minerals in calcite vein

The origin of fluid in calcite veins and its implications for ...
2020年12月1日 1. Introduction. Calcite veins are commonly distributed in the carbonate rocks in the fault zone as the products of fault–fluid activities [1, 2].The geochronology
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Effect of calcite veins on the mechanical behavior and
2022年4月1日 Calcite is often found in sedimentary rocks as a vein mineral from hot springs, which can seal the natural fractures and provide space for mineral growth by
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Minerals Free Full-Text The Hydrothermal Fluid
2017年9月20日 Qsp-calcite veins crosscut the white and dark calcite veins and are themselves crosscut by vuggy calcite veins. In thin section and hand specimen the qsp
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Bedding-parallel calcite veins indicate
2021年11月1日 1. Introduction. Bedding-parallel calcite veins (BPCVs) are common and widespread in organic-rich shales in sedimentary basins. At least 110 of the 153
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Geochemistry of Calcite Veins: Records of Fluid Mixing and
2013年1月1日 The 1.85 Ga granitoid country rocks and the 0.9 Ga dolerite vein-related intrusions differ in chemical, geochemical, and stable isotope composition. The variation
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Mineralogical and geochemical study of clay and calcite
2011年6月1日 In this shear zone, centimetre-scale veins filled with clay minerals and calcite, occur which are called in this study “clay and calcite veins”. 2.2. Hydrogeology.
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Supercritical fluid in deep subduction zones as revealed by
2023年5月9日 These characteristics show that the vein minerals directly crystallized from the vein-forming fluid and were not removed from the host rock and transported as loose
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Geochemistry of Vein Calcites Hosted in the Troodos
2019年11月22日 The crosscutting and branching calcite vein networks analyzed in this study are ubiquitous structures and up to a few centimeters thick. Their proportion within
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The origin of fluid in calcite veins and its implications for ...
2020年12月1日 1. Introduction. Calcite veins are commonly distributed in the carbonate rocks in the fault zone as the products of fault–fluid activities [1, 2].The geochronology (Sm–Nd, U–Th, U–Pb) of structural calcite vein constrains the geological times of basin deformation, fault evolution, and fluid activities [[3], [4], [5], [6]].The calcite vein's
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Mineralogical and geochemical study of clay and calcite
2011年6月1日 In this shear zone, centimetre-scale veins filled with clay minerals and calcite, occur which are called in this study “clay and calcite veins”. 2.2. Hydrogeology. The sulphur spring is located on the Devesa River drainage basin oriented along one of the most important structural directions (NNW–SSE).
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Supercritical fluid in deep subduction zones as revealed by
2023年5月9日 These characteristics show that the vein minerals directly crystallized from the vein-forming fluid and were not removed from the host rock and transported as loose crystals in the fluid (SI Appendix, Fig. S1). Omphacite and rutile are mainly distributed along the vein wall in the form of large euhedral grains (1 to 3 cm) .
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Fluid overpressure estimates from the aspect ratios of
2012年12月18日 A calcite vein described by Lee and Wiltschko (2000) consists of more than 200 increments, each of thickness 300 to 1000 μm. All these mechanisms indicate that individual mineral veins are commonly the result of many fluid injections adding both length and thickness increments.
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Restricted internal oxygen isotope exchange in calcite
2021年3月15日 1. Introduction. The stable (δ 18 O and δ 13 C) and clumped (Δ 47 and Δ 48) isotopic compositions of carbonate minerals are widely used to study the composition, origin and temperature of paleofluids.Knowledge of the isotopic composition of paleofluids and crystallization temperature of minerals is of interest to researchers in a wide variety
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Formation of bedding-parallel, fibrous calcite veins in
2018年12月1日 In contrast to the antitaxial calcite veins with well-developed fibres described by Bons and Montenari (2005) ... After subsequent sealing of fractures by vein mineral precipitation, the wall-rock fragments are retained as inclusion bands or trails (Ramsay, 1980; Machel, 1985). Thus, presence of the inclusion bands (parallel to the
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Mineral chemistry and formation conditions of calc-silicate
2019年10月27日 Opaque minerals are mainly magnetite along with some sulfide (i.e., pyrite) minerals. Some late quartz and calcite vein–veinlets cut these rocks. Also, calcite is present between the garnet crystals (Fig. 4b). The garnet–pyroxene skarn sub-zone is located near the contact of intrusion. It contains clinopyroxene, garnet, actinolite, calcite ...
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Timing and ore genesis of the Ciweigou low-sulfidation
2022年10月1日 Similarly, in the vein system, calcite veins are earlier than quartz-sulfide veins and adularia veins. Metal sulfides and gold-bearing bands are present in the quartz-calcite veins of the Ciweigou Au-Ag deposit. In contrast, gold-bearing bands are absent in the calcite veins of the Waihi Au-Ag deposit (Robert et al., 2002).
