Hyper Velocity Asteroids and Mantle Plumes

I have a concept of how the pressure release mechanism works.

The energy to transform viscous or immobile mantle material to free flowing magma is quite high.

At 100 kms the asteroid punches through the crust and keeps on going. When the asteroids motion stops completely, it then vaporizes. For a 10 kilometer stony meteorite the total available energy is approximately 1.6 Billion Megatons. At 10,000 Joules per cubic centimeter, with all that energy going to vaporization, It would vaporize a little over one half million cubic kilometers of material.

Mobilizing mantle material does not rely on the energy already present, a huge amount is deposited at great depth. Because the detonation is so deep, it cannot excavate the material above it. The energy is deposited directly into the mantle. The mantle becomes the melt pool and long term storage for the impact energy. The eruptions are catastrophic and long term because of this stored energy.

This also appears to form the three arms of the classic rift by upward pressure and splitting of the crust spaced along lines that are about 120 degrees. Such a structure shows up in Gravitational maps in the Northern Texas area. The plume for such an event might be under New Madrid.

With this much energy available, melting by pressure release would be hard to detect, and irrelevant.
 
As for the probability of collisions this one does not look particularly bad.

http://www.scientificamerican.com/article.cfm?id=star-set-to-collide-with-solar-syst-2010-03

That picture that people have of galaxies being these static pinwheels is naïve. The galactic pot gets stirred a lot. The Solar System does not have a force field. At these velocities finding any remaining original material is very unlikely. Small meteorites would burn up completely or vaporize on impact, so they won’t be found. The interaction time might be only a few hundred years in a million years.

Unless you spot one moving through the Solar System the only other proof would be a change in the 238U/235U ratio. A change in this ratio would indicate mixing with a younger or older source from the asteroid impact. That or an age greater than the Solar Systems age.

Spiking with 235U at geochronology centers removes this potentially troubling evidence. The dual timers of 206Pb/238U and 207Pb/235U are a crosscheck against each other. Someone is nervous enough to invalidate this important crosscheck to cover a host of sins.

Time to get those scientific sinners to repent! Hallelujah
 
4 words:

Stishovite
Coesite
Tektite beds

Got'em?

No?

You know you should have them all around if this hypervelocity impacts were real, right?

So, no need to resort to "big oil" and "mainstream geology" conspiracies. Just dump the whole idea where it belongs.
 
Correa Neto said:
4 words:

Stishovite
Coesite
Tektite beds

Got'em?

No?

You know you should have them all around if this hypervelocity impacts were real, right?

So, no need to resort to "big oil" and "mainstream geology" conspiracies. Just dump the whole idea where it belongs.
Click to expand...

Hole fills in with superheated basalt. No shock minerals survive locally.

Big three armed gravity high is easily visible.

You trust Woods Hole Oceanographic to tell you the truth?

Zero strata studies looking for radioactive layers.
 
DeathDart said:
Hole fills in with superheated basalt. No shock minerals survive locally.

Big three armed gravity high is easily visible.
Click to expand...
Nope. You are wrong.
Check SiO2 stability fields. Coesite is stable in temperatures ~1800oC. Not to mention the shock metamorphism in such an event would be detectable far beyond "the hole". So, again, where are the evidences for the shock metamorphism?

Got the tektite layers that should be associated with these impact events?

All those bits of evidence are kepts hidden from our eyes by "big oil" and "mainstream geologists"?

DeathDart said:
You trust Woods Hole Oceanographic to tell you the truth?
Click to expand...
I trust real science can point the way towards truth.
Real science. Not some babble that looks like it was taken from a SyFy channel catastrophe flick.

DeathDart said:
Zero strata studies looking for radioactive layers.
Click to expand...
Are you sure of that?
Are you sure people would need to look for "radioactive layers"?
Have you ever heard of regional radiometric K/U/Th aerogeophysical surveys?
What makes you think such layers would not been found by such surveys?
 
