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Ankerite
About: Ankerite is a research topic. Over the lifetime, 859 publications have been published within this topic receiving 23960 citations.
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TL;DR: In this article, in situ C-O isotope analyses were conducted for zoned dolomite-ankerite/calcite cements from the Permian Lucaogou Formation in the Junggar Basin, China, using secondary ion mass spectrometry (SIMS) combined with mineralogical and elemental analyses.
2 citations
Journal Article•
TL;DR: In this article, the authors analyzed the relationship between the phenomena of digeneisis and mineralization in different strata in the basin and established the sequences of diagenesis and mineralisation.
Abstract: Following the process of tectonic and sedimentary evolution fo South Qniling basin,by analyzing the relationship between the phenomena of digeneisis and mineralization in different strata in the basin and the development and evolution,this paper discusses the episodic-fluid process and the diagenesis and mineralization from the early Paleozoic to Devonian,and establishes the sequences of diagenesis and mineralization.The earliest episodic-fluid activity in Paleozoic basin of South Qinling happened in early Cambrian when the barite/witherite deposits and mineralization of Au-PGE with carbonaceous-siliceous rock were formed from the east to the west.During ealy-middle Silurian,episodic-fluid activity produced albite rock,barite rock,ferruginous carbonate rock,siliceous rock and ore deposits of Pb-Zn and mineralization of Au.During the Devonian,the strongest hydrothermal sedimentatione took place in siliceous rock,and albite rock,barite rock,ankerite slate and Pb-Zn(Cu)ore deposits,ankerite siliceous rock type Pb-Zn(Cu)ore deposits,and Au,Cu deposits in albite rock/ankerite slate were formed.
2 citations
TL;DR: In this article , the authors demonstrate the great value of iron oxide chemistry in low-temperature systems and demonstrate that in-situ IR chemistry support post-metamorphic, structurally controlled, hydrothermal hematite ore formation via multiple stages of hydrothermally altered BIF.
2 citations
TL;DR: In this paper , the biaxial plot of the peak frequencies of the lattice modes linearly moves upon partial substitution of the cations, and the slopes of the movement were different for different cation substitution.
Abstract: Abstract Carbonates are ubiquitous minerals carrying important information on aqueous environments where they precipitated on the Earth and space. While their ideal chemical formulae are denoted as simple as MCO 3 or M 1 M 2 (CO 3 ) 2 (M: metal cations), natural carbonates generally form solid-solution series and their compositions deviate from the ideal formulae. Since their cation composition due to the substitution provides a sensitive indicator for chemical and thermodynamic environments of aqueous solutions where they precipitated, their composition analysis has been widely carried out from the environmental/geochemical/astrochemical aspects. However, in widely used back-scattered electron and energy dispersion X-Ray analyses, samples should be generally sliced and/or their surface be polished prior to the measurements. For analyzing rare samples with small sizes, such as ones sampled from deep-sea and/or meteorites and asteroids, a non-destructive method without any pretreatments has been strongly desired. Here, a novel analytical method for discriminating various carbonates with Raman micro-spectroscopy is demonstrated, showing that the biaxial plot of the peak frequencies of their lattice modes linearly moves upon partial substitution of the cations. The cation substitution leads to linear movement in the biaxial map, and the slopes of the movement were different for Mg 2+ -Fe 2+ and Mn 2+ -Fe 2+ substitutions. This finding suggests that the micro-Raman analysis would be a non-destructive analytical method for evaluating the relative amount of Mg 2+ , Fe 2+ , and Mn 2+ in dolomite-ankerite-kutnohorite solid-solution series, as well as Mg 2+ /Fe 2+ ratio for magnesite-breunnerite-siderite. It would be helpful for analyzing the present and past terrestrial and cosmochemical environments. Graphical abstract
2 citations