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Microtextures and fluid inclusions from vein minerals
2018年6月6日 Oscillatory growth zoning of late-stage calcite in cavities of incompletely sealed syntaxial veins points to a change into pervasive porous flow or even diffusion through host rock and vein minerals. A pure diffusive regime is proposed for antitaxial fibrous calcite veins (Means and Li, 2001; Bons et al., 2012). The fine nature of zonation in ...
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Geochemical and microtextural properties of veins in a
2022年1月1日 The vein-filling minerals are calcite, barite-celestine, anhydrite, and quartz (Fig. 4). The internal structure of these veins can be divided into three parts in which different mineral phases can be observed (Fig. 6, Fig. 7 A).
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The origin of fluid in calcite veins and its implications for ...
2020年12月1日 1. Introduction. Calcite veins are commonly distributed in the carbonate rocks in the fault zone as the products of fault–fluid activities [1, 2].The geochronology (Sm–Nd, U–Th, U–Pb) of structural calcite vein constrains the geological times of basin deformation, fault evolution, and fluid activities [[3], [4], [5], [6]].The calcite vein's
Charlar en Línea
Mineralogical and geochemical study of clay and calcite
2011年6月1日 In this shear zone, centimetre-scale veins filled with clay minerals and calcite, occur which are called in this study “clay and calcite veins”. 2.2. Hydrogeology. The sulphur spring is located on the Devesa River drainage basin oriented along one of the most important structural directions (NNW–SSE).
Charlar en Línea
Supercritical fluid in deep subduction zones as revealed by
2023年5月9日 These characteristics show that the vein minerals directly crystallized from the vein-forming fluid and were not removed from the host rock and transported as loose crystals in the fluid (SI Appendix, Fig. S1). Omphacite and rutile are mainly distributed along the vein wall in the form of large euhedral grains (1 to 3 cm) .
Charlar en Línea
Fluid overpressure estimates from the aspect ratios of
2012年12月18日 A calcite vein described by Lee and Wiltschko (2000) consists of more than 200 increments, each of thickness 300 to 1000 μm. All these mechanisms indicate that individual mineral veins are commonly the result of many fluid injections adding both length and thickness increments.
Charlar en Línea
Restricted internal oxygen isotope exchange in calcite
2021年3月15日 1. Introduction. The stable (δ 18 O and δ 13 C) and clumped (Δ 47 and Δ 48) isotopic compositions of carbonate minerals are widely used to study the composition, origin and temperature of paleofluids.Knowledge of the isotopic composition of paleofluids and crystallization temperature of minerals is of interest to researchers in a wide variety
Charlar en Línea
Mineral chemistry and formation conditions of calc-silicate
2019年10月27日 Opaque minerals are mainly magnetite along with some sulfide (i.e., pyrite) minerals. Some late quartz and calcite vein–veinlets cut these rocks. Also, calcite is present between the garnet crystals (Fig. 4b). The garnet–pyroxene skarn sub-zone is located near the contact of intrusion. It contains clinopyroxene, garnet, actinolite, calcite ...
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Paragenesis and geochemistry of ore minerals in the
2013年12月13日 The Py 3 is disseminated in host rocks or is paragenetically associated with Apy 3 and stibnite in quartz ± calcite veins in fracture zones, which indicates a brittle deformation regime during the late ore stage (Figs. 4 and 7 and Table 1). The Py 3 –Apy 3 –stibnite–quartz ± calcite veins cut the earlier formed Py 2 –Apy 2 –quartz ...
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Microtextures and fluid inclusions from vein minerals
2018年6月6日 Oscillatory growth zoning of late-stage calcite in cavities of incompletely sealed syntaxial veins points to a change into pervasive porous flow or even diffusion through host rock and vein minerals. A pure diffusive regime is proposed for antitaxial fibrous calcite veins (Means and Li, 2001; Bons et al., 2012). The fine nature of zonation in ...
Charlar en Línea
Timing and ore genesis of the Ciweigou low-sulfidation
2022年10月1日 Similarly, in the vein system, calcite veins are earlier than quartz-sulfide veins and adularia veins. Metal sulfides and gold-bearing bands are present in the quartz-calcite veins of the Ciweigou Au-Ag deposit. In contrast, gold-bearing bands are absent in the calcite veins of the Waihi Au-Ag deposit (Robert et al., 2002).
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Geochemical and microtextural properties of veins in a
2022年1月1日 The vein-filling minerals are calcite, barite-celestine, anhydrite, and quartz (Fig. 4). The internal structure of these veins can be divided into three parts in which different mineral phases can be observed (Fig. 6, Fig. 7 A).
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