Dunia ke saare volcanoes mein ek jaise minerals ya elements
Dunia ke saare volcanoes mein ek jaise minerals ya elements nahi milte! Har volcano ka magma (pighli chattan) alag-alag composition ka hota hai, isliye minerals aur elements ki quantity mein bohot farak padta hai.
Common elements (jo almost sab mein hote hain)
Sab volcanoes ke magma mein yeh basic elements zaroor milte hain (Earth ke mantle aur crust se aate hain):
• Oxygen (O) – sabse zyada (~45-50percent)
• Silicon (Si) – doosra sabse common
• Aluminum (Al), Iron (Fe), Magnesium (Mg), Calcium (Ca), Sodium (Na), Potassium (K)
Yeh 8 elements milke 98-99 percent magma banate hain. Gases bhi common hote hain jaise H₂O (pani ki bhap), CO₂, SO₂.
Lekin kitna zyada ya kam – yeh alag-alag hota hai! Isse volcano ka type aur eruption style bhi change ho jata hai.
Volcano types ke hisab se differences (silica content se decide hota hai)
1 Basaltic (Mafic) volcanoes (jaise Hawaii ke Kilauea, Mauna Loa – silica kam: 45-52percent)
◦ Iron (Fe) aur Magnesium (Mg) bohot zyada → dark color lava
◦ Common minerals: Olivine, Pyroxene, Plagioclase feldspar
◦ Quartz bahut kam ya nahi hota
◦ Lava runny hoti hai, shield volcanoes bante hain, kam explosive
Yeh dekho basaltic lava flow ke examples (Hawaii style, dark aur smooth/pahoehoe): 6 “LARGE” 7 “LARGE”
2 Andesitic/Intermediate (subduction zones jaise Andes, Japan, Mt. St. Helens – silica medium: 52-63percent)
◦ Balanced minerals: Plagioclase, Hornblende, Pyroxene
◦ Zyada explosive eruptions
Andesitic stratovolcano eruption look like this (ash cloud wala dramatic): 0 “LARGE”
3 Rhyolitic/Felsic (jaise Yellowstone – silica bohot zyada: >63-75percent)
◦ Potassium (K) aur Sodium (Na) zyada
◦ Common minerals: Quartz, Feldspar, Biotite
◦ Quartz bohot common (basaltic mein rare)
◦ Lava thick aur sticky → super explosive
Rhyolitic rocks jaise obsidian (black glassy) examples: 3 “LARGE” 4 “LARGE”
Extra special cases
Kuch volcanoes mein bilkul unique cheezein hoti hain jaise carbonatite (Tanzania ka Ol Doinyo Lengai) – carbonate minerals, gold/copper deposits hydrothermal se, ya diamonds kimberlite pipes se (rare volcanic type).
Short mein samjho
• Basic common elements → Haan, sab mein hote hain (Si, O, Al, Fe, Mg etc.)
• Minerals, proportions, aur rare elements → Nahi bhai, ek jaise nahi! Basaltic mein dark heavy minerals zyada, rhyolitic mein light silica-rich zyada, aur kuch mein alag-alag special.
Yeh sab tectonic plates (divergent ya convergent), magma source aur evolution se depend karta hai. Isliye har volcano unique hota hai.
Comments
Interesting!