| Title | Why Neo-Plutons Are Deeper in Extension Tectonic Fields and Shallower in Contraction Tectonic Fields? |
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| Authors | H. Muraoka, Y. Yano |
| Year | 1998 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | |
| Abstract | Neo-plutonic bodies are often encountered beneath the contraction tectonic geothermal fields in 2-4 boreholes but are rarely reported the extension fields. This leads to a hypothesis that tectonic over-stress in the contraction fields amplifies the upper crustal density and magma buoyancy, so that magma rises to a shallow depth. A difference in the density of diamond drill cores obtained extension and contraction fields demonstratesthis hypothesis |