Support for the Penrose Conference on Arc Crustal Genesis and Evolution; July 9-15, 2006; Valdez, Alaska

支持弧地壳起源与演化彭罗斯会议；

• 批准号: 0632774
• 负责人: Bradley Hacker
• 金额: $ 1.5万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-15 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0632774&HistoricalAwards=false
• 关键词: Support; Penrose; Conference; Arc; Crustal

0632774HackerThis award provides partial support for a Penrose Conference on arc crustal genesis and evolution which will be held in Valdez, in south-central Alaska, from July 9-15, 2006. Presentations will integrate recent results on well-exposed arc crustal sections in the Jurassic Talkeetna arc in south central Alaska, and in the Cretaceous Ladakh-Kohistan arc in northern Pakistan and India with important new developments in active-arc geochemistry, petrology and geophysics. The Talkeetna and Ladakh-Kohistan arcs provide exposures of relatively complete sections from Moho depth (30 to 40 km in both cases), to volcanic rocks and volcaniclastic sediments. Both have been the subject of large, multi-disciplinary Continental Dynamics Program (CD) projects over the past decade, and provide depth sections and temporal progressions that are not accessible in active oceanic arcs. Intensive, recent investigations of arc plutonic suites elsewhere complement these projects. New data from the US MARGINS Initiative, Sierra Nevada Continental Dynamics Projects, Aleutian studies, and similar international initiatives provide constraints on crustal thickness and volcanic fluxes in active arcs. Advances in the study of melt inclusions have dramatically improved understanding of volatiles in primitive arc magmas. Studies of ultra-high pressure metamorphic rocks and new experimental methods have yielded insights into mantle wedge melt generation, and subduction zone dehydration and anatexis. This conference will provide an opportunity to synthesize these results, with a focus on using direct observations of arc crustal sections, from the uppermost mantle to the volcanics, to constrain arc processes and their role in the genesis and evolution of continental crust. The enthusiastic response of keynote speakers, only one out of twenty-four declined the request for letters of commitment, indicates that the time is right for this conference, and that it will attract an excellent group of well informed participants with much to discuss. To complement research presentations, the Conference will include at least two field trips, to accessible outcrops of volcanic and the Moho sections of the Talkeetna arc.

0632774哈克该奖项为将于2006年7月9日至15日在阿拉斯加中南部的巴尔德斯举行的关于弧壳成因和演化的彭罗斯会议提供部分支持。演讲将结合最近在阿拉斯加中南部侏罗纪塔尔凯特纳弧和巴基斯坦北方和印度白垩纪拉达克-科希斯坦弧中暴露良好的弧地壳剖面的结果，以及活动弧地球化学、岩石学和地球物理学的重要新发展。塔尔凯特纳和拉达克-科希斯坦弧提供了从莫霍面深度（两种情况下均为30 - 40 km）到火山岩和火山碎屑沉积物的相对完整的剖面。在过去十年中，两者都是大型多学科大陆动力学计划（CD）项目的主题，并提供了在活跃的海洋弧中无法获得的深度剖面和时间进展。最近对其他地方弧深成岩套的深入调查补充了这些项目。来自美国MARGINS计划、Sierra内华达州大陆动力学项目、阿留申研究和类似国际计划的新数据提供了活动弧中地壳厚度和火山通量的限制。熔融包裹体研究的进展极大地提高了对原始弧岩浆中挥发分的认识。对超高压变质岩的研究和新的实验方法使人们对地幔楔熔体的生成、俯冲带脱水和深熔作用有了新的认识。这次会议将提供一个机会，综合这些结果，重点是使用弧地壳截面的直接观测，从最上层地幔的火山岩，以限制弧过程及其在大陆地壳的成因和演化的作用。24位主旨发言人中只有一位拒绝了提供承诺书的请求，主旨发言人的热烈反应表明，举行这次会议的时机已经成熟，它将吸引一批优秀的、消息灵通的与会者，他们有许多问题要讨论。 为了补充研究演示，会议将包括至少两次实地考察，前往可到达的火山露头和塔尔凯特纳弧的莫霍剖面。