DeathDart said:
The energy to transform viscous or immobile mantle material to free flowing magma is quite high.
Click to expand...
Well, yeah. Unfortunately for you, there are two sources with sufficient energy to do so in your scenario. First, there's the rock hitting the Earth, which is going to transfer (in your fantasy world) most of its energy into the mantle. Second, there's the mantle itself. The mantle IS HOT--more than hot enough to undergo the necessary phase change.

You acknowledge this yourself, by the way. This is where your basalt would have to come from. The difference is, I actually am taking this to its logical conclusion, while you're going off on a flight of fantasy.
 
Correa Neto said:
4 words:

Stishovite
Coesite
Tektite beds

Sediment Buried Impact Structures In North America

The first structure I found was underneath the town of Meeker Oklahoma. The Center is approximately at 35.557N, -96.871W Which is about 3413N04E using township coordinates.

The impact surface was about 3500 ft underground on the east side of the crater.

Stishovite and Coesite are unavailable. Its estimated age 300 million years, would make surviving tektites unlikely. It is surrounded by a water moat on the North side.

What is visible on the surface is not the actual structure. We are seeing the long term effects of the faulting of the sedimentary rock layers that were lain down above the crater. As the strata were being lain down, they would develop faults as the impact structure beneath them continued to settle. These faults would tend to erode more quickly than adjacent areas, We are just seeing the surface shadow of the real crater, which is still 3500 feet below.

An example of crater bias can be seen in Canada. The glaciers have stripped most of the sediments away to the base rock. Large craters are abundant. In the continental United States most impact craters are like the crater under Meeker, Oklahoma. Buried under a thousand or more feet of sediments. Finding oil in this kind of underground terrain would make you well versed in impact geology and its effect on oil exploration.

How did I find the Meeker crater? I followed the earthquakes. There are a lot of waste injection wells pumping high pressure waste into a 300 million year old impact crater.

Good places to look at the well logs.
West side 3413N03E
East Side 3413N05E

This one ID 1419434 NO API 1613N05E 24902? 1926 has Shale and Boulders from 3238- 3581.

This well ID 14030557 NO API 1613N05E appears to be inside the visible upper radius but the shale debris appears to be resting on base rock 2545-3590.

Another API 0813772 1613N05E Shale 2753-3500.

One on the inside of the crater 3413N03E Shale 3555-4373 R A Roberts 1952.

The northern rim of Meeker Crater exhibits the characteristic wet moat complex of sediment faulting above a buried structure. For locations within the United States the Bureau of Land Management BLM website produces better images than Google.

Easily (sort of) Visible on BLM site, very difficult on Google to get the scope of the crater.
http://www.geocommunicator.gov/blmMap/MapLSIS.jsp
Click to expand...
 
Sabotage Of Woods Hole Sample Collection and Sediment Analysis

Some of the earliest studies with tektites and spherules were related to the analysis of the Uranium and REE Rare Earth Elements in tektites and spherules. These studies ceased by the 1970's.

The big oil company interpretation of geology had the uranium in black shales coming from anoxic precipitation of uranium from seawater. The uranium in the tektites and microspherules was not part of that story, so they went away. Associating the Uranium and REE's to extraterrestrial causes was an association that the big oil companies did not want made. Worked too.

One area in which they didn't want an argument about uranium was in the deep ocean sediments. Yes, they could look for Iridium (thanks to that pesky Alvarez fellow and that oil company traitor Hildebrand) but you sure as hell did not test for uranium. Iridium is refractory and nearly chemically inert. It requires a radiation lab to get a good measurement on Iridium content. The big oil companies are adaptable, so having the very difficult to measure iridium signature, become the gold standard actually played into the big oil companies hands. They had already established a secret monopoly in geochronology, and adding a few radiation labs was not a problem.

For geochronology, you can trust some of the labs in Canada, eh. Dr. Alan R. Hildebrand who helped find the Chicxulub crater works out of a University in Calgary. Not everybody rolled over for the oil companies

The deep ocean sediments are also called pelagic ooze. The sedimentation rate is very slow. The problem for the big oil company's geological fairy tale was the uranium in this muck. Some of the Uranium and REE's found layered in this sediments would indicate mechanical dispersal rather than chemical precipitation. Analysis of each individual uranium horizon could be backtracked to its origin if enough samples were taken. If one sample showed more uranium in a particular horizon it would indicate that the sample was taken closer to the source. So lots of correct data from deep sea sediments could give a good indication for location of an impact.

