the earth's crust and useful minerals

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powerpoint presentation the earth's crust and useful minerals xidirova obida 1. earth's crust: structure and composition 2. extraction, uses, and environmental impact 3. major useful minerals and their properties plan: introduction to the earth's crust the earth's crust, averaging only 30-50 kilometers thick, is a remarkably thin outermost layer compared to the significantly larger mantle and core, representing less than 1% of earth's total volume. plate tectonics, driven by mantle convection, continuously reshapes the earth's crust through processes like subduction, where denser oceanic plates sink beneath continental plates, leading to volcanic activity and mountain building. formation of minerals sedimentary processes concentrate minerals like halite (rock salt) through evaporation of saline water bodies; this process leads to the formation of evaporite deposits with concentrations surpassing 98% purity in certain areas. mineral formation often occurs through crystallization from magma or lava, with slower cooling leading to larger crystals like those found in …
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rising 17 elements crucial for electronics and green technologies, are geographically concentrated, leading to geopolitical complexities and price volatility exceeding 10% annually in recent years. composition of the earth's crust while oxygen dominates by weight, silicon is crucial in the tetrahedral structure of silicate minerals that form the backbone of most crustal rocks; nearly 75% of the crust's mass is composed of silicate minerals. the earth's crust is predominantly composed of oxygen (approximately 46.6%), silicon (27.7%), and aluminum (8.1%), forming silicate minerals like feldspars and quartz that constitute a significant portion of its volume. environmental impacts of mining mining activities contribute significantly to greenhouse gas emissions, with an estimated 5% of global co2 emissions linked to metal ore extraction and processing, impacting climate change. acid mine drainage, a consequence of sulfide mineral oxidation, generates highly acidic wastewater with ph levels as low as 2.5, contaminating water sources and harming aquatic …
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powerpoint presentation the earth's crust and useful minerals xidirova obida 1. earth's crust: structure and composition 2. extraction, uses, and environmental impact 3. major useful minerals and their properties plan: introduction to the earth's crust the earth's crust, averaging only 30-50 kilometers thick, is a remarkably thin outermost layer compared to the significantly larger mantle and core, representing less than 1% of earth's total volume. plate tectonics, driven by mantle convection, continuously reshapes the earth's crust through processes like subduction, where denser oceanic plates sink beneath continental plates, leading to volcanic activity and mountain building. formation of minerals sedimentary processes concentrate minerals like halite (rock salt) through evaporation of s...

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