Lead and helium isotope evidence from oceanic basalts for a common deep source of mantle plumes

被引：395
|
作者：
Hanan, BB [1 ]
Graham, DW [1 ]
机构：
[1] OREGON STATE UNIV,COLL OCEAN & ATMOSPHER SCI,CORVALLIS,OR 97331
来源：
SCIENCE | 1996年 / 272卷 / 5264期
关键词：
D O I：
10.1126/science.272.5264.991
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Linear arrays in lead isotope space for mid-ocean ridge basalts (MORBs) converge on a single end-member component that has intermediate lead, strontium, and neodymium isotope ratios compared with the total database for oceanic island basalts (OIBs) and MORBs. The MORE data are consistent With the presence of a common mantle source region for OIBs that is sampled by mantle plumes. He-3/He-4 ratios for MORBs show both positive and negative correlation with the Pb-206/Pb-204 ratios, depending on the MORE suite. These data suggest that the common mantle source is located in the transition zone region. This region contains recycled, oceanic crustal protoliths that incorporated some continental lead before their subduction during the past 300 to 2000 million years.
引用
收藏
页码：991 / 995
页数：5
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