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"

覆盖地球大部分的快速扩张的海洋地壳被认为是层状的和均匀的。尽管船舶研究付出了巨大的努力，但基于自然样品的完整的现代化学/岩石学剖面仍然缺失。为了通过快速扩张的洋壳建立参考剖面，2011年在国际项目ICDP中建立了“阿曼蛇绿岩钻探项目”钻井任务，并提出了“建立快速扩张的洋壳参考剖面：“阿曼蛇绿岩Wadi Gideah剖面的岩石学和地球化学”是由一组PI向SPP“国际大陆玻尔方案（ICDP）”提交的，该提案的申请人是主要PI。在该项目中，我们着重于(1)岩石学和物相分析研究，(2)体积分析表征，(3)硫循环量化，(4)利用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、获得的分析数据的质量和一致性方面将是独一无二的，并将完美地支持ICDP阿曼蛇绿岩钻探项目。这里提交的小提案旨在通过对2011年2月在Wadi Gideah进行的实地考察中获得的额外样本进行预调查，完成剖面的样本收集。这些额外的样品是必要的，以填补我们的主要概况的空白。

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.