From the perspective of the structural alteration of micaceous minerals, regardless of the sequence of Cs + adsorption and weathering, the adsorption of Cs + can stabilize micaceous mineral structures by collapsing expanded interlayers (Fig. 2) or impeding the structural destruction of biotite and phlogopite during weathering (Figs. 4 and 5).

Phlogopite: Chlorite-Mg: ParagoniticIllite: Vermiculite: Mg-illite: Chlorite: SBD284-17.5: 484911: 9008549: 1161: Volcanic lithic breccia: Epidote: NULL: Phlogopite: Epidote: Epidote: ... deposits is still unclear. Furthermore, there is limited information at present to suggest that the variations in alteration mineral geochemistry are specific ...

Phlogopite is widely accepted as a major mineral indicator of the modal metasomatism in the upper mantle within a very wide P–T range. The paper reviews data on various phlogopite-forming reactions in upper-mantle …

Petrographic and mineralogie studies show that the primary mineral phases in the host rock are diopside, tschermakitic hornblende, Fe-rich phlogopite, and plagioclase. ... acidic weathering and alkaline metasomatism is suggested for the dioctahedral vermiculite and secondary Fe-rich phlogopite, respectively. The alteration of phlogopite to ...

Phlogopite is heat resistant, does not transmit electricity, and is a poor conductor of heat. Uses of Phlogopite. Phlogopite and muscovite are the only two mica minerals that are used commercially. Phlogopite is used less often than …

Paragenetic sequence of mineralization and alteration minerals for the Xiadian gold deposit, with the width of bars representing the mineral abundance estimated on a petrographic basis. ... The primary phlogopite underwent alteration, giving way to the formation of chlorite and acicular rutile. Similarly, the igneous magnetite was replaced by ...

Infrared spectral analysis shows that the skarns mainly reflect retrograde mineral assemblages, formed in three different hydrothermal alteration stages with over. Mineral phases spectrally detected include (1) vesuvianite, actinolite, and phlogopite (alteration stage 1), (2) epidote, prehnite, and illite (alteration stage 2), and (3 ...

Mg-rich silicates in the deposit can be separated into Mg-rich skarn minerals (such as forsterite, diopside and chondrodite) and Mg-rich retrograde skarn minerals (such as phlogopite, tremolite, serpentine, clinochlore and chamosite). Relicts of calcite and/or dolomite are present in all alteration mineral assemblages.

The characteristic mineral of potassic alteration is phlogopite. The contents of F and Cl reflect the fugacities of HF and HCl during the formation of potassic alteration (Munoz, 1984;

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A correlation between adsorption behavior of Th(IV) and structural alteration of phlogopite is estimated. • A mixed-layer structure formed from phlogopite to vermiculite- or montmorillonite-like mineral. • A direct relationship between Th(IV) adsorption capacity and phlogopite weathering was observed.

The spectral technologies, such as reflectance and imaging spectroscopy, appear as advanced remote sensing data for detailed and rapid analysis of alteration minerals, including their distribution ...

However, this is actually a rather unspecific umbrella term for three different secondary mineral assemblages: (1) biotite-magnetite, (2) phlogopite-magnetite, and (3) orthoclase alteration ...

The alteration at Korpela is classified according to mineral assemblages and chemical alteration types based on observations of key mineral abundance, textures and chemical whole-rock assay data. A total of six chemical alteration types can be defined: Mg-Fe-S, K-Al-Fe-(± S), K-Al-Mg-Fe-S, K, Si-K-Ca-(± S) and Ca-(± Na) (Fig. 5a–f ), as ...

The formation sites of alteration products are controlled by phase transformation mechanisms; as alteration progresses, the structural similarity between products and the parent mineral biotite ...

