DOI: 10.1002/2016GL068332
论文题名: Lithospheric thickness controlled compositional variations in potassic basalts of Northeast China by melt-rock interactions
作者: Liu J.-Q. ; Chen L.-H. ; Zeng G. ; Wang X.-J. ; Zhong Y. ; Yu X.
刊名: Geophysical Research Letters
ISSN: 0094-9214
EISSN: 1944-8945
出版年: 2016
卷: 43, 期: 6 起始页码: 2582
结束页码: 2589
语种: 英语
英文关键词: lithospheric mantle
; melt-rock interactions
; potassic basalts
Scopus关键词: Lead
; Mica
; Neodymium
; Rocks
; Rubidium
; Strontium
; Cenozoic potassic basalts
; Compositional variation
; Good correlations
; Incompatible element
; Lithospheric mantle
; Lithospheric thickness
; Rock interaction
; Sr-nd-pb isotopes
; Basalt
; basalt
; Cenozoic
; correlation
; crustal thickness
; isotopic composition
; lithosphere
; magma
; mantle
; melt inclusion
; phlogopite
; potassic rock
; China
英文摘要: Melt-rock interaction is a common mantle process; however, it remains unclear how this process affects the composition of potassic basalt. Here we present a case study to highlight the link between compositional variations in the potassic basalts and melt-rock interaction in cold lithosphere. Cenozoic potassic basalts in Northeast China are strongly enriched in incompatible elements and show EM1-type Sr-Nd-Pb isotopes, suggesting an enriched mantle source. These rocks show good correlations between 87Sr/86Sr and K2O/Na2O and Rb/Nb. Notably, these ratios decrease with increasing lithospheric thickness, which may reflect melt-lithosphere interaction. Phlogopite precipitated when potassic melts passed through the lithospheric mantle, and K and Rb contents of the residual melts decreased over time. The thicker the lithosphere, the greater the loss of K and Rb from the magma. Therefore, the compositions of potassic basalts were controlled by both their enriched sources and reactions with lithospheric mantle. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979470064&doi=10.1002%2f2016GL068332&partnerID=40&md5=5a3ade6ce180d06bc9cbd70c8b18c061
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10177
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, China
Recommended Citation:
Liu J.-Q.,Chen L.-H.,Zeng G.,et al. Lithospheric thickness controlled compositional variations in potassic basalts of Northeast China by melt-rock interactions[J]. Geophysical Research Letters,2016-01-01,43(6).