Paleogeographic Development of South America
Paleogeographic Development of South America
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南美洲的古地理发育
DOI：
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发表时间：
1962
期刊：
影响因子：
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通讯作者：
H. J. Harrington
中科院分区：
文献类型：
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作者：
H. J. Harrington
南美洲的后元古代地质历史受某些主要大地构造单元的分布和相互作用的控制，这些单元分为五组，它们构成了该大陆的结构框架：克拉通（圭亚那、巴西中部和巴西沿海地盾），大洋间盆地（亚马逊、帕尔奈巴、圣弗朗西斯科和巴拉那），克拉通周边盆地（Llanos-Iquitos-Acre-Beni-Chaco-Pampas plains），nesocraton（Pamerican Ranges，Patagonia，and Deseado Rangefs），and geosynclines（Andean belts）.早寒武世以来，中克拉通区和中克拉通区一直保持稳定-亚稳定的正向趋势，克拉通间区和克拉通围区表现出垂向亚稳定-亚活动性和间歇但递减的亚负向趋势，西部地槽带表现出强烈的移动的变形性和周期性的负向趋势，它们是大陆主要的沉积-构造-岩浆活动区。本文总结了南美洲自寒武纪以来的古地理发展，共46幅地图，33幅图，涵盖了不同的地质段。区分了海相、陆相和混合相或半咸水相，并绘制了火山和冰川堆积的主要区域。解释性文字--基本上是不同地层单位主要暴露区域的列表--简要地提到了主要的地壳运动、火山活动和冰川活动。
The post-Proterozoic geologic history of South America was controlled by the distribution and interplay of certain major geotectonic units, classed in five groups, which form the structural framework of the continent: cratons (Guiana, Central Brazilian, and Coastal Brazilian shields), intercratonic basins (Amazonas, Parnaiba, Sao Francisco, and Parana), pericratonic basins (Llanos-Iquitos-Acre-Beni-Chaco-Pampas plains), nesocratons (Pampean Ranges, Patagonia, and Deseado massifs), and geosynclines (Andean belts). Since Early Cambrian time the cratonic and nesocratonic areas have maintained stable to substable positive tendencies, the intercratonic and pericratonic areas have shown vertical sub-stability to submobility with intermittent but decreasing subnegative tendencies, and the western geosynclinal belts have been highly mobile, deformable elements with recurrent negative tendencies, which have witnessed the main sedimentary-tecto-magmatic activity of the continent. The paleogeographic development of South America since Cambrian time is summarized in 46 maps arranged in 33 figures, covering different geological intervals. Marine, continental, and mixed or brackishwater facies are differentiated, and the main areas of volcanic and glacial accumulation are plotted. The explanatory text-essentially a list of the main areas of exposure of the different stratigraphic units--makes brief references to the main diastrophic, volcanic, and glacial episodes.