ABSTRACT

This paper presents an 1:20,000 geological map and cross-sections of the Cortes de Pallás diapir (eastern Iberia). This structure is located at the junction of the Iberian Chain and the Betic Cordillera, in the northernmost part of the eastern Prebetic Zone. The diapir is an ENE to NE oriented saltwall, parallel to the regional structural trend of the Betic Cordillera. Our results support the hypothesis of a polyphase tectonic evolution from Oligocene to Pliocene times: (a) An extensional phase, Oligocene–Early Miocene in age, in which the graben system formed and the diapir rose. (b) A Middle Miocene compressive phase characterized by at least the partial closure of the diapir and thrusting of its old southern margin over the previous half-graben infill. (c) Finally, a Late Miocene–Pliocene extensional phase in which, synchronous to the normal faulting in the graben system, the diapir was reactivated and cut the previous structures.

摘要

本文介绍了1：200 000的地质图和Cortes dePallásdiapir（伊比利亚东部）的剖面。该结构位于伊比利亚链与贝蒂科迪勒拉的交界处，位于东部贝贝特地区的最北端。底辟是一种从ENE到NE的盐墙，与Betic Cordillera的区域结构趋势平行。我们的结果支持从渐新世到上新世时代的多相构造演化的假说：（a）伸展期，渐新世-早中新世，其中grab陷系统形成并且底辟上升。（b）中新世中期压缩相，其特征在于，该底辟至少是部分闭合的，并且将其旧的南缘推入了先前的半粒状岩心。（c）最后是中新世-上新世晚期伸展阶段，