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Orogenic gold deposits were only formed in certain time slices of the Earth's history. [ 7 ] [ 8 ] Orogenic gold deposits are mainly concentrated in three epochs of Earth history: (1) Neoarchean 2.8–2.5 Ga, (2) Paleoproterozoic 2.1–1.8 Ga and, (3) Phanerozoic 0.500–0.05 Ga.
Epithermal — mineral ore deposits formed at low temperatures (50–200 °C) near the Earth's surface (<1500 m), that fill veins, breccias, and stockworks. [ 2 ] Telethermal — mineral ore deposits formed at shallow depth and relatively low temperatures, with little or no wall-rock alteration, presumably far from the source of hydrothermal ...
The ocean reservoir contains an estimated 5.6x10 9 Mg of gold and oceanic gold concentration is about 4 ng Au/L with higher values in some coastal waters. [1] Au(I/III)-ions and Au(0)-colloids are unstable under surface conditions in aqueous solutions and commonly form ligand complexes with substances excreted by microorganisms. [3]
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Earthquake hazard zones of Pakistan. Pakistan geologically overlaps both with the Indian and the Eurasian tectonic plates where its Sindh and Punjab provinces lie on the Indian plate while western parts of Balochistan and parts of Khyber-Pakhtunkhwa lie on the Eurasian plate which mainly comprises the Iranian plateau although reaching on the Indian plate, albeit bordering the Arabian plate on ...
Looking at 24-hour daily highs, all 10 of the hottest locations were found in India and Pakistan, and the highest temperature recorded on Earth at official weather stations Thursday was a toasty ...
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In Punjab, deposits are found in the cracks of limestone in the form of veins. It is found in Attock, Rawalpindi, Chakwal, Jhelum, and D.G. Khan Districts. In Kala Chitta Range in Attock District, calcite is found in abundance in pure form. [3] Daud Khel: Celestine (celestite)