Magmatic Evolution and Petrogenesis in the East African Rift System
Magmatic Evolution and Petrogenesis in the East African Rift System
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DOI：
10.1007/978-3-642-73966-8_5
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
A. B. Kampunzu;P. Mohr
中科院分区：
文献类型：
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作者：
A. B. Kampunzu;P. Mohr
东非裂谷系提供了最好的例子，说明年轻、丰富和多样的火山活动与大陆板块的分裂密切相关。这些火山岩中大量的碱性-超碱性特征，以前曾被普赖尔（1903）、芬克（1906，1912）、拉克鲁瓦（1906，1930）、基尔施施泰因（1920）、霍姆斯和哈伍德（1932）注意到，直到鲍恩（1938），已经成为该省的标志。继大陆裂谷火山作用第一次现代综合研究之后的20年里，这一特征得到了认可（例如。G. Harris 1969; Gass 1970; King 1970; Bailey 1974）。因此，与世界上其他裂谷和古裂谷有关的碱性火山作用被认为与东非的典型例子是一致的，并已成为形成大陆裂谷地球动力学假说的一个重要因素。
The East African rift system provides the best example of youthful, profuse and varied volcanism in intimate association with the splitting apart of a continental cratonic regime. The alkaline-ultraalkaline character of a significant volume of these volcanics, previously adverted to by Prior (1903), Finckh (1906, 1912), Lacroix (1906, 1930), Kirschstein (1920), Holmes and Harwood (1932), leading up to Bowen (1938), has tended to become the hallmark of the province. This character has been endorsed through the 2 decades following the first modern syntheses on continental rift volcanism (e. g. Harris 1969; Gass 1970; King 1970; Bailey 1974). Thus alkaline volcanism associated with other rifts and paleorifts of the world is taken to be consistent with the East African type-example, and has become an important factor in formulating geodynamic hypotheses of continental rifting.