Clay mineral composition of upland soils and its implication
Introduction Clay minerals are among the essential components of the solid soil phase, and their composition and relative content can affect many physical and Making use of unique mineralogical combinations in soils located in the East Usambara Mountains of Tanzania, we disentangled the contribution of clay-sized Iron oxides and aluminous clays selectively control soil Nature
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Evaluating the contribution of hydrothermal fluids and clay minerals
The results of mineral phase analysis for REY-poor and REY-rich sediments in this study show that with an increase in REY contents, the amount of Title history ISSN: 0009-8558 (Print),1471-8030 (Online) Editors: Professor George Christidis,and Professor Chun Hui Zhou Editorial board Clay Minerals Journal of Fine Particle Science publishes Clay Minerals Cambridge Core
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Contribution and Coupling Effect of Adsorption on Clay Minerals
In this study, the pore characteristics and the factors of maximum methane adsorption capacity (MAC) of mudstone in the early diagenetic stage (EDS) and the Transformation of Clay Minerals during Weathering. Kaolinite group minerals are the most abundant clay minerals throughout the entire weathering profile, Physicochemical Variation of Clay Minerals and Enrichment
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Genesis of clay minerals and its insight for the formation of
Based on the thin section observations and SEM images, the authors identified five types of clay minerals (talcs, T/S, illites, smectites and I/S), and mineral Clay minerals are a diverse group of hydrous layer aluminosilicates that constitute the greater part of the phyllosilicate family of minerals. They are commonly defined by Clay Mineral an overview ScienceDirect Topics
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Clay minerals in surface sediments of the Pearl River
These variations indicate the contribution of major kaolinite, lesser illite and chlorite, and very scarce smectite to the northern South China Sea from the Pearl River drainage basin. The maximum contribution of clay minerals from the Pearl River is 72% to the northern margin and only 15% to the northern slope of the South China Sea.The mineral fraction analysis shows that the amount of clay mineral kaolinite exhibits a significant positive correlation with ΣREY contents (Fig. 4 a, b), combined with the positive relationship between Al 2 O 3 (mainly incorporated in clay minerals in our samples) and ΣREY contents (Fig. 5 d), suggesting clay minerals probably played anEvaluating the contribution of hydrothermal fluids and clay minerals
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Effects of types and content of clay minerals on reservoir
The occurrence of clay minerals has crucial effects on pore structures, that is the pore-filling clays has indiscernible contribution to the storage space, like in the Lucaogou shale, but those developing along the shale laminae can improve the storage capacities to form inter-granular pores and micro-fractures such as in Chang 7 Member The first clay mineral record from European loess at an orbital-scale-resolution. • Mainly detrital origin of the clay minerals in the loess-paleosol sequence. • Minor contribution of Carpathian Basin material to Greenland glacial dust. • Illite crystallinity and chlorite ratio are sensitive weathering proxies. •Clay mineralogy of the Stari Slankamen (Serbia) loess
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(PDF) A high-resolution clay mineralogical record in the
The clay minerals in core SCS18-1 are all terrigenous clastic sediments, and the influence of diagenesis can be ignored. Numerous studies have shown that the Pearl River, Taiwan, and Luzon are theClay mineral analyses indicate that the Mekong River is the predominant contributor of clay minerals to the southern SCS, with minor contributions from Luzon and/or Palawan and northern Borneo. The contribution from the Luzon and/or Palawan arc to the southern SCS is semi-quantitatively evaluated as 20% and is mainly smectite.Sediment distribution and dispersal in the southern
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(PDF) Sediment distribution and dispersal in the
Clay mineral analyses indicate that the Mekong River is the predominant contributor of clay minerals to the southern SCS, with minor contributions from Luzon and/or Palawan and northern Borneo.Knowledge of how interactions of clay minerals and extracellular enzymes (EEs) influence organic matter turnover in soils are still under discussion. We studied the effect of different montmorillonite contents on EE activities, using two experiments—(1) an adsorption experiment with a commercially available enzyme (α-glucosidase) and (2) an Control of Soil Extracellular Enzyme Activities by Clay Minerals
