Diagenesis of organic matter and fine clay minerals: a comparative study

1978 ◽  
Vol 42 (8) ◽  
pp. 1181-1197 ◽  
Author(s):  
T.G. Powell ◽  
A.E. Foscolos ◽  
P.R. Gunther ◽  
L.R. Snowdon
Keyword(s):  
Organic Matter ◽  
Comparative Study ◽  
Clay Minerals ◽  
Fine Clay

CHEMICAL AND MINERALOGICAL CHARACTERISTICS OF CUTANS FROM B HORIZONS OF THREE MANITOBA SOILS

1971 ◽  
Vol 51 (2) ◽  
pp. 221-228 ◽  
Author(s):  
G. J. BEKE ◽  
M. A. ZWARICH
Keyword(s):  
Organic Matter ◽  
Clay Minerals ◽  
Total Nitrogen ◽  
Mineralogical Characteristics ◽  
Fine Clay ◽  
Extractable Iron ◽  
Gray Luvisol

Cutans separated from the B horizon of an Orthic Black, an Orthic Dark Gray, and an Orthic Gray Luvisol soil from southwestern Manitoba had higher total nitrogen and dithionite-extractable iron contents than their corresponding horizon samples. The cutans from the Bt2 horizon of the Orthic Gray Luvisol profile contained, in addition, considerably larger amounts of organic matter and fine clay, and had a slightly different distribution of clay minerals than the horizon sample. Within each soil, the differences between the properties of the cutans and those of the bulk samples were generally small. This was attributed to the method employed to isolate the cutanic material and to the impossibility of collecting all cutans from the samples.

Particle Size Effects on Concentration of Metals in Lake Erie Bottom Sediments

1984 ◽  
Vol 19 (1) ◽  
pp. 27-36 ◽  
Author(s):  
Alena Mudroch
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Clay Minerals ◽  
Surface Sediment ◽  
Size Effects ◽  
Lake Erie ◽  
Size Fraction ◽  
Mineralogical Composition ◽  
Major Elements ◽  
Sediment Samples

Abstract Surface sediment samples obtained at the offshore and nearshore area of Lake Erie were separated into eight different size fractions ranging from <2 µm to 250 µm. The concentration of major elements (Si, Al, Ca, Mg, K, Na, Fe, Mn and P), metals (Zn, Cu, Cr, Ni, V, Co and Pb) and organic matter was determined together with the mineralogical composition and morphology of the particles in each size fraction. The distribution of the metals in the offshore sediment was bimodal with the majority of the metals divided between the 63 to 250 um size fraction which also contained the highest concentration of organic matter (about 20%) and the <4 µm fraction containing up to 60% of clay minerals. However, the metals in the nearshore sediment were associated mainly with the clay minerals.

CLAY ILLUVIATION IN SOME ORTHIC PODZOLS OF EASTERN CANADA

1965 ◽  
Vol 45 (2) ◽  
pp. 127-138 ◽  
Author(s):  
J. E. Brydon
Keyword(s):  
Organic Matter ◽  
New Brunswick ◽  
Iron Oxides ◽  
Clay Content ◽  
Granular Structure ◽  
Charge Component ◽  
Eastern Canada ◽  
Free Iron ◽  
Fine Clay ◽  
Ph Dependent

The Arago, Barney, and Holmesville soils, Podzols from Quebec, Nova Scotia, and New Brunswick, respectively, each had friable Bfh horizons with moderate granular structure, and with organic matter and free Fe2O3 contents greater than the Ae and C horizons. The Arago and Holmesville had thin Bhft horizons containing over 10% organic matter and 5% free iron oxides. The C horizons of these two soils had some features characteristic of fragipans.The B horizons of the three soils had a high "pH-dependent charge component" in the C.E.C. values. The "permanent charge component" was similar throughout the Arago profile except for the Bhft horizon where clay accumulation had occurred.Translocation of clay from the Ae to the upper B horizons was indicated by the twofold increase in clay content and the relative enrichment of fine clay in the B horizons. Removal of free iron affected the clay contents differently in the different: horizons but the maximum clay content in the upper B horizons remained. The definitions of Orthic Podzols, Textural Podzols, and t horizons should be re-examined.

