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"

覆盖地球大部分地区的快速扩张的洋壳被认为是层状和均质的。尽管船基研究付出了巨大的努力，但基于天然样品的完整的现代化学/岩石学剖面仍然缺乏。为了通过快速扩张的洋壳建立参考剖面，2011年在国际海底岩浆计划(ICDP)中设立了钻探任务“阿曼蛇绿岩钻探项目”，并由一组PI向SPP“International Kontinentales BohrProgram m(ICDP)”提交了补充提案“建立快速扩张洋壳的参考剖面：阿曼蛇绿岩中Wadi Gideah剖面的岩石学和地球化学”，该提案的申请者是主要的PI。在该项目中，我们侧重于(1)岩相学和物相分析研究，(2)整体分析表征，(3)硫循环的量化，以及(4)利用锶和氧同位素表征热液蚀变随深度的演化。这一剖面在地壳成分的完整性和将要获得的分析数据的质量和一致性方面将是独一无二的，并将完美地支持国际地球科学中心阿曼蛇绿岩钻探项目。在此提交的小建议旨在通过对2011年2月在Wadi Gideah进行的最近一次实地考察中获得的额外样本进行预调查，完成我们对侧写的样本收集。这些额外的样本是必要的，以填补我们的主要简介的空白。

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.