US-Switzerland Cooperative Research: Seismic Modeling of Reflective Structures in the Alps and Implications for Orogenic Structure

美国-瑞士合作研究：阿尔卑斯山反射结构的地震模拟及其对造山结构的影响

• 批准号: 8922503
• 负责人: Larry Brown
• 金额: $ 0.96万
• 依托单位: Cornell Univ - State: AWDS MADE PRIOR MAY 2010
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-01 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8922503&HistoricalAwards=false
• 关键词: US; Switzerland; Cooperative; Research; Seismic

This award supports Professor Larry Brown and others of Cornell University to collaborate in geophysics with Professor Jean-Jacques Wagner of the Laboratory of Petrophysics, University of Geneva, and Professor Raymond Oliver, Institute of Geophysics, University of Lausanne. The objective of their joint research is to develop new, more detailed geologic models of orogenic structure by computer modeling of deep seismic data recently collected across the Alps by the Swiss researchers, with support from the Swiss National Science Foundation. The combination of exposure, thorough mapping, availability of multiple seismic lines, and tectonic history make the Alps perhaps the most promising starting point for more quantitative comparative studies of deep structure of orogens as revealed from reflection profiling. Later, the Swiss results will be compared with similar deep structures in Paleozoic and Precambrian orogenic belts in the U.S., which were surveyed under a multi-institutional deep seismic program operated by Cornell University on behalf of COCORP (the Consortium for Continental Reflection Profiling.) Deep seismic reflection profiling has become a standard tool in the investigation of crustal structure. Yet debate persists concerning the actual cause of deep reflectivity. An important development in this field is the relatively recent acquisition of seismic surveys across young mountain belts where a) structures are particularly well exposed and b) reflection patterns can be traced to considerable depth. The Alpine system is perhaps the best example of such a system. Preliminary three dimensional seismic modeling by the Swiss of known Alpine structures, and their extrapolations to depth have proven to be an effective interpretational tool in providing a quantitative test of hypothesized structure in this active region. By analogy, considerable light may be shed upon the crustal architecture of older mountain belts where deep structural interpretations have been more cryptic. Thus this work may make the Alps a prototype for intercontinental collisions and a laboratory for calibration of deep seismic reflection data elsewhere.

该奖项支持拉里·布朗教授和康奈尔大学的其他人 大学与Jean-Jacques教授合作研究地球物理学 日内瓦大学岩石物理实验室的瓦格纳， 哥伦比亚大学地球物理研究所Raymond奥利弗教授 洛桑。 他们联合研究的目标是开发新的， 造山带构造的计算机精细地质模型 最近在阿尔卑斯山收集的深层地震数据建模， 瑞士研究人员在瑞士国家科学院的支持下， 基金会 暴露，彻底的测绘， 多条地震测线的可用性和构造历史使得 阿尔卑斯山也许是最有希望的起点， 造山带深部结构定量对比研究 从反射剖面图中可以看出。 稍后，瑞士的结果将 与古生代类似深部构造相比， 美国前寒武纪造山带在一项调查中， 由康奈尔大学管理的多机构深层地震项目 大学代表COCORP（大陆集团 反射分析。） 深地震反射剖面已成为地震勘探中的标准工具。 地壳结构调查。 然而，争论仍在继续， 深反射率的真正原因。 的一个重要发展 这一领域是相对较新的地震勘探采集 在年轻的山区地带，a）结构特别 良好暴露和B）反射图案可以被追踪到 相当深。 阿尔卑斯山系统也许是最好的例子 这样一个系统。 初步三维地震模拟 瑞士人对阿尔卑斯山已知结构的研究， 已被证明是一种有效的解释工具， 提供了一个定量测试的假设结构，在这个 活动区 通过类比，可以相当清楚地阐明 地壳结构的古老的山区地带， 解释更加神秘。 因此，这项工作可以使 阿尔卑斯山是洲际碰撞的原型， 深地震反射数据校正实验室 其他地方