Magmartic Workshop in the McMurdo Dry Valleys, Antarctica

南极洲麦克默多干谷的 Magmartic 工作室

• 批准号: 0229306
• 负责人: Bruce Marsh
• 金额: $ 38.82万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0229306&HistoricalAwards=false
• 关键词: Magmartic; Workshop; McMurdo; Dry; Valleys

This award, provided by the Antarctic Geology and Geophysics Program of the Office of Polar Programs, supports a field seminar or workshop to examine fundamental aspects of magmatic processes using the Ferrar Supergroup sills in the McMurdo Dry Valleys. The most challenging aspect of understanding planetary magmatism is that so little of the integrated nature of the full magmatic life cycle can be directly examined in any realistic context. Planetary magmatism itself is an integrated, multifaceted process involving a spectrum of interleaved chemical and physical processes. These physical processes are responsible for the chemical transformation of the initial primitive magma into the final evolved erupted product. Each essential physical component can be found well exposed somewhere on Earth, and these components have been studied piece by piece for nearly a century. But is has proven singularly elusive to find and study any reasonable example of the entire process itself in a fully integrated true spatial context. The Ferrar dolerites of the McMurdo Dry Valleys (McM-DV) exhibit in exquisite exposures the detailed three-dimensional structure and evolutionary development of an extensive magmatic system, which formed within Earth?s upper crust some 180 m.y. ago. The McM-DV magmatic system contains, on a manageable scale, all the essential features of major magmatic systems, which elsewhere in the world are commonly seen only in a piecemeal fashion. This system is a unique and an invaluable laboratory in which to study first hand the dynamics of planetary magmatism. Because this unusual area is so inaccessible to most researchers, it is proposed to hold a field workshop here to introduce other researchers to the wonders of the McM-DV field relations, to stimulate cutting edge research, and also to delineate the many fundamental and unsolved problems posed by this magmatic system.A two-week field and laboratory event involving 20-25 researchers will be conducted to study the magmatic processes of the McM-DV magmatic system as a centerpiece to understanding the fundamental mechanics and development of magmatic systems in the most general sense. A working conference is envisioned with sessions split between discussions and laboratory work at McMurdo in the Crary Laboratory and fieldwork in the Dry Valleys. Four magmatic processes will be considered by four research modules:1. Magma Transport and Differentiation in a Mush Column (East Bull Pass)2. Crystal Transport and Sorting in Ponded Magma (East Dais)3. Solidification Front Instability (SFI) in Sills (Pandora's Spire/Solitary Rocks)4. Mechanics of Sill Emplacement (Victoria Valley and East Wright Valley)To provide the widest possible impact on research, both in real time and the long term, participants will be spread among five groups: 1) Researchers working on other parts of the Ferrar system; 2) Senior researchers of layered intrusions and basaltic sills worldwide; 3) Young researchers studying magmatic processes; 4) Researchers of ocean ridge magma chambers and melt sheets; 5) Graduate students in igneous petrology. The involvement of undergraduates is also a real possibility.The bringing together of these workers is intended as a catalyst to enunciating a specific fundamental theme common to all magmatic processes, to understanding the regional dynamics of the Ferrar-Transantarctic magmatic province, and to stimulating strong scientists to new horizons of creativity through exposure to a singular, world class field area.

该奖项由极地方案办公室南极地质和地球物理方案提供，支持一个实地研讨会或讲习班，以研究麦克默多干谷中使用费拉尔超群岩床的岩浆过程的基本方面。理解行星岩浆活动最具挑战性的方面是，在任何现实的背景下，几乎都无法直接研究整个岩浆生命周期的综合性质。行星岩浆活动本身是一个综合的、多方面的过程，涉及一系列交错的化学和物理过程。这些物理过程负责最初的原始岩浆的化学转化为最终的演化喷发产物。每一个基本的物理组成部分都可以在地球上的某个地方找到，这些组成部分已经被一块一块地研究了近世纪。但事实证明，在一个完全整合的真正的空间背景下，要找到和研究整个过程本身的任何合理的例子是非常困难的。麦克默多干谷的费拉尔粗玄岩（McM-DV）以精美的曝光展示了一个广泛的岩浆系统的详细三维结构和演化发展，该系统形成于地球内部。大约1.8亿年前，前MCM-DV岩浆系统在可管理的规模上包含了主要岩浆系统的所有基本特征，这些特征在世界其他地方通常只能以零碎的方式看到。这个系统是一个独特的和宝贵的实验室，在其中研究第一手的动力学行星岩浆。由于这一不寻常的领域是如此难以进入大多数研究人员，建议在这里举行一个实地研讨会，向其他研究人员介绍McM-DV领域关系的奇迹，以刺激尖端研究，并阐明了这一岩浆系统所带来的许多基本的和未解决的问题。将引导25名研究人员研究McM-DV岩浆系统的岩浆过程，作为理解最普遍意义上的岩浆系统的基本力学和发展的核心。一个工作会议的设想与会议之间的讨论和实验室工作分为麦克默多在克拉里实验室和实地考察在干谷。四个岩浆过程将被认为是由四个研究模块：1。岩浆运输和分异在一个糊状柱（东布尔山口）2。结晶运输和分选在池塘岩浆（东戴斯）3。固化前沿不稳定性（SFI）在窗台（潘多拉的尖塔/孤独的岩石）4。槛位力学（维多利亚谷和东赖特谷）为了在真实的时间和长期内对研究产生尽可能广泛的影响，参与者将分为五组：1）研究费拉尔系统其他部分的研究人员; 2）世界各地层状侵入体和玄武岩岩床的高级研究人员; 3）研究岩浆过程的年轻研究人员; 4）洋脊岩浆房和熔融岩片的研究人员; 5）火成岩学研究生。大学生的参与也是一个真实的可能性。这些工作者的聚集旨在作为一种催化剂，阐明一个特定的基本主题，共同所有的岩浆过程，以了解区域动力学的费拉尔-transananacritic岩浆省，并激发强大的科学家，以创造力的新视野，通过接触到一个单一的，世界级的领域领域。