Nature, Volume 452Sir Norman Lockyer Macmillan Journals Limited, 2008 - Electronic journals |
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Page 311
... peridotites from the ultraslow - spreading Gakkel ridge ( Arctic Ocean ) have very depleted 187Os / 188Os ratios with model ages up to 2 billion years , implying the long - term preservation of refractory domains in the asthenospheric ...
... peridotites from the ultraslow - spreading Gakkel ridge ( Arctic Ocean ) have very depleted 187Os / 188Os ratios with model ages up to 2 billion years , implying the long - term preservation of refractory domains in the asthenospheric ...
Page 312
... peridotites and no basalt have been 85 ° 40 ° 50 ° 60 ° recovered . Dredge haul D70 is recovered in the Eastern Volcanic Zone , which is the easternmost occurrence of peridotite found on Gakkel ridge as yet . sulphides in Gakkel abyssal ...
... peridotites and no basalt have been 85 ° 40 ° 50 ° 60 ° recovered . Dredge haul D70 is recovered in the Eastern Volcanic Zone , which is the easternmost occurrence of peridotite found on Gakkel ridge as yet . sulphides in Gakkel abyssal ...
Page 313
... peridotites are nteractions with metasomatic fluids or melts and seawater conta- nination . The potential for seawater contamination to increase the adiogenic Os isotopes of abyssal peridotites has been debated for ome time23,31,32 ...
... peridotites are nteractions with metasomatic fluids or melts and seawater conta- nination . The potential for seawater contamination to increase the adiogenic Os isotopes of abyssal peridotites has been debated for ome time23,31,32 ...
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