5.4.3. Alteration of muscovite and phlogopite During runs with muscovite at pH 2 and 3, interlayer K+ was preferentially released compared to other elements, which is reflected in the nonstoichiometric release ratios in Table 4. ... Newman A. C. D. (1967) Changes in phlogopite during their artifi- cial alteration. Clays Clay Minerals 7, 215-226 ...

of late-stage alteration. Introduction Serpentine minerals are prominent in many kimberlites, but little is known about the details of their formation. ... and opaque minerals. Phlogopite phe- nocrysts and olivine macrocrysts are rounded, suggesting resorp- tion. Serpentine pseudomorphs after olivine phenocrysts range from 0.1 to 0.4 mm in ...

The formation of volatile-rich phases in magmatic sulfide systems has been interpreted at least in six different ways. The most popular model attributes their origin to secondary processes, mostly due to the presence of serpentine, chlorite, phlogopite, amphibole, and calcite. While chlorite and serpentine are likely to form as alteration products, the other …

When phlogopites containing only a little iron are artificially altered with sodium tetraphenylboron solutions, the vermiculite-like products contain fewer interlayer cations than the original micas.

Abstract When phlogopites containing only a little iron are artificially altered with sodium tetraphenylboron solutions, the vermiculite-like products contain fewer interlayer cations than the original micas. Structural formulae of the products are calculated from the chemical analyses, together with infrared examination of the angular vibration band of water at 1650 cm−1 to …

Phlogopite-biotite is a ubiquitous mineral of the metasomatized rocks and those derived from melting of the ... As an ordinary alteration mineral in the process of fluid–rock interaction ...

Phlogopite [KMg 3 AlSi 3 O 10 (OH) 2] is a common hydrous mineral that occurs in ultramafic-alkaline igneous rocks, including kimberlites, aillikites, orangeites, and carbonatites 1,2,3,4.This ...

Phlogopite belongs to the mica family of phyllosilicates with a chemical formula of KMg 3 [Si 3 AlO 10](OH, F) 2 which is known as magnesium mica. Magnesium can be substituted by iron in variable amounts forming the more common biotite (Kalinowski and Schweda 1996; Luo et al. 2015).It can be widely found all over the world as an important industrial silicate mineral.

The driving force behind alteration of phlogopite is the removal of K from interlayer regions of the mineral. In order for K to migrate rapidly, a suitable sink must exist. In this case, the precipitation of jarosite [KFe 3 (SO 4 ) 2 (OH) 6 ] provided the necessary sink.

Abstract The altered ultramafic rocks from Higher Himalayan Crystalline (HHC) are characterised by the mineral assemblage of olivine, pyroxene, phlogopite, chromite, and opaques. Olivine and pyroxenes show alteration to serpentine, talc, anthophyllite, and tremolite. In the present research work, the petrogenesis and paleo-tectonic setting of the ultramafic rocks from …

The minerals developed between these olivine and orthopyroxene crystals are plagioclase, augite, phlogopite and sulfide. The phlogopite commonly contains small elongate needles of apatite. …

The alteration experiments of phlogopite with 0.01 N HCl solution containing 0.1 M NaCl at 50 degrees, 80 degrees and 120 degrees C have been carried out to aid in the understanding of the ...

It exists in all degrees of alteration; the end-product shows relict mica cleavages, has a pearly to satiny luster, and varies from brown to light brown to colorless and all intermediate hues. ... The Check List of Franklin-Sterling Hill Fluorescent Minerals - Phlogopite (Fluorescent Info) View Issue: V. 27 No. 2 - Fall 1986, pg. 7: Minerals of ...

Considering the phlogopite phenocrysts in lamprophyre have high Mg/Fe (reach to 1.67–4.47; our unpublished data), more Mg could be released out of the phlogopite into fluid …

This result further demonstrates that K + in the solution is beneficial to the formation of phlogopite–vermiculite mixed-layer minerals. In addition, the phlogopite-vermiculite mixed layer mineral peak at d 002 – 2 = 12.125 Å in sample Y 2D is lower than the diffraction peak of phlogopite (1:1 regular interlayer mineral) by 12.5 Å, and ...