authigenic mineral

[¦ȯ·thə¦jen·ik ′min·rəl]

(mineralogy)

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During authigenic mineral formation, ash assimilated some elements from the surrounding environment, whereas the set of assimilated elements has been considerably different in the Kinnekulle and BII bentonites.

Internal stratification of two thick ordovician bentonites of estonia: deciphering primary magmatic, sedimentary, environmental and diagenetic signatures/Kahe paksu Ordoviitsiumi bentoniidi sisemine stratifikatsioon: magmaliste, setteliste, keskkonna ja diageneetiliste tunnuste desifreerimine

In such contexts, glauconite is an authigenic mineral developed as pelletal facies (mud coprolites, foraminiferal tests and mineral debris), and less frequently as films growing in holes, cracks and borings on hardgrounds and omission surfaces that may be associated with phosphates (e.g., Odin and Letolle, 1981; Odin and Matter, 1981; Fischer, 1990; Jimenez-Millan et al., 1998; Wigley and Compton, 2007).

Glauconitic laminated crusts from hydrothermal alteration of Jurassic pillow-lavas (Betic Cordillera, S Spain): a microbial influence case

3e), although truncation and mechanical reworking can also separate stages of authigenic mineral formation.

Micromorphology of sepiolite occurrences in recent lacustrine deposits affected by soil development

The clastic matrix is composed mainly of silt-size quartz and illite, the minor clastic minerals are feldspars and chlorite, pyrite is a rather common authigenic mineral. The organic matter represents a mixture of high-molecular polyfunctional organic compounds, the real structure of which is yet a subject of studies.

Lechatelierite-bearing microspherules from semicoke hill (Kivioli, Estonia): contribution to the contamination problem of natural microtektites

However, the complicated geological conditions and resultant authigenic mineral structures described in these publications resemble, but do not equal those determined and described in the present study.

Unusual features of the middle Devonian Narva formation covering the oil shale bearing rocks in Estonia

However, there is uncertainty regarding a) whether the geochemical system is open or closed during diagenesis in sedimentary basins (Bjorkum & Gjelsvik, 1988; Bjorlykke & Jahren, 2010; Gluyas&Coleman, 1992; Sullivan et al., 1990; Worden & Barclay, 2000; Usman et al., 2018), and b) the origin and formation process of authigenic minerals, including clay minerals, and carbonate and quartz cements in sandstone (Barclay & Worden, 2000; Dowey, 2012;Worden & Morad, 2000).

Diagenetic controls on reservoir quality of tight sandstone: A case study of the Upper Triassic Yanchang formation Chang 7 sandstones, Ordos Basin, China/Controles diageneticos en yacimientos de arenisca compacta: estudio de caso de las areniscas Chang 7, en la Formacion Yanchang, Triasico Superior, cuenca de Ordos, China

Wang, "Climatic implication of authigenic minerals formed during pedogenic weathering processes," Earth Science, vol.

Visible and Near-Infrared Reflectance Spectroscopy for Investigating Soil Mineralogy: A Review

Precipitation occurs when the pore water reaches saturation and forms authigenic minerals, such as kaolinite, chlorite, illite, and authigenic quartz, which can occupy pore space, block throats, and thus reduce the quality of the reservoir properties.

Feldspar Dissolution and Its Influence on Reservoirs: A Case Study of the Lower Triassic Baikouquan Formation in the Northwest Margin of the Junggar Basin, China

The ash particles are covered by secondary precipitates, and bonds between the particles are generated by interlocking needle- and lath-shape authigenic minerals that can be identified by crystallite morphology and chemical composition as hydrocalumite and ettringite.

Geopolymeric potential of the Estonian oil shale solid residues: petroter solid heat carrier retorting ash

The presence of authigenic minerals like kaolinite, gibbsite, boehmite and dickite may owe to the decomposition and prolonged moderate to intense insitu leaching of alumino-silicates present in Mesozoic rocks andpart of Permian rocks.

THE MINERALOGICAL AND PETROGRAPHICAL STUDIES OF THE LITHOFACIES OF THE HANGU FORMATION IN THE SALT RANGE, PUNJAB

Phyllosilicates and [Fe.sup.3+]-oxyhydroxides dominate among the authigenic minerals. The resulting structure and chemical composition of the newly formed crystalline and amorphous minerals is controlled by the chemistry of the parent rock and its constituents (Fig.

Phyllosilicates in the sediment-forming processes: weathering, erosion, transportation, and deposition

In Authigenic Minerals of Baltic Terrigenous Sediments (Pirrus, E., ed.), pp.

Diagenetic influences on iron-bearing minerals in Devonian carbonate and siliciclastic rocks of Estonia / Diageneetiliste muutuste moju rauamineraalidele Eesti Devoni karbonaatsetes ja terrigeensetes kivimites