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Title:
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Stratigraphic and structural evolution of the western Malvinas and southeastern Magallanes basins, Argentina |
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Author:
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Galeazzi, Jose Sebastian |
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Advisor:
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Vail, Peter R. |
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Degree:
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Master of Arts thesis |
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Abstract:
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The area evolved from a Jurassic rifting stage to a Cretaceous sag and a Tertiary foredeep stage.
The sedimentary record is subdivided into four tectonostratigraphic units: Jurassic rift deposits, late-Jurassic-Cretaceous sag deposits, latest Cretaceous-Eocene foredeep-transition deposits, and late Eocene-Pliocene foredeep deposits. The rifts are filled with continental volcanics and pyroclastics. The sag deposits form a backstepping marine wedge, which contains the Springhill Formation (main reservoir) and is covered by a muddy and marly aggradational interval deposited in neritic waters of an epeiric sea (main petroleum source and seal). The latest Cretaceous to Eocene is a forestepping-backstepping wedge of glauconitic sandstones and claystones and carbonate buildups of shallow marine origin. The foredeep deepens during the late-Eocene to Oligocene. It is infilled during the Oligocene-late Miocene by a forestepping wedge that prograded from the west and southwest.
The age of the foredeep suggests that the southern Andean Orocline formed during the Paleocene-late Eocene interval. |
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Citation:
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Galeazzi, Jose Sebastian. "Stratigraphic and structural evolution of the western Malvinas and southeastern Magallanes basins, Argentina." Masters Thesis, Rice University, ETD http://hdl.handle.net/1911/13833. |
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Citable link to this page:
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http://hdl.handle.net/1911/13833 |
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Date:
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1994 |
