صورة
A global assessment of deep-sea basalt sites for carbon sequestration
| العنوان: | A global assessment of deep-sea basalt sites for carbon sequestration |
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| المؤلفون: | David Goldberg, Angela L. Slagle |
| المصدر: | Nature Precedings |
| سنة النشر: | 2008 |
| المجموعة: | Nature Precedings |
| مصطلحات موضوعية: | Earth & Environment |
| الوصف: | In recent years, the debate over the most effective means to stabilize greenhouse gas concentrations in the atmosphere has endorsed multiple approaches and a variety of technologies. Assuring secure storage of anthropogenic carbon dioxide is one of our most pressing global scientific challenges that may contribute to achieving a stable solution over the next several decades. Geological sequestration by injection into deep-sea basalt formations provides unique and significant advantages over other potential storage options, including: (a) vast reservoir capacities with high porosity and permeability, sufficient to accommodate centuries-long U.S. production of fossil fuel CO~2~ at locations within a few hundreds of kilometers of populated areas; (b) chemical reactivity of CO~2~ with basalt and in situ fluids to produce stable, non-toxic carbonates; and (c) significant risk reduction for post-injection leakage by geological, gravitational, and mineral trapping mechanisms. We compare independent trapping mechanisms available in deep-sea basalts to those in saline aquifers, which have also been proposed as potential storage environments for anthropogenic carbon dioxide. We suggest that deep-sea basalts offer significant advantages over saline aquifers, in terms of reduced risk of post-injection leakage and storage capacity. Using a global site assessment strategy to highlight the most secure oceanic basalt sites that provide all trapping mechanisms, we initially identify potential target regions that occur in deep-sea basalt and calculate the potential injection volume for each. The largest volumes and most secure basalt sites occur in regions adjacent to intermediate- to fast-spreading seismic ridges as well as deep aseismic ridges. We then use site-specific criteria, such as abundance of ODP and IODP drill sites with basement penetration, permeability and/or porosity data, to refine volume calculations and to prioritize these target regions as promising locations to securely accommodate carbon dioxide injection. ... |
| نوع الوثيقة: | still image |
| اللغة: | unknown |
| العلاقة: | http://precedings.nature.com/documents/2640/version/1Test; oai:nature.com:10.1038/npre.2008.2640.1; http://dx.doi.org/10.1038/npre.2008.2640.1Test |
| DOI: | 10.1038/npre.2008.2640.1 |
| الإتاحة: | https://doi.org/10.1038/npre.2008.2640.1Test http://precedings.nature.com/documents/2640/version/1Test |
| حقوق: | Creative Commons Attribution 3.0 License |
| رقم الانضمام: | edsbas.EFCCDC78 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1038/npre.2008.2640.1 |
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