2003 Fiscal Year Final Research Report Summary
Mecahnism and environment for deposition of silica sinter, in geothermal areas of SE Asia
| Project/Area Number |
14404015
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
資源開発工学
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| Research Institution | Tohoku University |
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Principal Investigator |
BIGNALL Gregory Tohoku University, Graduate School of Engineering, Assistant Professor, 大学院・工学研究科, 助手 (70333854)
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| Co-Investigator(Kenkyū-buntansha) |
HIRANO Nobuo Tohoku University, Graduate School of Environmental Studies], Assistant Professor, 大学院・環境科学研究科, 助手 (80344688)
TSUCHIYA Noriyoshi Tohoku University, Graduate School of Environmental Studies, Professor, 大学院・環境科学研究科, 教授 (40207410)
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| Project Period (FY) |
2002 – 2003
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| Keywords | silica sinter / quartz vain / fluid inclusion / water-rock interaction / SEM-CL / Shargaljuut geothermal field / Shuteen complex |
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| Research Abstract |
A range of multidisciplinary laboratory and field-based studies have been undertaken over the last 12 months related to the project "Mechanism and environment for deposition of silica sinter, in geothermal areas of SE Asia ". Our work has lead to the publication of several articles (and others "accepted" or "submitted" to international journals) and oral presentations at several international / domestic meetings. The grant funding has also been invaluable in supporting the related and collaborative research of several students, which have been supervised by the principal researchers in this wider research programme, and the understanding of fluid-rock interaction processes in active geothermal systems of SE-Asia (and elsewhere)The work has considered the character and processes related to silica precipitation and hydrothermal alteration in the active geothermal setting (i.e. the nature of silica precipitation processes in the modem setting -in the subaerial setting associated with active thermal manifestations and subsurface) focusing on the Shargaljuut Hot Springs in Central Mongolia, the Te Kopia geothermal area (and to a lesser extent at the Waiotapu thermal area) in New Zealand. To consider the nature of silica (quartz) precipitation processes in ancient geothermal systems we focused our attention on the (porphyry-Cu mineralized) Shuteen Complex (Mongolia) and associated high-temperature hydrothermal (epi/mesothermal) quartz vein system on the periphery of the main alteration zone. In addition to field-based studies, we undertook a range of laboratory-based experiments (related to the development of SEM-CL imaging, and interpretation of textural features revealed by this new technique), but also geochemical analysis of water samples from the active geothermal systems, microscopy and fluid inclusion analysis (as appropriate to our ongoing work).
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