نتایج جستجو برای: petrogenesis
تعداد نتایج: 1010 فیلتر نتایج به سال:
Abstract Erebus volcano, Antarctica, is the southernmost active volcano on globe. Despite its remoteness and harsh conditions, provides an unprecedented unique opportunity to study petrogenesis evolution, as well passive explosive degassing, of alkaline magmatic system with a persistently open magma-filled conduit. In this chapter, we review nearly five decades scientific research related inclu...
The ophiolitic complex of Sahneh-Harsin is composed of rock units such as gabbro, basalt, diabasic dikes, diorite and plagiogranite. The geochemical studies show that primitive magma has been sub-alkaline tholeiitic Mg-rich and K-poor. These data show enrichment of light rare earth elements (LREE) and depletion of heavy rare earth (HREE). The ratio of NbTa in the basalts is between 16.19 and 18...
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