Additional pre-survey for the project "Establishing a reference profile for fast-spreading oceanic crust: Petrology and geochemistry of the Wadi Gideah cross section in the Oman ophiolite"

“为快速扩张的洋壳建立参考剖面：阿曼蛇绿岩中 Wadi Gideah 横截面的岩石学和地球化学”项目的额外预调查

• 批准号: 214445455
• 负责人: Professor Dr. Jürgen Koepke
• 金额: --
• 依托单位: Institut für Mineralogie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/214445455?language=en
• 关键词: Additional; pre; survey; project; Establishing

Fast-spreading oceanic crust covering a large part of our planet is regarded as layered and homogenous. In spite of tremendous efforts by ship-based research, a complete modern chemical/petrological profile based on natural samples is still missing. In order to establish a reference profile through fast-spreading oceanic crust, the drilling mission "Oman Ophiolite Drilling Project" was established in in the Internatioanal Program ICDP in 2011, and a complementary proposal "Establishing a reference profile for fast-spreading oceanic crust: Petrology and geochemistry of the Wadi Gideah cross section in the Oman ophiolite" was submitted by a group of PI's to the SPP "Internationales Kontinentales Bohrprogramm (ICDP)" with the applicant of this proposal as main PI. Within that project we focus on (1) petrography and phase analytical studies, (2) bulk-analytical characterization, (3) quantifying sulfur cycling and (4) characterizing the evolution of hydrothermal alteration with depth by using Sr and O isotopes. This profile will be unique in terms of completeness of the crustal components and quality and coherence of analytical data to be obtained and will perfect support the ICDP Oman Ophiolite Drilling Project. The small proposal submitted here is aimed to complete our sample collection for the profile, by pre-investigation of additional samples obtained in a recent fieldtrip performed in the Wadi Gideah in February 2011. These additional samples are necessary to fill gaps of our main profile.

快速扩张的海洋地壳覆盖了我们地球的大部分地区，被认为是分层和同质的。尽管基于船舶的研究做出了巨大努力，但仍然缺少基于天然样品的完整的现代化学/岩石学剖面。为了建立快速扩张洋壳的参考剖面，2011年在国际大洋钻探计划中设立了“阿曼蛇绿岩钻探项目”的钻探使命，并提出了一项补充建议“建立快速扩张洋壳的参考剖面：阿曼蛇绿岩中Wadi Gideah横截面的岩石学和地球化学”由一组PI提交给SPP“Internationales Kontinentales Bohrprogramm（ICDP）”，本提案的申请人为主要PI。在该项目中，我们专注于（1）岩相学和相分析研究，（2）整体分析表征，（3）量化硫循环和（4）通过使用Sr和O同位素表征热液蚀变随深度的演化。该剖面在地壳成分的完整性以及所获得的分析数据的质量和一致性方面将是独一无二的，并将完美支持ICDP阿曼蛇绿岩钻探项目。此处提交的小型提案旨在通过对最近于2011年2月在Wadi Gideah进行的实地考察中获得的更多样本进行预先调查，完成我们的概况样本收集工作。这些额外的样本是必要的，以填补我们的主要轮廓的差距。