Skip to main content
padlock icon - secure page this page is secure

Morphology and electron-probe microanalysis of residual gold-grains at Dimako, Southeast Cameroon

Buy Article:

$39.00 + tax (Refund Policy)

The morphology and chemistry of residual gold in the area around Dimako, Southeast Cameroon, are studied for the first time. The gold occurs in saprolite and nodular horizons of an extensive weathering blanket. The saprolite studied has 37 ± 22 ppm Au. The gold grains are irregular and dendritic in the deeper horizons but get progressively oblong, rounded, blunt, smooth and pitted up the profile. Gold grains from all horizons show remarkable core-to-rim zonation. The cores are relatively silver rich (11–15 wt % Ag) while the rims are very poor in silver (0 to ∼4 wt % Ag) and quite commonly attain fineness of close to 1000. Significantly, zoning is exhibited by grains from all horizons. Chemically purified silver-free homogeneous gold particles are not restricted to the higher, more evolved horizons. The gold particles are mostly residual. Reprecipitation of supergene gold as submicron/micron-sized gold adsorbed on clay contributes up to 50%.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: CAMEROON; CHEMISTRY; CORE-TO-RIM ZONATION; FINENESS; MORPHOLOGY; RESIDUAL GOLD; WEATHERING BLANKET

Document Type: Regular Paper

Publication date: June 1, 2003

More about this publication?
  • Beginning with 2005, Neues Jahrbuch für Mineralogy (Abhandlungen) publish all papers formerly submitted to the two subjournals Abhandlungen and Monatshefte.
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more