Questions tagged [geodynamics]
Geodynamics is the application of mathematics, physics, chemistry, geology, and computer science in understanding how mantle convection leads to plate tectonics.
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Is the Theia impact partly responsible for the distribution of mantle plumes?
I was looking at a map of the distribution of mantle plumes, and was wondering if they could be residual material that was either brought here or affected by the Theia impact.
It seems to me that this ...
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Least equatorial ( and tidal) bulge consistent with modest amounts of water in polar regions
In World Building I asked a question about the climate of an hypothetical planet.
There Vogon poet said that
Everyone above 10° latitude will be in permanent drought
Considering that there were no ...
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How deep could an ocean trench be on Earth theoretically? [duplicate]
I was listening to a creepypasta story on YouTube about extremely deep places in the ocean deeper than the Marianas' Trench, and that makes me wonder.
On Earth specifically, how deep could an ocean ...
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How plausible is it that "a portion of the ocean's floor" could suddenly be "thrown up to the surface" as described in this Lovecraft story?
This question came to me after reading H.P. Lovecraft's "Dagon"- the protagonist has fallen asleep drifting on the ocean in a small boat. He wakes up one morning to discover he's been ...
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Slab-breakoff - always connected to continent/continent collision?
The question came to me when pondering the Andes:
Is a slab-breakoff always connected to the transition from subduction of oceanic crust to a continent/continent collision?
Current understanding is ...
user22279
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Are hot springs in non-volcanic areas radioactive?
Hot springs in non-volcanic areas are attributed to the interaction of water with hot rocks deep in the earth's crust:
In non-volcanic areas, the temperature of rocks within the Earth also ...
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Gaps in locations of volcanos (Peru & Chile)
The figure below is taken from Reath, K. et al. (2019)
A couple of things can be seen from this representation
Volcanism seems to be strongly correlated with subduction zones, in this case the Nazca ...
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why continents do not subduct
In section 1.7 of Geodynamics by D. Turcotte & G. Schubet it is stated that
"(...) continental crust cannot be destroyed by subduction"
which I cannot completely understand. So far I ...
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Over what scales can we begin to apply fluid dynamics to accurately model properties of the mantle?
Over what size temporal/spatial scales do geophysicists and geodynamicists begin to apply fluid dynamics to model the mantle rather than elastic/plastic deformation theory?
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How much change has there been to the shape of plate boundaries over geological time?
This is a question that has bothered me for many years. As a new teacher I was asked this question by a 12 year old in our plate tectonics class. I said I would go away and find out. I would really ...
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What equation should I use in this isostasy problem?
I have this problem, and I am not sure where to start. The only Airy equation in my text is $r_1= \frac{h_1 \cdot p_u}{p_s - p_u}$. This doesn't seem to apply, or if it does it isn't obvious. Is ...
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Phase relation for mantle?
I have information about temperature, pressure, normal and shear stresses, viscosity, conductivity, density, heat capacity and adiabatic heating for a particular area of mantle in the form of 2D ...
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Why is the temperature between the earth core and surface not distributed linearly?
So I read somewhere that the inner core temperature of Earth might be as high as 7000 °C.
Depending on the composition of the different layers towards the surface, the temperature should decline ...
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measuring fracture length and width using PKN and KGD models for hydraulic fracturing?
I am trying to understand PKN and KGD models for hydraulic fracturing. I am wondering why equations for fracture width and length does not include 'breakdown pressure' (pressure at which fracture ...
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Determining rotation of a bending detachment fault system
I would like to obtain the angle of rotation (𝛿θ) of a detachment fault (or oceanic core complex) after X meters of rock displaced during spreading at a mid-ocean ridge.
I have a differential ...
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