The Cerro Caquilluco-Cerrillos Negros Giant Rock Avalanches (Tacna, Peru)

被引：7

作者：

Crosta, Giovanni B. ^{[1
]}

Paolo, Frattini ^{[1
]}

Elena, Valbuzzi ^{[1
]}

Hermanns, Reginald L. ^{[2
]}

机构：

[1] Univ Milano Bicocca, Dept Earth & Environm Sci, I-20126 Milan, Italy

[2] Norwegian Geol Survey, Trondheim, Norway

来源：

ENGINEERING GEOLOGY FOR SOCIETY AND TERRITORY, VOL 2: LANDSLIDE PROCESSES | 2015年

关键词：

Rock avalanche; Failure sequence; 3D runout simulation; Peru;

D O I：

10.1007/978-3-319-09057-3_159

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Giant rock avalanches have been recognized and mapped in southern Peru, to the N of Tacna. The Cerro Caquilluco rock avalanche complex has a total volume of about 15 km(3) and a length of 43 km, extending from 3,900 to 530 m a.s.l.. Mapping the internal structures, the scar features and the depositional lobes allowed to suggest that the rock avalanche complex developed as a sequence of successive failures affecting tuffaceous and conglomeratic formations forming a gently dipping monoclinalic slope. Assessment of lobes volume constrained the reconstruction of the source areas for the multiple failures and the successive rock avalanche simulations. Seismic triggering is suggested, whereas H/L vs volume relationships suggest a high mobility comparable to that of extremely mobile volcanic rock avalanches.

引用

页码：921 / 924

页数：4