The X11 occurrence is situated at the south end of the Mitchell Range, approximately 40 kilometres southeast of Takla Landing. It comprises occurrences X10 and X11 as outlined by Whittaker (Fieldwork 1982-1, Table 1) which are two of numerous small chromite occurrences located in the range (see 093N 033, 34, 35, 36, 37, 38, 39, 40).

The occurrences comprise small disseminated, aggregate (greater than 75 per cent) and massive chromite nodules and layers which are hosted by allochthonous, serpentinized harzburgite, formerly assigned to the Middle Permian to Late Triassic Trembleur intrusions, and now termed Mississippian to Triassic Oceanic Ultramafites. The intrusion is bound by north-northeast and east-trending lineaments and is both surrounded by, and hosts xenoliths of sedimentary rocks assigned to the Carboniferous to Jurassic Cache Creek Complex. For additional regional geology details, please refer to the Simpson, Bob, and Irish occurrences (093N 033, 34, 35).

This occurrence is described as four aggregate chromite nodules, one massive chromite nodule and one massive chromite nodule with a disseminated chromite rim, all hosted by serpentinized harzburgite. The following table details information concerning each (Fieldwork 1982-1, Table 1):

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 Occurrence     Form        Texture         Trend        Dimensions
    X10         nodule      massive          073           10x3 cms
    X10         nodule      aggregate         -            10x2 cms
   (cont)       nodule      aggregate         -             5x2 cms
                nodule      aggregate         -             4x1 cms
                nodule      aggregate         -           12x12 cms
    X11         nodule      massive/          -         130x100 cms
                            disseminated
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Accessory chromite is also widely disseminated throughout the ultramafic rocks, varying up to two per cent by volume (Fieldwork 1982-1, page 240).

No economic evaluation of this occurrence is known to have taken place.

Work History

Chromite was identified in the area by at least the early 1940s. Little or no other work is reported until at least the 1980s.

In 2004, the area was staked as the IR, PT, PD and OS claims by Ursula G. Mowat and a program of rock and silt sampling and geological mapping was completed. Sampling was reported to be disappointing in that no chromite was located and the rock samples that were analyzed contained no significant values in platinum group elements. Elevated nickel values were encountered in the ultramafics, especially on the IR and PD claims.

In 2009, FPX Nickel Corp. prospected and sampled the area as the Mesa 8-14 claims.