Fractionation of natural algal organic matter and its preservation on the surfaces of clay minerals

2021 ◽  
Vol 213 ◽  
pp. 106235
Author(s):  
Longmeng Wei ◽  
Hongling Bu ◽  
Yanfu Wei ◽  
Honghai Wu ◽  
Gehui Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Clay Minerals ◽  
Algal Organic Matter

Comparative Study of Valency-Based Topological Indices for Tetrahedral Sheets of Clay Minerals

2021 ◽  
Vol 18 ◽  
Author(s):  
Hassan Raza ◽  
Muhammad Faisal Nadeem ◽  
Ali Ahmad ◽  
Muhammad Ahsan Asim ◽  
Muhammad Azeem
Keyword(s):  
Pure Sciences ◽  
Comparative Study ◽  
Clay Minerals ◽  
Chemical Compound ◽  
Topological Indices ◽  
Natural Phenomena ◽  
Chemical Graphs ◽  
Degree Of A Vertex ◽  
Long Time

: Intercapillary research in mathematics and other pure sciences areas has always helped humanity quantify natural phenomena. This article also contributes to which valency-based topological indices are implemented on tetrahedral sheets of clay minerals. These indices have been used for a long time and are considered the most powerful tools to quantify chemical graphs. The atoms in the chemical compound and the bonds between the atoms are depicted as the graph’s vertices and edges, respectively. The valency (or degree) of a vertex in a graph is the number of edges incident to that vertex. In this article, various degree-based indices and their modifications are determined to check each types’ significance.

scholarly journals Nano-scale texture and porosity of organic matter and clay minerals in organic-rich mudrocks

Fuel ◽  
2014 ◽  
Vol 135 ◽  
pp. 359-373 ◽  
Author(s):  
Utpalendu Kuila ◽  
Douglas K. McCarty ◽  
Arkadiusz Derkowski ◽  
Timothy B. Fischer ◽  
Tomasz Topór ◽  
...  
Keyword(s):  
Organic Matter ◽  
Clay Minerals ◽  
Nano Scale

scholarly journals The Occurrence of Authigenic Clay Minerals in Alkaline-Saline Lakes, Pantanal Wetland (Nhecolândia Region, Brazil)

Minerals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 718
Author(s):  
Isis Armstrong Dias ◽  
Leonardo Fadel Cury ◽  
Bruno Guimarães Titon ◽  
Gustavo Barbosa Athayde ◽  
Guilherme Fedalto ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Clay Minerals ◽  
Saline Lakes ◽  
Clay Fraction ◽  
Water Bodies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Fine Clay ◽  
Pantanal Wetland

Mg clay minerals are usually associated with carbonates in alkaline-saline environments, precipitated from solution and/or transformation from other minerals. The aim of this research is to identify the mineralogy and geochemistry of clay minerals in different alkaline lakes in the Nhecolândia region, the southernmost region of the Pantanal wetland (Brazil). Sediment samples were analyzed by X-ray diffraction, X-ray fluorescence, scanning electron microscopy and transmission electron microscopy. Water samples were analyzed, determining their main cations and anions, in order to understand their relationship with the clays. The analyses allowed classifying the water bodies as saline, oligosaline and freshwater lakes. The sediments are composed mainly of quartz and a fine-clay fraction, dominated by illite, kaolinite and smectite. The XRD results showed illite and smectite mixed-layered in the saline lakes at Barranco Alto farm, whereas at Nhumirim farm, trioctahedral smectite was only observed in one lake. The smectite minerals were normally identified coupled with calcite at the top of the sequences, associated with exopolymeric substances (EPS) in the lakes, suggesting that these minerals are precipitating due to the physical-chemical and biological conditions of the water bodies.

The Effects of Clay Minerals on Methylated Naphthalenes as Maturity Indicators of Sedimentary Organic Matter

2020 ◽  
Vol 49 (6) ◽  
pp. 728-731
Author(s):  
Kenta Asahina ◽  
Takeshi Nakajima ◽  
Kazuya Morimoto ◽  
Yasuaki Hanamura ◽  
Miyuki Kobayashi
Keyword(s):  
Organic Matter ◽  
Clay Minerals ◽  
Sedimentary Organic Matter
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