Quartz breccia is a rock made up of angular fragments of quartz that have been broken and re-cemented, usually by silica (and sometimes sulphides, iron oxides, or carbonate). What it means geologically A. Brecciation = brittle fracturing due to tectonic stress, faulting, shearing, or hydrothermal fluid pressure. B. The broken quartz fragments (clasts) are later cemented by quartz or mineral-rich fluids. C. Common in fault zones, shear zones, and vein systems. Why it matters in mineral exploratio
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What minerals is breccia made of? - TimesMojo
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When a volcano erupts, pyroclastic flows are often the biggest danger to anyone nearby. These fast-flowing currents of rock, ash and hot gas are extremely difficult to study, so researchers created their own. Read the related Nature Geoscience paper here: https://go.nature.com/2Im1bYs | Nature Portfolio
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