Passive margins: overview
نویسندگان
چکیده
منابع مشابه
Volcanic passive margins: another way to break up continents
Two major types of passive margins are recognized, i.e. volcanic and non-volcanic, without proposing distinctive mechanisms for their formation. Volcanic passive margins are associated with the extrusion and intrusion of large volumes of magma, predominantly mafic, and represent distinctive features of Larges Igneous Provinces, in which regional fissural volcanism predates localized syn-magmati...
متن کاملEdge-modulated stagnant-lid convection and volcanic passive margins
[1] The initial oceanic crust along volcanic passive margins is a factor of 3 greater than that of typical oceanic crust (20 versus 6–7 km). Convection driven by the edge of the continental lithosphere may cause mantle material to circulate through the shallow zone of significant melting beneath the nascent ocean basin and cause the volume of melted mantle to exceed that required to replace the...
متن کاملChapter 8 Tropical Margins 8 . 1 An Overview of Tropical Margins
On our planet, the ocean margins between the Tropic of Capricorn (23◦ 27′ S) and the Tropic of Cancer (23◦ 27′ N) are directly below the sun and are consequently warmer than other parts of the earth. Higher solar energy inputs are about the only rational (but still contested) explanation for the orders of magnitude greater biological species diversity (Allen et al., 2002; Algar et al., 2006) an...
متن کاملAn Overview of Passive Vision Techniques
This section surveys passive optical techniques for recovering scene shape and reflectance characteristics from images. The objective is to acquire images of a scene observed from different viewpoints and possibly different illuminations, and from these images to compute scene shape and reflectance at every surface point. Given estimates of shape we can fabricate duplicate 3D models using techn...
متن کاملThe importance of structural softening for the evolution and architecture of passive margins
Lithospheric extension can generate passive margins that bound oceans worldwide. Detailed geological and geophysical studies in present and fossil passive margins have highlighted the complexity of their architecture and their multi-stage deformation history. Previous modeling studies have shown the significant impact of coarse mechanical layering of the lithosphere (2 to 4 layer crust and mant...
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ژورنال
عنوان ژورنال: Geological Society, London, Petroleum Geology Conference series
سال: 2010
ISSN: 2047-9921
DOI: 10.1144/0070823