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Seismic site characterization of the proposal ICDP drilling project in the Baza Basin (Southern Spain)

巴扎盆地（西班牙南部）拟议 ICDP 钻探项目的地震现场特征

基本信息

批准号：
235757242
负责人：
Dr. Christian Haberland
金额：
--
依托单位：
Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum (GFZ)
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/235757242?language=en
关键词：
Seismic site characterization proposal ICDP

项目摘要

The intra-mountain Baza Basin in Southern Spain is the largest of the Late Neogene continental basins of the Betic Cordillera. It provides an up to 2.5 km thick archive of lacustrine and ancillary continental deposits from the Late Miocene to Middle Pleistocene. Infilling of the Baza Basin proceeded mainly by deposition of fine-grained deposits arranged in concentric facies belts in a lake complex. The expansion and contraction of these nested paleoenvironments serve as highly sensitive indicators of climate change which makes the Baza Basin a unique site for an integrated paleoclimate-oriented study of the last 7Ma of SE Europe. The planned LARSEI drilling project (LAcustrine Record of SE Iberia; submitted pre-proposal to ICDP) proposes to drill the Baza evaporitic basin in order to establish a realistic paleo-climatic record through the final Neogene (including the entire Pliocene) that very likely reflects regional events in the western Mediterranean as well as global climate milestones. Prerequisite for the drilling activities is the profound knowledge of the basin structure and local zones of neo-tectonic deformation, mainly related to the Baza fault bounding the basin to the West. We propose to aquire seismic multichannel profiles providing high-resolution images of the basin and related structural units (i.e. faults). The results of these measurements will both help to guide the drilling activities (including drilling site selection; presite study) and to better understand the structure and evolution of the Baza basin.

位于西班牙南部的巴扎山内盆地是贝蒂斯科迪勒拉山脉新近纪晚期最大的大陆盆地。它提供了从晚中新世到中更新世的湖相和附属大陆沉积物的厚达2.5公里的档案。巴扎盆地的充填主要是通过在湖泊复合体中的同心相带中排列的细粒沉积物的沉积进行的。这些嵌套的古环境的扩张和收缩作为气候变化的高度敏感的指标，这使得巴扎盆地的一个独特的网站，为综合古气候为导向的研究的最后7 Ma的东南欧。计划中的LARSEI钻探项目（东南伊比利亚的LAcustrine记录;已提交ICDP的预提案）建议钻探巴扎奥陶里斯特盆地，以建立一个真实的古气候记录，通过最后的新近纪（包括整个上新世），这很可能反映了地中海西部的区域事件以及全球气候里程碑。钻探活动的前提是对盆地结构和新构造变形的局部带有深刻的认识，主要与盆地西部的巴扎断裂有关。我们建议获取地震多道剖面，提供盆地和相关构造单元（即断层）的高分辨率图像。这些测量的结果将有助于指导钻探活动（包括钻探地点的选择;预现场研究），并更好地了解巴扎盆地的结构和演变。