Near-Basement rock-water interaction as an indicator to understand deep aquifer chemistry
- مجال مشروع البحث–الرئيسي
- العلوم البيئية
- مجال مشروع البحث–الثانوي
- العلوم البيئية
- المؤسسة العلمية
- الجامعة الألمانية الأردنية
- المحافظة
- عمان
- قيمة الدعم
- JD9278.36
- سنة الدعم
- 2015
- حالة المشروع
- منتهي مع النشر
- البحث منشور
- (1) Abu-Jaber, N. (2017). Mopping up leaking carbon: A natural analog at Wadi Namaleh, Jordan. Geochemistry, 77(2), 267-279.
(2) Abu-Jaber, N., & El-Naser, H. (2016). Geology and hydrochemistry of the deep sandstone aquifers of Jordan. Environmental Earth Sciences, 75(10), 875.
- ملخص عن مشروع البحث
- 1. Carbon capture and sequestration (CCS) is one of the important options available for partially stemming greenhouse gas emissions from large point sources. The possibility of leaking from deep storage needs to be addressed. The Wadi Namaleh area in southern Jordan provides an interesting case study of how excess CO2 can be trapped in the form of carbonates in the near surface, even when the local geology is not obviously conducive for such a process. Carbonate veins are formed in surface alteration zones of rhyolite host rock in this arid region. The alteration zones are limited to areas where surface soil or colluvium are present. Oxygen, deuterium and carbon isotopes of the carbonates and near-surface ground water in the area suggest that the source of carbon is deep seated CO2, and that the carbonate precipitated in local meteoric water under ambient temperature conditions. Analysis of strontium in the carbonate, fresh rhyolite and altered host shows that the source for calcium is aeolian. Trace elements show that metal and REE mobility are constrained to the alteration zone. Thus, interaction of H2O, CO2 and atmospheric wet and dry deposition lead to the formation of the clayey (montmorillonite) alteration zone. This zone acts to trap seeping CO2 and water, and thus produces conditions of progressively more efficient trapping of carbon dioxide by means of a positive feedback mechanism. Replication of these conditions in other areas will minimize CO2 leakage from man-made CCS sites.
https://www.sciencedirect.com/science/article/pii/S0009281916302331
2. The deep sandstone aquifer complex of Jordan consists of hundreds of meters of Paleozoic to Lower Cretaceous sandstones that extend from the Saudi Arabian border in the south up to northern Jordan. In the south, this aquifer is known as the Disi Aquifer and is near the surface, well understood and heavily exploited. Toward the north, thick accumulations of later Mesozoic and Cenozoic sedimentary sequences cover the complex. The depth of the aquifer in this area makes it less viable as a water resource. Thus, little is known about its origin, movement and chemical evolution. A number of exploration and production wells have penetrated this aquifer throughout central and northern Jordan. The data from these wells can help to draw a reasonable understanding about this aquifer and its water. Most of the aquifer is under artesian pressure, and the piezometric head data point to a general flow north with drainage of the aquifer into the Dead Sea Rift Basin. Stable isotopes show that the water differs from modern meteoric water in the region and thus is possibly Late Pleistocene in age. The water is slightly brackish, and according to Jordanian Standards, it can be used for drinking under certain conditions. Geochemical modeling shows that here is no evidence that the salinity is primarily the result of prolonged water–rock interactions, but more likely the result of mixing with possibly trapped connate water throughout the complex.
https://link.springer.com/article/10.1007/s12665-016-5680-8
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الاسم الكامل للباحث الرئيسي
د.نزار أبو جابر
الجنس
ذكر
المشاريع ذات صلة