Divergent plate boundaries

Divergent plate boundary Areas where adjacent tectonic plates are separating. A spreading zone. Dolomite A calcium-magnesium carbonate mineral, CaMg(C03)2-Dolostone A sedimentary carbonate rock primarily consisting of dolomite. 

Marchig V. and Gundlach H. (1982) Iron-rich metalliferous sediments on the East Pacific Rise prototype of undifferentiated metalliferous sediments on divergent plate boundaries. Earth Planet. Sci. Lett. 58, 361-382. 

Figure 2 A section across the East Pacific Rise in the South Pacific showing He in excess over that expected from the atmospheric He dissoived in sea water when scaied to the more common He. The difference between the dissolved isotopic ratio and atmospheric ratio is represented by <5 He in percentage difference. He is assumed to be primordial and indicates degassing of the mantle at the divergent plate boundaries featured as oceanic ridge systems. STNstation number of the sampling. (Reprinted with permission from Lupton and Craig 1981, copyright American Association for the Advancement of Science.)...

Bookshelf faulting Divergent plate boundaries Hreppar microplate Seismicity of Iceland South Iceland Seismic Zone Tjomes fracture zone Transform zones Volcanic earthquakes... 

Clifton A, Kattenhom S (2006) Stmctural architecture of a highly oblique divergent plate boundary segment. Tectraiophysics 419 27—40... 

Hjartardottir AR, Einarsson P, Brandsddttir B (2010) The Kerlingar fault, northeast Iceland a Holocene normal fault east of the divergent plate boundary. Jokull 60 103-116... 

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