The stratigraphy, structure and petrochemistry of the Clode Sound map area, northwestern Avalon Zone, Newfoundland
The Clode Sound map area (Lat. 48°15’N, 48°39’N and Long. 54°00’W, 54°13’W) is underlain by portions of three major units of late Precambrian age which dominate the northwestern Avalon Zone. They include sedimentary, volcanic, and intrusive rocks of the Love Cove, Connecting Point, and Musgravetown...
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| Format: | Thesis |
| Language: | English |
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Memorial University of Newfoundland
1979
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| Online Access: | https://research.library.mun.ca/6934/ https://research.library.mun.ca/6934/1/EricMauriceHussey.pdf https://research.library.mun.ca/6934/3/EricMauriceHussey.pdf |
| Summary: | The Clode Sound map area (Lat. 48°15’N, 48°39’N and Long. 54°00’W, 54°13’W) is underlain by portions of three major units of late Precambrian age which dominate the northwestern Avalon Zone. They include sedimentary, volcanic, and intrusive rocks of the Love Cove, Connecting Point, and Musgravetown Groups, and the Georges Pond pluton. These rocks form a number of alternating, north trending fault-bounded belts. -- The Love Cove Group has been informally redefined to include some of the sedimentary and volcanic rocks previously referred to the Musgravetown Group (Widmer, 1949; Jenness, 1963) with which it is conformable. The redefined Love Cove Group is divided into three formations. In ascending stratigraphic order these include: -- 1. White Point Formation - a sequence of deformed dominantly pyroclastic subaqueous (?) to subaerial volcanic rocks ranging from basalt to rhyolite in composition, which are intruded by a comagmatic pluton (Georges Pond pluton). -- 2. Thorburn Lake formation - a sequence of variably deformed siltstones, greywackes and related volcanic rocks up to 1300 meters thick which overlie, and are partially equivalent to, the White Point Formation. -- 3. Southwest River Formation (Musgravetown Group of Jenness, 1963) - a subaerial basalt - rhyolite volcanic assemblage and an associated sequence of alluvial-fluviatile sedimentary rocks 1280 meters thick. -- The Connecting Point Group, only locally examined, includes thin bedded marine siltstone and slate. It may be equivalent to portions of the Love Cove Group. The Musgravetown Group, in its type area, unconformably overlies the connecting point Group. It includes in ascending order: 1. The Cannings Cove Formation (530 meters) - locally derived fanglomerates, sandstones and basalt flows. 2. Clode Sound Formation (Bull Arm Formation of Jenness, 1963) (800-2300 meters): subaerial basalt/pantellerite volcanic sequence, and 3. Charlottetown Formation: fluviatile red beds. -- The Georges Pond pluton is genetically related to the White Point ... |
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