The Geology and Metallogeny of Oceanic Ridges
Received date: 1990-04-30
Revised date: 1990-10-03
Online published: 1991-01-01
潘传楚 . 洋脊地质学与成矿学[J]. 地球科学进展, 1991 , 6(1) : 32 -39 . DOI: 10.11867/j.issn.1001-8166.1991.01.0032
Oceanic ridges are subdivided into active type and stable (aseismic) type. The vertical sequence of rock units of oceanic ridges consists of unconsolideted oceanic floor sediments,upper oceanic crustal layer and lower oceanic crustal layer. On oceanic ridges transverse fracture zones are general, metamorphism and alteration are common just like those of the continental tholeiite, and there are two metallogenetic processes in which mineral deposits are being formed. The ore deposits (mineralization) discovered on oceanic ridges in recent 20 years are subdivided into 11 patterns,some of them have the value of commodity. The study of oceanic ridges-will reveal the secrets of the oceanic crust, and help to recognize the evolution of the continental crust and the earth, especially, sedimentation, magmatism, metamorphism, diagenesis, metallogenation and tectonics, as well as the relationship of them.
Key words： oceanic ridge; rift valley; metallogeny
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