Litosferik Pleyt Tektonik Teorisi ve Porfirik Bakır Yatakları

Öz Exploration planning is taking into consideration, more and more, regional concepts of rock and ore genesis. High on the list of interesting regional targets remain volcanogenic belts of Post-Paleozoic ages. Of even broader scope are the rapidly evolving concepts relating to plate tectonics, Post-Eocene metallogenic type are located on or near present - day plate boundaries. Work is now in progress to relate older provinces and older, plate edges. This, it is to be hoped, will lead to usable concepts which provide new targets and new discorveries. In the Alpide zone, Turkey, Greece and Afghanistan seem to be likely areas for porphyry copper discovery. The new report, reviewing work, is still underway in northern Chile and Argentina. In this region mineralization is consistently related to volcanism and to granitic intrusive activity. A very extensive suite of age determinations of the rock has indicated a progressively younger age both volcanics and intrusively younger age both volcanics and intrusives inward from the coast. In other theories, porphyry copper deposits may originate with partial melting of oceanic crustal metarials as they thrust under a continental plate along a Benioff or «subducting» zone. Many of the World's large porphyry copper deposits are within zone or belts of calc-alkaline rocks that are intimately related to seismically active «Downgoing» crustal plates. Many of the recent discoveries of large copper deposits are closely linked to the «ring of fire» known Pacific belts and Alpide orogenic belt.