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.

西班牙南部的山内巴扎盆地是贝蒂科迪勒拉新近纪晚期最大的大陆盆地。它提供了厚达 2.5 公里的晚中新世至中更新世的湖泊和附属大陆沉积物档案。巴扎盆地的充填主要是通过在湖泊复合体中排列成同心相带的细粒沉积物的沉积进行的。这些嵌套古环境的扩张和收缩是气候变化的高度敏感指标，这使得巴扎盆地成为对欧洲东南部最后 7 Ma 进行古气候综合研究的独特地点。计划中的 LARSEI 钻探项目（伊比利亚东南部 LAcustrine 记录；向 ICDP 提交预提案）建议钻探 Baza 蒸发盆地，以便在最后的新近纪（包括整个上新世）建立真实的古气候记录，这很可能反映了西地中海的区域事件以及全球气候里程碑。钻探活动的先决条件是对盆地结构和局部新构造变形区域有深入的了解，主要与盆地西部边界的巴扎断层有关。我们建议获取地震多道剖面，提供盆地和相关结构单元（即断层）的高分辨率图像。这些测量结果将有助于指导钻探活动（包括钻探地点选择；现场研究），并更好地了解巴扎盆地的结构和演化。