AZoCleantech looks at a study showing that only minor variations in the depths of the Tasmanian and Drake gateways are enough to cause a drastic reorganization in Antarctic surface water temperatures and ocean circulation patterns.
Norway
New-york
United-states
Australia
Iceland
Greenland
Argentina
Texas
Antarctica
Panama
London
City-of
Jian Xu; Xiao-Ping Xia; Qiang Wang; Christopher J. Spencer; Bin He .
Abstract:
The mechanisms and processes by which subducted slab interacted with mantle
plume remain controversial, as direct observation of such interaction is
difficult to impossible. Compositional heterogeneity of large igneous
provinces (LIPs) additionally makes plume-slab interaction hard to detect.
Oxygen isotopes are sensitive enough to trace the source of magmas. Here we
provide evidence for plume-slab interaction mainly based on in situ zircon
Hf-O isotope analyses, as well as whole-rock elemental and Sr-Nd-Hf isotope
analyses, on the Late Permian and Early Triassic A-type granites on the
margin of the Emeishan LIP in SW China. These granites show typical A-type
Laji-shan
Qinghai
China
Montana
United-states
Nevada
Wassuk-range
Meng-cheng
Hunan
South-china-sea
Brunei-general
Brunei