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Iron oxides and aluminous clays selectively control soil Nature
Clay minerals and pedogenic metal (oxyhydr)oxides are the most reactive soil mineral constituents controlling the long-term persistence of organic carbon (OC) in terrestrial ecosystems. HoweverIn the Mănăila alpine area, the soil layer developed in situ on top of the sericite-schists, which belong to the Tulghes 3 metamorphic unit. The aim of the present work was to determine the degree of soil formation using both mineralogical and geochemical exploration methods. XRD, FTIR and SEM-EDS results showed that the soil Minerals Free Full-Text Mineralogical and Geochemical
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Clay and Clay Mineral Definition SpringerLink
Clay science is multidisciplinary with the object of study both clay and clay minerals. It receives important contributions from other sciences or disciplines, such as mineralogy, crystallography, chemistry, In this study, the pore characteristics and the factors of maximum methane adsorption capacity (MAC) of mudstone in the early diagenetic stage (EDS) and the contribution rate of clay mineral (CM) adsorption were analyzed. In addition, the adsorption coupling effect of CM and organic matter (OM) was discussed. Studies have shown that Contribution and Coupling Effect of Adsorption on Clay Minerals
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Wettability of different clay mineral surfaces in shale:
In establishing the model, we first established an oil box (60 Å × 60 Å × 40 Å) filled with liquid hydrocarbons (Fig. 2 a) and then a water box containing 300 water molecules (20.8 Å × 20.8 Å × 20.8 Å) (Fig. 2 b) and a clay mineral with a horizontal surface (Fig. 2 c).The basis for selecting the number of water molecules is to try to choose 1. Introduction. Recent studies (Hu et al., 2021; Liu et al., 2021) have shown that limestone marl alternations (LMAs) in the first member of the Middle Permian Maokou Formation in the southeastern Sichuan Basin are considered to be a set of carbonate source rock gas reservoirs.Generally, LMAs are rich in clay minerals, and in Genesis of clay minerals and its insight for the formation of
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Sediment sources and their contribution along northern
In the Okinawa Trough, contribution of various sources is estimated using three extrapolated equations of four clay minerals in three end members (Dou et al., 2010). Along the northern SCS coast, annual sediment discharge of the Hanjiang and Jianjiang Rivers is 7.6 and 2.0 Mt, respectively (Zhao et al., 1999).The maximum contribution of clay minerals from the Pearl River is 72% to the northern margin and only 15% to the northern slope of the South China Sea. In both glacials and interglacials(PDF) Clay minerals in surface sediments of the Pearl River
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Editorial for Special Issue “Clays, Clay Minerals, and Geology”
Introduction. Sedimentary rocks covering most of the Earth’s crust are mainly composed of clays, making clay minerals widespread globally. Clay minerals are mainly derived from the interaction of the surface of the Earth’s crust with the atmosphere and hydrosphere, without neglecting the contribution of organic matter and bio-agents APPLIED CLAY SCIENCE 0169-1317 23,333 5.467 5.414 Q1 1.349 CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 0010-7999 21,219 4.076 4.527 Q1 1.064 MINERALS ENGINEERING 0892-6875 科学网—矿物学 (MINERALOGY) 30种SCIE期刊分区 孙颉
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Differential adsorption of clay minerals: Implications for
The interactions between clay minerals and organic matter, specifically adsorption, are widely recognized as a crucial mechanism for promoting the preservation of organic matter within sedimentary environments. However, the contribution of clay minerals in providing sufficient Mg 2+ for dolomitization may be limited (Li et al., 2016). This paper reports clay mineralogical data of surface sediments in nine bays/harbors along the northern-most part of SCS, all located in the coast of Guangdong Province, South China (Fig. 1).The aims of this study are (1) to investigate the spatial variations of clay minerals in surface sediments, (2) to identify the dominant sediment Sediment sources and their contribution along northern
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