Images of massive magmatic intusive rocks

Horizontal viens and diagonal veins

Veins of quartz can be seen at the top of the photo as slightly-green, wrinkled layers with holes (vuggy quartz). The veins are 10mm to 50mm in thickness and many metres in length. The veins are in a massive dark intrusive rock, called gabbro.

Example of quartz veins

The veins in this rock have sparkles of silica crystals (siliceous), as well as large cavities which formed when the liquid veins cooled (vuggy silica). Apart from the white quartz, there are multiple narrow bands of light and dark layers to the left of the quartz veins, which means that the liquid (and accompanying metals) were injected under pressure on repeated occasions. Small blobs of visible yellow metal were observed in several rocks (not seen here). These metallic blobs appear to be gold, but we will wait until the rocks have been assayed by ALS.

Quartz veins in massive intrusions

This photo shows vertical light-coloured quartz veins which have intruded into gabbro, the darker rock. Gabbro came up as a hot liquid plume from many thousands of kilometres below the surface about 300 million years ago. These quartz veins are 100mm to 200mm wide and they intruded after the gabbro had cooled.

Nowendoc Minerals

Images of massive magmatic intusive rocks

Horizontal viens and diagonal veins

Example of quartz veins

Quartz veins in massive intrusions