Formula for dating age gap

30-Jan-2017 09:45

After strong differentiation it formed tungsten-bearing granitoids characterized by enrichment of high alkali, silicon and volatile components.In the Yangchuling mine area the small monzogranitic porphyry stock has stronger fractionation, volatile content and ore-forming components than the older granodiorite, resulting in the development of the porphyry W–Mo ore system.

Geochemical data show that both granodiorite and monzogranitic porphyry are characterized by enrichment of large ion lithophile elements (LILE) relative to high field strength elements (HFSE), indicating a peraluminous nature (A/CNK = 1.01–1.08).

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The differences between a couple are likely to become intensified as they grow older.

For example, the difference between 25 and 40 seems less than the difference between 65 and 80 — and unfortunately, nowadays, when changes are occurring with increasing momentum, even small age gaps can feel larger than once they did.

Two granitoids are characterized by a negative slope with significant light REE/heavy REE fractionation [(La/Yb)) of ~ 1.2–1.3 Ga are consistent, indicating that Neoproterozoic crustal rocks of the Shuangqiaoshan Group could have contributed to form the Yangchuling magmas.