REPORT OF ACTIVITIES ON DIAMOND DISCOVERIES INTERNATIONAL PROPERTY DDI 3 IN THE TORNGAT MOUNTAINS. GM 59665, 2002. 29 pages.
MAZEROLLE, G. J.



Résumé

The geology of this property in the area of the "H" dyke is very complex. Complex faulting, folding along with what appears to be unusual intrusive rocks, in conjunction with the close proximity to the kimberlite "H" dyke could conceal a kimberlite pipe under any of the dozen or so lakes in the area. The geology around the Champagne Pipe is simpler on the regional scale. The detail of the various phases of the kimberlite intrusive will require close contamination of all the outcrops in the pipe blast zone to be able to detect the subtleties hidden by the weathered rock surface. It is fortunate that the Quebec department of mines has published their geology map of this area in October 2001. The information contained on it will be valuable in interpreting the distribution of indicator minerals in the drainage systems on the property and in aiding with putting the discoveries into a regional context. These two areas of the property may be linked since both the "K" and "H" dykes have the same strike direction and are in near alignment over the 10 kms that separates them. Each of the areas will need to be treated as separate exploration targets because of the vertical Western Wall of Mountain Creek West. The MCW valley has till cover in parts of it, which would lend itself to narrowing the search for pipes by sampling this media for diamond indicator minerals in a systematic box grid. The plateau to the west and south lacks till and is scree covered some of which is coarse. Dykes are easily hidden under this debris. Detailed ground magnetometer surveys will be needed to locate targets under this cover. Insufficient sampling of the various facies of the pipe was done in 2001. The dyke complex extending to the south can now be investigated and sampled. Initially samples of 20 kgs should be enough to indicate the presence of diamonds in the phases of the pipes rocks or at fixed intervals along dykes. Samples should also be taken in areas where the ground magnetic survey indicates there may be a "blow". Till samples in the valley floor would indicate the near presence of buried kimberlite bodies. Since one of the key signs of the presence of kimberlite dykes is the grassy cleft in the rocks, exploration at this elevation on the property needs to be done on the ground, by taking systematic till samples or using a ground magnetometer as described below since grass is generally absent. The magnetometer used in walking mode is a very good tool in following invisible kimberlitic dykes once they disappear under the extensive boulder fields at these higher elevations. It should be used to follow the south extension of the known kimberlite dyke. It can also be used to locate narrow steep gradient magnetic features that are magnetic dykes but may be diabase dykes. An experienced operator should be able to find the more resistant diabase as float on the surface and enter this fact in his field notes. It is possible to rent a magnetometer that has a built in GPS. If this machine is used along with its base station magnetometer, collected data can be correction for its position and diurnal magnetic variation at the same time. The precision of the data and location are top quality and are completed in minutes rather than days. Such a dedicated base station magnetometer also has a base station GPS capability. This corrects the GPS fields point to accuracy in the meter range. This would eliminate the need to construct extensive grids in the field. Grid construction in this region takes three times longer than below the tree line. The savings in detailed grid construction costs will easily justify the rental and use of such equipment. Grids can be reduced to witness markers done in paint or with ribbons. In areas of snow, pickets could still be used. A computer with appropriate software and an operator familiar with the system will be needed to give daily feedback on likely targets for the crew to focus on the next day.

Détails

Type de document

Document des compagnies d'exploration minière
Travaux statutaires

Domaine d'activité

Géologie générale
Géochimie
Divers

Type de levé

Évaluation technique
Levé géologique
Analyse de sédiments de ruisseaux
Minéraux industriels

Renvoi

Voir aussi GM 59661
Voir aussi GM 59662
Voir aussi GM 59663
Voir aussi GM 59664
Voir aussi GM 59666

Type de document

Document des compagnies d'exploration minière
Travaux statutaires

Domaine d'activité

Géologie générale
Géochimie
Divers

Type de levé

Évaluation technique
Levé géologique
Analyse de sédiments de ruisseaux
Minéraux industriels

Renvoi

Voir aussi GM 59661
Voir aussi GM 59662
Voir aussi GM 59663
Voir aussi GM 59664
Voir aussi GM 59666