So was the Chesapeake Crater impact deep enough to create clinopyroxene spherules and then disperse them into the Pacific Ocean? I don't think so. The spherules indicated an impact that went pretty deep, probably into the basement or upper mantle on the North American continent. Impact was very roughly placed at 35 million years give or take about 10 million years. The oil companies had to look into their data base of impact craters and then blamed the Chesapeake Impact structure. The shallow depth of the impact made for a poor chemical match, but the cover story for the Chesapeake Impact Crater was breaking down anyway. So the big oil companies stuck there thumb into their impact crater database, and pulled out the Chesapeake Impact Crater.

If those damn spherules had not been found the Chesapeake Impact Crater could still be secret like the dozens (hundreds?) of other ones on the North American continent. Many of the impact craters the oil companies are hiding are old so there aren't any spherules (Ocean bottoms are subducted after about 200My) to indicate those impacts. So pick the biggest name in deep sea sediments like Woods Hole Oceanographic and buy it out, or sabotage it. This was business, it wasn't personal.

Sabotage of deep sea sediment studies by/or to Woods Hole Oceanographic (Spherules in oceanic sediments) No studies are made about uranium in tektites or spherules from deep ocean sediments. Critical sedimentary core samples are destroyed, or lost, usually during coring operations when the scientists were restricted from the drilling area. How to spot core samples that need to be destroyed? Simple it is called a Geiger Counter.

Woods Hole Oceanographic failure to check sea sediments for basic geological indicators like Uranium is incomprehensible. One good indicator to compare strata on land, is to use known radioactive strata as a reference strata. So the same strata can be followed for hundreds or thousands of miles underground. Why would Woods Hole Oceanographic throw away such a useful tool in correlating deep ocean strata? The very existence of radioactive sedimentary strata in the deep ocean basins was a threat to the oil company fairy tale. So over the side (as with the radioactive cores) went any documented radioactivity measurements.
 
The “classic” three arm Impact Rift?

The “classic” three arm appearance of a rift coincidentally is the surface appearance of a hyper velocity impact into the mantle. The three arm appearance is visible on gravity maps because of the high density basalts that came up through the cracks after the impact. Some of this could have made it to the surface. An example of such a material is found at Pilot Knob Texas. A very heavy mafic material called Nephelinite appearing in the middle of a silicate continent. Move along nothing to see here.

The hyper velocity asteroid impact cycle

Penetration of the Earth's crust with minimal expansion of the asteroid surface area. Visualize a high velocity bullet striking fine china. A hole appears in the china plate but the entire plate does not shatter. At this high of a velocity (100 kms) very little of the energy is going outward from the impact and it reacts for so short a period of time that a significant crater is not generated. Expanding on the significant crater statement; compared to its total energy the surface impact crater is small. Perhaps only a few multiples of the asteroid diameter. So the impact crater from a 10 kilometer asteroid moving at 100 kms might be 50 to 100 kilometers in diameter. If the asteroid expended all of its energy as a surface crater it could exceed 1500 kilometers, as big as any known in the Solar System.

At these energies it is possible that after impact the asteroid shrinks. The material of the asteroid undergoes a change of state to a more compact and dense form of matter that reduces the front surface area of the asteroid. The physics may be more like a particle beam penetrating through a solid . Matter is actually mostly space and at theses energy levels it can be exploited to go much deeper than shockwave models could correctly model. Google a picture of an “explosion of glass beads” as another example of structural changes to allow conservation of energy allowing greater kinetic penetration.

Penetration of the asteroid 100's of kilometers into the mantle, with asteroid slowing rapidly. It drops below a critical velocity level and the front surface begins to rapidly expand.

