The Seguin-Kenning Property is located approximately 25 km northwest of Power Metals' cesium/lithium discovery area, within the Case Batholith, and about 75 km northeast of Cochrane, Ontario.
The Case Batholith, which is an extensive 50 km by 85 km ovoid granitic complex, is part of the Optica Subprovince (
SV04-01//SV04-01), and is a weakly foliated biotite granodiorite to quartz monzonite. On the Case Lake Property of Power Metals, the main components in the granodiorite are quartz (20%), feldspar (70%) and biotite (10%) (
Assessment report 32E04SW2002).
In referring to the Bouger Gravity
Map 2594, it will be noted that the eastern half of the Case Batholith shows a gravity low, while the western half exhibits a higher gravity response. Note the intensive gravity low within the eastern tip of the Case Batholith, including the area in the vicinity of Power Metals' cesium-lithium discovery. My take on this geophysical phenomena, is that the eastern half of the Case Batholith has a lower density, while the western half being somewhat higher. That being said, and I'm not an expert, I think that the volatile melt of the granodioritic magma for the eastern half is more felsic, while the western half is more mafic. In fact, the airborne magnetic total field
Map 2586 shows that a good portion of the granodiorite in the middle (including the Seguin-Kenning Property), and towards the northwest of the Case Batholith, is magnetic, thus more mafic.
Pegmatites are found as irregular
dikes,
sills, or
veins, and are most common
near the margins of
batholiths (great masses of intrusive igneous rock). Most are closely related spatially and genetically to large intrusions. They may also take the form of veins or dikes within the intrusion itself, but more commonly,
they extend into the surrounding country rock, especially above the intrusion. Therefore, it's also my interpretation that the top of the Case Batholith is towards the east.
In the
Recommendations for Exploration 2021-2022 p.27, Peter Chadwick commented that "The geological features in support of rare-element pegmatites within the Superior Province, as described in the previous section, are based mostly on observations made further to the west within the Quetico Subprovince. Rare-element mineralization in the adjacent Opatica Subprovince, which can be found in the northwestern parts of the Kirkland Lake District, is currently known only at the Case pegmatite in the Lake Abitibi area, but this spodumene-subtype pegmatite comprises the fifth largest lithium-rich pegmatite in the Superior Province of Ontario (Breaks, Selway and Tindle 2006)". That said, no doubt there will be more cesium-lithium discoveries made both within the Case Batholith and near its margins.
Referring to
Map P. 3609, the rocks in the general area of the Seguin-Kenning area have been interpreted to be felsic to intermediate intrusive suite rocks, based on the interpretation of the aeromagnetic data. However, on
Map 2453, there are several outcrops in the vicinity of the mid point region of the Kenning/Case Township boundary line. They have been indicated to be granodiorite, with some having pegmatites. It is very likely that similar rocks may be found to the northwest, within the Seguin-Kenning Property. There may also be some patches of quartz monzonite within the Property as well.
Referring to Google Earth, there appears to be a few scattered outcrops in the area, along with older logging clearings. The topography is generally flat, with background about 5m or less in the area of the Property.
Referring to
Map 82815, the Residual Magnetic Field shows is a wide NE/SW magnetic trend with an intensity of approximately 50 nanoTeslas. It has a dimension about 2000m long by 800m wide. However, the Second Vertical Derivative
Map 82826, shows two narrow, parallel trends of approximately 1200m in length. The choppiness of the magnetic responses on the map is possibly due to computer processing algorithm problems (small cell size for contouring the data). These two magnetic trends could be 2 parallel pegmatite dykes. On the north side of the north magnetic trend, there also may be a NE/SW fault that looks to coincide with a river.
As far as I know, there has been no historical work carried out on the Seguin-Kenning Property.