| Yu Zenghui,Zhai Shikui,Li Xianzhong. 2001. Glass inclusions in volcanic rocks in the Okinawa Trough back-arc basin:constraints on magma genesis and evolution. Acta Oceanologica Sinica, (3):383－390 |
| Glass inclusions in volcanic rocks in the Okinawa Trough back-arc basin:constraints on magma genesis and evolution |
| Glass inclusions in volcanic rocks in the Okinawa Trough back-arc basin:constraints on magma genesis and evolution |
| Received:June 24, 2000 Revised:April 02, 2001 |
| DOI： |
| Key words:Glass inclusion magma genesis and evolution Okinawa Trough |
| 中文关键词: Glass inclusion magma genesis and evolution Okinawa Trough |
| 基金项目:The study was supported by the National Natural Science Foundation of China under contract Nos 49625609 and 49673194. |
|
| Hits: 867 |
| Download times: 615 |
| Abstract: |
| The major elemnt compositions of glass inclusions in plagioclase and pyroxene phenocrysts of basalt and pumice in the Okinawa Trough back-arc basin are determined by electron microprobe.The results indicate that basalt and pumice are cognate and respectively represent the proluots at early stages of mgmtism and at late stage of crystal fractionation.The initial magrma in the trough is rich in H2O.The variation of H2O content in magma may play an important role in the magma evolution.Plagioclase is the mineral crystallized throughout the whole magrmatic process and accumulates in the zoned magma chamber.From these features it can he inferred that the initial magma in the Okinawa Trough,whose opening began in recent years,is serious ly affected by fluid or other materials carried by subducting slab and the geocbemical feature of volcanic rocks is in some degree similar to that of lavas in island-arc environments. |
| 中文摘要: |
| The major elemnt compositions of glass inclusions in plagioclase and pyroxene phenocrysts of basalt and pumice in the Okinawa Trough back-arc basin are determined by electron microprobe.The results indicate that basalt and pumice are cognate and respectively represent the proluots at early stages of mgmtism and at late stage of crystal fractionation.The initial magrma in the trough is rich in H2O.The variation of H2O content in magma may play an important role in the magma evolution.Plagioclase is the mineral crystallized throughout the whole magrmatic process and accumulates in the zoned magma chamber.From these features it can he inferred that the initial magma in the Okinawa Trough,whose opening began in recent years,is serious ly affected by fluid or other materials carried by subducting slab and the geocbemical feature of volcanic rocks is in some degree similar to that of lavas in island-arc environments. |
|
HTML
View Full Text
View/Add Comment Download reader |
| Close |
