Stratigraphic position and petrochemistry of the Love Cove Group, Glovertown-Traytown map area, Bonavista Bay, Newfoundland, Canada

Dal Bello, Anthony Eugene (1977) Stratigraphic position and petrochemistry of the Love Cove Group, Glovertown-Traytown map area, Bonavista Bay, Newfoundland, Canada. Masters thesis, Memorial University of Newfoundland.

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Abstract

The geology of the Glovertown-Traytown area, Bonavista Bay, Newfoundland, is dominated by the late Precambrian rocks of the Love Cove, the Musgravetown and the Connecting Point Groups. The Love Cove Group, in the map area, is made up of tuffs of acidic, intermediate and basic composition. These rocks are fault bounded and are considered to be the oldest rock in the Bonavista Bay region. Chemically, the Love Cove volcanics display a continental calc-alkaline affinity, similar to that of the Cascades and the Andes. -- The Connecting Point Group consists of shales and greywackes with bands of interbedded basic volcanics. No contact relationships are visible between the Connecting Point and either the Musgravetown or the Love Cove Groups. However, at localities outside the map area, it is seen to lie with angular unconformity beneath the Musgravetown Group. -- The Musgravetown Group is composed predominatly of clastic sediments with a major unit of extrusive volcanic rocks occurring at or near the base. These volcanics, the Bull Arm Formation, are mainly flow-banded rhyolites. Unlike the Love Cove rocks, they display a more alkaline trend in their chemistry. The sediments are mainly terrestrial, formed in fluvial, lacustrine and aeolian environments. Fluvial deposition is responsible for the Cannings Cove and Crown Hill Formations while aeolian and lacustrine deposits form the major portion of the Rocky Harbour Formation. -- The entire map area shows mineral assemblages characteristic of the greenschist facies, mainly transitional between the chlorite and the biotite zones. Structurally, the area is dominated by the Love Cove horst which brings steeply dipping, isoclinally folded, volcanics into contact with more gently dipping sediments of the Musgravetown and Connecting Point Groups.

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