By Ian W. D. Dalziel, Krzysztof Birkenmajer, Constantino Mpodozis, Victor A. Ramos, Michael R. A. Thomson
About The Product
Published via the yankee Geophysical Union as a part of the Field journey Guidebooks Series.
The Scotia Ridge is the east-closing arcuate submarine topographic excessive linking the Andean Cordillera of South the USA to the Antarctic Peninsula (Fig. 1.1). The ridge emerges from the ocean to shape small yet rugged islands: South Georgia at the North Scotia Ridge (Figs. 1.2 and 2.1; Pl. 1.1). All of those are displaced components of the South American continent (South Georgia) or the Antarctic Peninsula (South Orkney and South Shetland Islands). The South Sandwich Islands that shut off the Scotia Ridge within the east represent one of many least mature intraoceanic island arc structures of the area. 8 of the 11 islands within the arc are almost immediately volcanically lively (Pl. 1.2).
Content:
Chapter 1 creation (pages 1–4):
Chapter 2 Plate Tectonic atmosphere (pages 4–9):
Chapter three historical past of Indian Habitanon and of Exploration, Discovery and learn (pages 9–19):
Chapter four Tectonic Evolution of the Scotia ARC area (pages 19–36):
Chapter five Transit to Cordillera Darwin and Canal Beagle (pages 37–40):
Chapter 6 Cordillera Darwin (pages 42–64):
Chapter 7 Transit to Bama Nassau (pages 64–65):
Chapter eight Tortuga Opidolite complicated (Contribution by way of D. Elthon and W. I. Ridley) (pages 65–71):
Chapter nine Peninsula Hardy of Isla Hoste (Contribution by way of R. E. Hanson) (pages 71–76):
Chapter 10 Transit to Islas Diego Ramirez (page 76):
Chapter eleven Islas Diego Ramirez (Contribution by way of T. J. Wilson, R. E. Hanson and A. M. Grunow (pages 76–81):
Chapter 12 Transit of Drake Passage (pages 81–94):
Chapter thirteen Elephant Isla?N crew (Contribution through I. W. D. Dalziel, A. M. Grunow and R. A. J. Trouw) (pages 95–113):
Chapter 14 Transit to King George Island (pages 113–114):
Chapter 15 King George Island (pages 114–127):
Chapter sixteen Transit of Bransfield Strait (page 127):
Chapter 17 Trinity Peninsula and James Ross Island zone (Contribution through M. R. A. Thomson) (pages 127–137):
Chapter 18 Transit of Southeastern Bransfield Strait, Gerlache Strait, and Neumeyer Channel (page 137):
Chapter 19 Anvers Island zone (pages 137–146):
Chapter 20 Transit of southern bransfield strait (page 146):
Chapter 21 Deceptionisland (Contribution through J.L. Smellie) (pages 146–152):
Chapter 22 Livingston Island (pages 152–157):
Chapter 23 Smith Island (Contribution by way of A. M. Grunow, I. W. D. Dalziel, and R. A. J. Trouw) (pages 157–165):
Chapter 24 Transit of the Antarctic Continental Margin and Southwestern Drake Passage (pages 165–167):
Chapter 25 jap Tierra Del Fuego and Isla De Los Estados (Contribution through I. W. D. Dalziel and V. A.Ramos) (pages 168–178):
Chapter 26 destiny learn: difficulties and power (page 179):
Chapter 27 Acknowledgments (pages 179–181):
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Extra info for Tectonics of the Scotia Arc, Antarctica: Punta Arenas, Chile to Ushuaia, Argentina January 1-February 1, 1989
Sample text
3). Green schists are also common in the basement. They appear to represent metavolcanic layers of various primary compositions and suggest proximity to a Gondwanaland margin magmatic arc, unless they are cover rocks structurally intercalated with the basement in the midCretaceous compression discussed below. There are no reliable radiometric dates from the basement of Cordillera Darwin. , 1981b). The basement rocks are typical of"basement" in the Scotia Arc region generally that contains late Paleozoic to early Mesozoic fossils and was deformed and metamotphosed before the deposition or extrusion of the Upper Jurassic Tobifera Fonnation, the Lower Cretaceous Zapata Fonnation, or their equivalents.
Eocene. At approximately 50 Ma (Fig. 2d) the spreading configuration underwent a major change. The AntarcticBellingshausen spreading center was eliminated and a piece ofthe Aluk plate was incorporated into the Antarctic plate so that the latter was significantly enlarged in this region. Subduction of the Alule plate along the West Antarctic margin appears to have ceased as far east as the base ofthe Antarctic Peninsula. Eocene to Oligocene. The plate configuration was fairly stable through this time interval.
Flysch-like sedimentation in foredeep; development of fault and fold-thrust belt; arc magmatism; strike-slip faulting. Widespread intrusion of calcalkaline plutons; flysch-like sedimentation in foredeep. :Defonnation of variable intensity and style in marginal basin and adjacent continental margin; inception of uplift of arc and marginal basin terranes; downwarp of Magallanes basin ("foredeep") in foreland. continuing erosional uplift of Cordillera; arc and back-arc magmatism; strike-slip faulting; glaciation.