GEO 3167 Lecture 1: Lecture1
25 Apr 2016
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Name the major elements in the three different layers of the earth (core, mantle, crust). Core: fe-ni-s traces:au, te, pt, pd, rh, os, ir (pge) Mantle: si, mg, fe, cr, al minor: ca, na, ti (traces ni, co. Crust: si, al, fe, ca, na, k, p, c traces: li, be, b, rb, sr, zr, nb, ta, sn, w, u. A) siderophile: native elements and alloys (au, pt) B) chalcophile: form sulphides, arsenides, tellurides (fe, ni, co, cu, zn, cd, C) lithophile: form oxides, carbonates, silicates and sulphates (si, al, fe, mn, D) atmophile elements: form gasses (h, o, f, br, ne, he,) Which elements are naturally enriched in which igneous rock types (magmatic inheritance) ? (minerals are magmatically inherited, eg ultramafic rocks are naturally enriched in ni, pge) Ultramafic rocks: cr, pge, fe, ni, co (cu, au) Intermediate: cu, au, ag, pb, zn, mo. Alkaline rocks and pegmatites: nb, ta, ree, u.
