US Egypt Cooperative Research: Comparisons between New Mexico and Egyptian travertines and tufas and their implications for paleoclimate and neotectonic influences on ground water

这个美国和埃及的合作项目是对埃及北方努比亚沙漠的泉水喷口、地下水和地下水与新墨西哥州的格兰德河裂谷的类似泉水进行比较研究。由新墨西哥州大学的卡尔·卡尔斯特罗姆博士领导的美国团队将与埃及苏伊士运河大学的埃及科学家穆斯塔法·塞尔米博士建立新的合作关系。 该项目为美国团队提供了进入新的干旱现场的机会，并将使他们能够扩大对深源流体对地下水质量有害影响的研究。这一合作项目对埃及、美国西部和其他干旱地区的水资源管理具有直接的社会意义，这些地区的人口增长对水资源造成了压力。智力上的优点。 该研究小组将绘制并采样沉积方解石的泉水，因为它们是断层控制的管道系统的表面记录，这些管道系统往往会分割含水层盆地。这些弹簧与内生流体成分（高盐，3 He/4 He，CO2，和金属）的最高值，因此了解参与地下水混合的内生端元的重要性。同时，该化石本身也提供了这些重要地区的古水文学的可定年记录，使用精确的铀系地质年代学。在美国西部和澳大利亚正在进行的研究提供了重要的数据，以解决公众对如何保护和管理常年泉水喷口的担忧，并保护其微妙平衡的生态系统，其中包括特有物种和独特的微生物学。“喷口”一词是在非常字面的意义上使用的，因为PI的总体模型是，这些系统是大陆类似于在海洋裂谷环境中发现的黑色和白色吸烟者。 对这一中美合资企业的支持将使该团队能够扩展和更好地测试该模型，并让两名研究生参与国际研究。美国PI将与苏伊士运河大学合作，通过计划在埃及举办的两个研讨会，帮助建立埃及和国际合作，并由苏伊士运河大学主办。工作计划将遵循Crossey等人的方法，二○ ○六年; 2009年，对努比亚沙漠中许多沉积有方解石的泉水进行测绘和取样，分析水化学以解析二氧化碳来源，分析气体化学（包括惰性气体）以评估地幔和深部地壳衍生流体混入地下水系统的百分比。该项目具有内在的科学意义，有助于了解构造与地下水水质的内生影响之间的联系。它在地下水供应管理、初级科学家培训和国际合作方面具有更广泛的影响。

This US-Egypt collaborative project is a comparative study between spring vents, groundwaters, and travertines in the Nubian Desert of northern Egypt and similar springs in the Rio Grande rift of New Mexico. The US team, lead by Dr. Karl Karlstrom at the University of New Mexico will establish a new collaboration with Egyptian scientist Dr. Moustafa Selmi at Suez Canal University in Egypt. This project provides the US team access to a new arid field site and will enable them to expand their study of the detrimental effects of deeply sourced fluids on groundwater quality. This collaborative project has direct societal relevance for the management of water resources in Egypt, the western US, and other arid regions where population growth places a strain on water resources. Intellectual merit. The research team will map and sample travertine-depositing springs because they are the surface record of fault-controlled conduit systems that tend to partition aquifer basins. These springs are associated with the highest values of endogenic fluid components (high in salts, 3He/4He, CO2, and metals) and hence of importance for understanding the endogenic endmember involved in groundwater mixing. The travertine itself also provides a datable record, using precise uranium-series geochronology, of the paleohydrology of these important regions. Ongoing studies in the western US and Australia have provided important data in addressing public concerns about how to protect and manage perennial spring vents, and protect their delicately balanced ecosystems, which include endemic species and unique microbiology. The term "vents" is used in a very literal sense as the PIs' overarching model is that these systems are continental analogs to the black and white smokers found in oceanic rift environments.Broader impacts. Support for this joint Egypt-U.S. venture will allow the team to extend and better test the model and to engage two graduate students in an international research experience. The US PIs will work together with the University of Suez Canal to help build Egyptian and international collaboration through two planned workshops to be held in Egypt and hosted by the University of Suez Canal. The work plan will follow methods of Crossey et al., 2006; 2009, to map and sample water and gas from many of the travertine-depositing springs in the Nubian Desert, analyze water chemistry to parse out CO2 sources and analyze gas chemistry (including noble gases) to evaluate percentages of mantle and deep crustal-derived fluids mixing into the groundwater system. This project has intrinsic scientific interest in terms of understanding links between tectonics and endogenic influences on groundwater quality. It has broader impacts in terms of management of groundwater supply, training of junior scientists, and international cooperation.