Port Daniel

The Port-Daniel Property is located inside the Gaspésie Peninsula, along the portion of Baie des Chaleurs at approximately 15 km north of the Municipality of Port-Daniel. It overlaps the northern border of the Port-Daniel Wildlife Reserve. It is included in the NTS 22A07.

Geology: (according to Ware et Berger, 1995 and De Broucker, 1987)

The Gaspé Appalachians are subdivided into six tectonostratigraphicareas. This exploration project will focus on the region located within one of these major subdivisions, namely the Maquereau-Mictaw inlier. This inlier is a fault bound, almost circular, 20 km diameter Taconian structure. It displays Cambro-Ordovician rocks that belong to the lithotectonic area of Humber (Maquereau Group) and Dunnage (mixes, Mictaw Group) (Williams, 1978, 1979). In this lithotectonic entity, the unit we are particularly interested in is the Maquereau Group. The Precambrian (from the Grenville age) basement on which the Cambro-Ordovician rocks rest also appears and it consists of two thrust slices, embedded in the fault areas surrounding the inlier. The Maquereau Group (Hadrynian to Cambrian) includes a volcanic-sedimentary sequence that is very folded and metamorphosed, with greenschist facies. This group is made of a complex interdigitation of various lithology (Fig.). De Broucker (1987) subdivides the Maquereau Group into 5 rock units:

  1. Unit 2a: fine sandstone and siltstone laminated grey-gree. This is the predominant unit in which the other units interdigitate, in the form of a lens.
  2. Unit 2b: dark green tholeitic basalts (massive, pillowed, amygdaloidal and epidote nodule) in which interlayers of volcanic sediments are found (the amygdala are mostly filled with calcite and chlorite). These lightly alkaline basalts are low-enriched with copper (60-140 ppm Cu; Bédard et Wilson, 1994). This unit includes a subunit (2bv) of purple amygdaloidal basalt facies (hematized).
  3. Unit 2c: purplish or purple-green arkose with red shale fragments.
  4. Unit 2d: polymictic conglomerate and conglomeratic sandstone.
  5. Unit 2e: purplish-red siltstone and mudstone.

    The Maquereau Group foundations are therefore the Grenville age basement on which the volcanic-sedimentary sequence has settled. This essentially arkosic sequence was established within a shallow continental rift environment, before the opening of the proto-Atlantic Ocean (De Broucker, 1987). The great variations in granulometry inside the opening of the proto-Atlantic Ocean sequence (mudruck with coarse conglomerate) demonstrate the high tectonic instability of the basin. This sequence is probably one of the oldest recognized in Quebec’s Appalachian sequence. The lower part of the Maquereau Group appears in the western part, in the core of the main anticlinal structure. The presence of the conglomerate and volcanic rock highlights major tectonic activity in the source area during the rifting phase. It seems the rocks in the eastern part of the Maquereau Group are a more stable environment. The Maquereau Group is therefore part of the Humber area and would be consequential to the Chic-Chocs Group, because basalts from these two groups are chemically similar in addition to being unusually enriched with copper (Bédard et Wilson, 1994).

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