Oxygen isotope exchange and flow geometry of meteoric-derived water within an alkali granite pluton: exchange mechanism and advective cooling.
文献类型：期刊论文
| 作者 | Liu, W; Li, XJ; Qin, KZ |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2002-07-01 |
| 卷号 | 18期号:3页码:331-339 |
| 关键词 | mass transport isotope exchange exchange mechanism flow geometry advective cooling |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | One-dimensional transport equations that include the mechanisms of advection, diffusion, hydrodynamic dispersion, and non-equilibrium exchange between water and rock were numerically solved and graphically illustrated. Two lithological groups, the northern marginal facies (NM) and the main body (MB), were distinguished within the Tasigake alkali granite pluton of Ulungur in northern Xinjiang, China. Perthite exhibits extensive exsolution with surrounding albite comb, whereas quartz grains are generally deformed. A volume increase resulting from perthite exsolution has exerted stress on the quartz grains, thus causing their deformation. Arfvedsonite grains are dominantly secondary and have been formed through metasomatism of aegirine-augite. In the delta(18)O-delta(18)O diagrams between quartz, perthite, and arfvedsonite, slopes of data trends were translated to relative exchange rates k(Quartz)/k(Perthite)/k(Arfvedsonite) ( = 1/5. 3/5. 0) that indicate surface-reaction as the oxygen isotope exchange mechanism. This, coupled with the microtextural characteristics, suggests that isotope exchange depends on mineral reactions. Application of the model of coupled mass transport and kinetically limited isotope exchange to the Tasigake pluton, established infiltration geometry of meteoric-derived water from the NM through the MB. The steep data trends and the low degrees of O-18-depletion of quartz and perthite from the NM are interpreted as resulting from interaction with an isotopically unevolved meteoric-derived water during a relatively short time-duration. However, interaction with an isotopically more evolved longer-path-length meteoric-derived water during a longer time-duration resulted in the gentle data trends and the higher degrees of O-18-depletion of quartz and perthite from the MB. This study shows that advective heat removal by circulating surface waters can be an important mechanism for cooling a granite pluton. |
| WOS关键词 | CORE COMPLEXES ; FLUID-FLOW ; DIFFUSION ; FELDSPAR ; SYSTEMS ; TRANSPORT ; EVOLUTION ; MINERALS ; ROCKS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000177516200007 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77595]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu, W |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, W,Li, XJ,Qin, KZ. Oxygen isotope exchange and flow geometry of meteoric-derived water within an alkali granite pluton: exchange mechanism and advective cooling.[J]. ACTA PETROLOGICA SINICA,2002,18(3):331-339. |
| APA | Liu, W,Li, XJ,&Qin, KZ.(2002).Oxygen isotope exchange and flow geometry of meteoric-derived water within an alkali granite pluton: exchange mechanism and advective cooling..ACTA PETROLOGICA SINICA,18(3),331-339. |
| MLA | Liu, W,et al."Oxygen isotope exchange and flow geometry of meteoric-derived water within an alkali granite pluton: exchange mechanism and advective cooling.".ACTA PETROLOGICA SINICA 18.3(2002):331-339. |
入库方式： OAI收割
来源：地质与地球物理研究所
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