Dyke

Rock type: 
Age: 
4 millions years

Basalt dyke in  basaltic interchange lavas and pyroclastic material. Intermediate volcanic complex. Cenozoic. Neogene. Pliocene.

Rock type: 
Age: 
4 millions years

Basalt dyke in  basaltic interchange lavas and pyroclastic material. Intermediate volcanic complex. Cenozoic. Neogene. Pliocene.

Rock type: 
Age: 
4 millions years

Madeira, Sao Lourenco. Basalt dyke in  basaltic interchange lavas and pyroclastic material. Intermediate volcanic complex. Cenozoic. Neogene. Pliocene.

Rock type: 
Age: 
50 millions years

Andesite dyke. Sikhote-Alin series of Eocene subintrusions. Eocene. Porphyry structure.

Rock type: 
Age: 
50 millions years

Dyke granodiorite porphyry. Sikhote-Alin series of Eocene subintrusions. Eocene. The dyke has a length of about 800 m. The maximum thickness is 150 m. It has a submeridional strike (Az. 350 degrees). Az pad. 80 degrees. Angle of 70-80 degrees. Wedges out on both flanks splitting into several small bodies. Pledged by a series of faults, traceable after wedging out of the dyke in siltstones. In the upper part, granodiorites are intensively weathered to a completely disintegrated weathering crust.

Rock type: 
Age: 
50 millions years

Dyke diorite porphyrite. Sikhote-Alin series of Eocene subintrusions. Eocene. The thickness of the dikes varies from 1 to 20 m, sometimes reaching 70 m, the length rarely exceeds 500 m. The studied contacts of the dikes have steep angles (70-80 degrees) of incidence, and contact alteration are expressed in weak keratinization of rocks to a width of 5-10 cm. Consist: phenocrysts 20-25% - plagioclase, hornblende; the bulk 75-80% - plagioclase 30-35%, dark-colored mineral (hornblende?) 15-20%, quartz up to 1%. Accessory: apatite, sphene. δπ₽2

Rock type: 
Age: 
86 millions years

Quartz Diorite Dyke. Dark gray, evenly grained rocks, massive texture. Consist: andesine up to 80%, augite up to 20%, quartz 10-12%, K-spar 0-6%. Accessory: apatite, zircon. Cretaceous. γδK2