Geology Reference
In-Depth Information
Fig. 4.10 Illustration of the origins of proximal and distal SEDEX deposits (Modified from
Goodfellow and Lydon
2007
)
Another striking feature of a SEDEX deposit is the banding displayed in many
ores. In the samples shown in Fig. 1.6a and b the alternation of bands of light-
coloured sulfides and darker silicates is clearly visible. The form and structure of the
bands strongly resembles fine sedimentary bedding, as in chemical sediments such as
cherts or banded iron formations, and this resemblance has led many workers to
interpret the ores as sedimentary-exhalative in origin: i.e. they are interpreted as
Search WWH ::
Custom Search