The asteroid's forward motion stops. The matter of the asteroid and the material below it has been compressed to less than 50% of its normal volume. Detonation occurs releasing millions of megatons of kinetic energy as thermal energy. A significant amount of this energy is lost as a supersonic fountain of vaporized rock mixed with liquid rock is forced back along the asteroids path and into and beyond the atmosphere. Some portions will exit the atmosphere to fall a great distance away from the impact. Spherules in the pacific.

Energy loss mechanisms.
Energy loss occurs for a brief time after impact. Some of the vaporized material follows the incoming path and escapes to the surface. This produces a massive fountain of liquid and vaporized rock. A lot of the vaporized material remains trapped (by the great pressures underground) and transfers its heat to surrounding magma as it is condenses back into liquid rock. The mantle material has had an abrupt increase in temperature. The amount of material that is immediately heated may only be a few hundred thousand cubic kilometers. This heat is transferring from nearly vaporized material to the surrounding cooler mantle material. The molten rock is hot enough to approach the viscosity of water.

A direct consequence of the impact is a huge volume of heated material below the crust. From simple thermal expansion it ruptures the crust above the volume. Apparently the most common fracture pattern of the crust is three fractures at about 120 degrees radiating from a point above the expanded volume.
 
DeathDart said:
...snip...
Stishovite and Coesite are unavailable. Its estimated age 300 million years, would make surviving tektites unlikely.
...snip...
Click to expand...

This tidbit, among others, show you really should do more research on real geology...
Google for spherule beds, Archean, Paleoproterozoic.

You'll find out there are preserved beds wich are one order of magnitude older.

The problem is not related to some cover up by "big oil" and mainstream geologists...
 
Hipparcos

http://www.rssd.esa.int/index.php?project=HIPPARCOS&page=table363
The traverse velocity appears to be the one of relevance.

It lists the 150 fastest stars nearby. 518 to 125 kms. Just the 150 fastest ones, so that doesn' t include the slowpokes.

At 518 kms a 10 kilometer stony meteorite has about 40 BILLION megatons of energy. That is enough energy to vaporize a big chunk of a continent. Because it is so fast, I can't predict the detonation depth. It is possible that it can punch through, if it hits the Earth far enough off center. If it does punch through, whatever is on the exiting side is probably going to achieve Earth's escape velocity. Want to visit the universe, just stand in the right spot and you will.
 
DeathDart said:
Hipparcos

http://www.rssd.esa.int/index.php?project=HIPPARCOS&page=table363
The traverse velocity appears to be the one of relevance.
It lists the 150 fastest stars nearby. 518 to 125 kms. Just the 150 fastest ones, so that doesn' t include the slowpokes.

At 518 kms a 10 kilometer stony meteorite has about 40 BILLION megatons of energy. That is enough energy to vaporize a big chunk of a continent. Because it is so fast, I can't predict the detonation depth. It is possible that it can punch through, if it hits the Earth far enough off center. If it does punch through, whatever is on the exiting side is probably going to achieve Earth's escape velocity. Want to visit the universe, just stand in the right spot and you will.
Click to expand...


Ummm, :notm.

Transverse velocity is that perpendicular to our field of view. Anything travelling that fast "sideways" is extremely unlikely to ever hit us. To be "really dangerous" a star would have to have no apparent motion yet have a large blue-shift to its spectrum. That would indicate it was heading directly at us.
 
Dinwar said:
First I've ever heard of it. And given that I studied the K/Pg extinction event in school, I'd be surprised if it was a serious theory and I'd missed it.
Click to expand...

My own impression is similar.

It was a long OP and people have been healthily debating other parts of it; but that one statement jumped out at me as something I didn't recall ever reading about the Siberian Traps.
 
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Checkmite said:
It was a long OP and people have been healthily debating other parts of it; but that one statement jumped out at me as something I didn't recall ever reading about the Siberian Traps.
Click to expand...
One possible cause of the volcanism that created the Siberian Traps is the Wilkes Land crater. This is an actual hypervelocity impact event rather than the "hypervelocity" in this thread.

So "The Siberian Basalts started with a hyper velocity impact" is a speculation, not a fact.
 
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