. Most soil samples are considered as sandy loam and silt loam from the percentages of clay, silt and sand. For soil profiles below 50 cm, the TOC and TON average contents of soil samples which contain more clay and silt are higher than those of other soil samples.

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Section: Sampling and Analytical Proceduresmentioning

confidence: 99%

Effects of soil pH and texture on soil carbon and nitrogen in soil profiles under different land uses in Mun River Basin, Northeast Thailand

Zhou

Han

2019

PeerJ

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“…The lateral resistivity changes in the Cuatrociénegas sector indicate the possible upward and downward blocks through normal faults. Instead of downward blocks, there may also be fractured limestones (Robert et al, 2011;Demirel et al, 2018) or paleo-channel zones (dissolution zones; Nimnate et al, 2017). Low resistivity values in limestone (15-30 Ωm) indicate water saturation, and therefore, indicate the location of the carbonate aquifer (Figures 4 and 5).…”

Section: Cuatrociénegas Sectormentioning

confidence: 99%

“…Particularly, in transect 4, slightly vertical block movements are inferred from the interpreted normal faults (Figure 7). The subsided blocks can indicate highly fractured rocks or a paleo-channel zone (Robert et al, 2011;Nimnate et al, 2017;Demirel et al, 2018).…”

Section: Nueva Rosita Sectormentioning

confidence: 99%

Using electrical resistivity tomography to evaluate the relationship between groundwater potencial and tectonism in northeast Mexico

Batista-Rodríguez¹,

Pérez-Flores²,

Carmenates³

et al. 2021

revmexcg

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The relationship between groundwater potential and tectonic conditions in three sectors of clastic and carbonated sedimentary rocks of northeastern Mexico was identified using electrical resistivity tomography performed in seven transects. The electrical resistivity data were measured using Schlumberger, Wenner and dipole-dipole arrays of the electrodes. Subsequently, the data obtained were combined to carry out a 2D inversion. From interpretation of the electrical resistivity tomography data, several aquifers are located and characterized within varying thicknesses of conglomerates, sandstones and limestones. Additionally, fractures, faults and boundaries between rock types are identified in the obtained 2D models. These structural elements indicate that the aquifers have a strong relationship with the tectonism of the region. Depressed and uplifted blocks are generated through normal faults. The orientations of the inferred fractures and faults fit the structural characteristics of the study region. The aquifers are classified as semi-confined and confined. In clastic materials, these aquifers are classified as granular, while in limestone, they are mainly fractured. Fracture zones that connect most of the aquifers and connect the aquifers with the ground surface are also identified using electrical resistivity tomography. These zones can constitute the main recharge (including contamination) paths to the aquifers. This pollution can be related to livestock and industrial activities, as well as agriculture and mining in the region. Using these results, water wells were drilled to corroborate the identified aquifers.

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“…The rock basement of the Mun River Basin is the so-called Khorat Group, which is mainly composed of sandstone, siltstone, shale, and conglomeritic sandstone ( Figure 1). The rock basement is mainly covered by the unconsolidated Quaternary alluvial sediment [21][22][23].…”

Section: Study Areamentioning

confidence: 99%

Geochemical Distribution Characteristics of Rare Earth Elements in Different Soil Profiles in Mun River Basin, Northeast Thailand

et al. 2020

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Exploring the distributions of rare earth elements (REEs) in soil profiles is essential to understanding how natural and anthropogenic factors influence the geochemical behaviors of REEs. This study aimed to learn about the distribution characteristics of REEs in soils, including their fractionation and enrichment, and to explore the influence of soil pH and soil organic carbon (SOC) on REEs. One hundred and three samples were collected from six soil profiles under different land uses (paddy field: T1, T3; forest land: T2, T6; wasteland: T4; building site: T5) in the Mun River Basin, Northeast Thailand. The average total REE contents (∑REE) are much lower (<80 mg kg−1) than that of Earth’s crust (153.80 mg kg−1) in soil profiles T2, T3, T4, and T6. The contents of REEs tend to increase slightly with depth in all soil profiles. The ratios of (La/Yb)N range from 0.35 to 0.96 in most samples, indicating that the enrichment of heavy REEs (HREEs) relative to light REEs (LREEs) is the main fractionation pattern. Samples from profile T2 show relatively obvious negative Ce anomalies (0.55–0.78) and positive Eu anomalies (1.41–1.56), but there are almost no anomalies of Ce and Eu in other soil profiles. Enrichment factors of LREEs (EFLREEs) range from 0.23 to 1.54 and EFHREEs range from 0.34 to 2.27, which demonstrates that all soil samples show no LREE enrichment and only parts of samples show minor HREE enrichment. Soil organic carbon (SOC) contents positively correlate with the enrichment factors of REEs (EFREE) in soil profiles T1 (R = 0.56, p < 0.01) and T6 (R = 0.71), while soil pH values correlate well with EFREE in soil profiles T2 (R = 0.75) and T4 (R = −0.66, p < 0.01), indicating the important influence of soil pH and SOC on the mobility of REEs in some soil profiles.

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Imaging and locating paleo-channels using geophysical data from meandering system of the Mun River, Khorat Plateau, Northeastern Thailand

Cited by 18 publications

References 28 publications

Effects of soil pH and texture on soil carbon and nitrogen in soil profiles under different land uses in Mun River Basin, Northeast Thailand

Effects of soil pH and texture on soil carbon and nitrogen in soil profiles under different land uses in Mun River Basin, Northeast Thailand

Using electrical resistivity tomography to evaluate the relationship between groundwater potencial and tectonism in northeast Mexico

Geochemical Distribution Characteristics of Rare Earth Elements in Different Soil Profiles in Mun River Basin, Northeast Thailand

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