Geochemistry of Barail sandstone in Champhai, Mizoram: Implications on provenance and weathering history

Hauhnar, Malsawmtluangkima; Lalnunmawia, Jimmy; Dawngliana, Orizen M. S.

doi:10.1007/s12040-020-01515-9

Cited by 5 publications

(1 citation statement)

References 38 publications

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“…During sedimentation process, these rocks acquire different bedding planes or lamination and the study area is located in active zone of earthquake which further increases the formation of fractures in the hydrogeology (SAPCC, 2017; Rao, 2018; Hauhnar et al, 2021). The properties and the dip orientation of theses laminations have a signi cant effect on the properties of the rock in terms of stability and strength (Hauhnar et al, 2021;Biswas et al, 2023). They are greatly affected by motion of water in the presence of abrasive objects such as clay and sand.…”

Section: Introductionmentioning

confidence: 99%

Effect of Faults and Fractures on Springwater Quality and Discharge of West Phaileng, Mizoram

Sailo,

Vanlalhruaia

2024

Preprint

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The North Eastern part of India compromises of hilly slopes and ridges. The main source of water is of river, streams, rainfall and springs. Due to change in environmental variables, many springs and streams are drying up as discharge decreases. A lithological study shows the area to consist of clay, silt, shale, siltstone and sandstone where porosity is low leading to low yielding capacity. Hydrogeological and geochemical composition studied represents the water within this region as immature and major ions composition shows Na+>Mg2+>Ca2+>Mn2+>Fe2+>K+ in cations and anoins HCO3->Cl->SO42->NO3->PO43-. The mineral saturation indices constructed using PHREEQC showed supersaturation with dolomite, siderite and vivianite. The hydrogeochemical formation mechanism using Gibbs Diagram and Piper diagram suggested rock weathering type. Principal Component Analysis (PCA) was performed as a multivariate analysis to determine the correlation between different components of hydrogeochemistry. The assessment of springwater quality using water quality index (WQI) shows good quality for most of the samples. A conceptual recharge model was the constructed anticipating mountain front recharge as major recharge of spring water. The springwater hydrograph was modelled using Maillets. It was observed that two types of flow, firstly the initial larget slope corresponding to conduit flow and secondly smaller slope to the diffuse flow was system. Thus the main mechanism of recharge in the hilly regions of West Phaileng was attributed to the mountain front recharge which is influenced by faults and fractures.

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Section: Introductionmentioning

confidence: 99%

Effect of Faults and Fractures on Springwater Quality and Discharge of West Phaileng, Mizoram

Sailo,

Vanlalhruaia

2024

Preprint

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Petro-geochemical Signatures as Evidences for Tectonic Setting, Palaeoweathering and Provenance of Eocene Kopili Sandstones, Meghalaya, Northeast India

Boruah

Pandey

2023

Journal of the Geological Society of India

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Spectacularly preserved yet least studied middle to late Eocene Kopili Formation in parts of East Jaintia Hills district, Meghalaya has been documented to understand the provenance, tectonic setting and palaeoweathering employing petrological and geochemical attributes. The Kopili Formation is characterized by alternations of fossiliferous marl-splintery grey to black shale-siltstone and fine to medium grained ferruginous sandstone with occasional coal streaks. Petrographically, Kopili sandstone has been grouped into two categories i.e. subarkose and sublitharenite. Geochemically, Kopili sandstone possesses high SiO2 and relatively low Al2O3 and Fe2O3 confirming to the modal composition Q72.70 F6.57 RF7.01 CT3.12 Mx2.28 M2.07 HM1.82. These are quartz-rich (SiO2 75.96%) clean sandstone depicting strong negative correlation of SiO2 with rest of the major oxide except for CaO which is relatively weak. High SiO2 is in conformity with quartz enrichment (73.50%), does indicate a passive (atlantic type) continental margin set up for the deposition of Kopili Formation. Neo-development of quartz and feldspar in parts reflect high degree of diagenesis. Chemical indices like CIA, CIW, PIA and ICV reveal intense weathering under semi-arid to semi-humid climatic conditions. Besides minor contributions from continent interior, sediments were largely derived from recycled orogen involving rhyolitic / granitic sources containing plagioclase feldspars in the range of An0-An70 as evident from geochemical attributes.

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Variability of chemical weathering from 7000 years ago to the present in a basin influenced by mining activity in central Mexico

Rueda-Garzon,

Miranda-Avilés,

Carrillo-Chavez

et al. 2024

Environ Earth Sci

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Geochemistry of Barail sandstone in Champhai, Mizoram: Implications on provenance and weathering history

Cited by 5 publications

References 38 publications

Effect of Faults and Fractures on Springwater Quality and Discharge of West Phaileng, Mizoram

Effect of Faults and Fractures on Springwater Quality and Discharge of West Phaileng, Mizoram

Petro-geochemical Signatures as Evidences for Tectonic Setting, Palaeoweathering and Provenance of Eocene Kopili Sandstones, Meghalaya, Northeast India

Variability of chemical weathering from 7000 years ago to the present in a basin influenced by mining activity in central Mexico

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