Fluid–rock reactions in the 1.3 Ga siderite carbonatite of the Grønnedal–Íka alkaline complex, Southwest Greenland
Sign Up to like & getrecommendations! Published in 2018 at "Contributions to Mineralogy and Petrology"
DOI: 10.1007/s00410-018-1505-y
Abstract: Petrogenetic studies of carbonatites are challenging, because carbonatite mineral assemblages and mineral chemistry typically reflect both variable pressure–temperature conditions during crystallization and fluid–rock interaction caused by magmatic–hydrothermal fluids. However, this complexity results in recognizable alteration… read more here.
Keywords: fluid; fluid rock; nnedal alkaline; complex southwest ... See more keywords
Generation of a potassic to ultrapotassic alkaline complex in a syn-collisional setting through flat subduction: Constraints on magma sources and processes (Otjimbingwe alkaline complex, Damara orogen, Namibia)
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DOI: 10.1016/j.gr.2020.01.004
Abstract: Abstract The ~545 Ma-old syn-collisional Otjimbingwe alkaline complex is composed of pyroxene-amphibole-biotite-bearing, mildly nepheline-normative to quartz-normative rocks ranging in composition from monzogabbro to monzonite, syenite and granite. The alkaline rocks have moderate to high SiO2 (50.5–73.0 wt%)… read more here.
Keywords: otjimbingwe alkaline; subduction; alkaline; syn collisional ... See more keywords