Facies Structure and Quantitative Parameters of the Pleistocene Sediments of the Andean Submarine Margin

被引：1
作者：
Levitan, M. A. [1 ]
Gelvi, T. N. [1 ]
Domaratskaya, L. G. [1 ]
机构：
[1] Russian Acad Sci, Vernadsky Inst Geochem & Analyt Chem, Ul Kosygina 19, Moscow 119991, Russia
来源：
GEOCHEMISTRY INTERNATIONAL | 2020年 / 58卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
bottom sediments; sedimentary basins; Andes; continental slope; shelf; upwelling; Eopleistocene; Neopleistocene; areas; volumes; dry sediment mass; mass of sediments per time unit; terrigenous sediments; diatoms; PACIFIC;
D O I：
10.1134/S0016702920030076
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The lithological-facies zonality of the Neo- and Eopleistocene sediments from two main areas of the Andean submarine margin is described for the first time. Processing of corresponding maps and isopach schemes using A.B. Ronov's volumetric method made it possible to calculate the quantitative parameters of sedimentation for distinguished types of Pleistocene sediments. Terrigenous sedimentation predominated and was intensified during the Pleistocene. The accumulation of biogenic opal in form of diatom frustules was more intense in the Eopleistocene than in the Neopleistocene. This is related to the activation of the Peruvian upwelling caused by the upwelling of the Antarctic Intermediate Water.
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页码：435 / 446
页数：12
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