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Motions
of Earth's Tectonic Plates
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Cosmos & Planets | Climate | Earth's Wobble | Earthquakes | Humanity | Solar Activity | Tectonics | Volcanism |
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This panel is intended to define the primary mass flows and motions in the crust of the Earth which fracture the outer crystallized shell of the Earth and induce great blocks and regions of the crust (so-called tectonic plates) to drift apart (expansion rifting) or merge together (subduction collision). THIS FRAG STARTS WELL BUT WANDERS INTO VERY ROUGH DRAFT AND DOES NOT CONCLUDE
As with the general Earthquake Gallery Index, you can click on any of the iconic graphs or pix below to expand it up to its full size. Some are so large horizontally that the browser will shrink them to fit in one view window. This will result in an unreadable graph. Simply click on the shrunken graph or map to tell the browser to expand it back to full size. All compressed images in the Earthquake Gallery work the same way. The images which give you only blurry lines are graphs which are very wide on the horizontal scale to provide monthly or daily details. The titles in the text block to the right of the compressed graphs are linked to a section in a web page which explains the graph and offers observations and analysis of what you are seeing. Most of the Earthquake Gallery unfolds this way. You can quickly browse through the miniatures to find items which you want to read about.
THIS FRAG STARTS WELL BUT WANDERS INTO VERY ROUGH DRAFT AND DOES NOT CONCLUDE The quake zones are the manifestation of the movement of the tectonic plates. As they move, they produce stress and waves of compression which deform the crust with folding, uplifting and downwarping. Sometimes the stress and "shape-shifting" waves producing massive faulting, sudden cracking of the rock, and the grinding slippage of one immense slab against another which produce the telltale shaking of an earthquake. These are easy to detect, especially if they are about 4.0 in magnitude or greater. The seismic signal of the 4+ quakes can generally be detected at widely scattered remote locations, allowing humanity to create profiles about the seismic activity in all corners of the Earth. The seismic profiles have given us the ability to define with remarkable precision where the Earth is moving. Even though the seismic profiles for the Earth are still incomplete and immature (they need another 100 years of "aging" to get really good, most of the major activity zones are easy to define and these are profiled extensively in databases, graphs, and on various kinds of maps. See Quakes Zones for how to connect with this information. Knowing where the Earth's crust is moving, scientists are able to deduce from many types of evidence how the plates are moving and by how much. Generally they are either slipping past each other in what is called a transform fault, or away from each other from what is an expansionary rift of the crusts, or they are colliding, sometimes head-on and sometimes obliquely at some angle. Where they collide of course the plates crumple into mountain ranges, subduct one edge under the other, and ultimately the edge of one slab is pushed deeply enough to return into a liquefied state known as magma. The crust also moves more slowly without causing sudden movements in the crust. One can think of this movement as "shape-shifting" waves which deform the crust to produce more and more gradual uplifting and downwarping. These motions are difficult to detect because they are so slow that our nervous systems and our typical monitoring devices can't read them. There is no seismic signal which is transmitted through the rock, thus we know very little about how this activity arises and is transmitted. Accordingly, there is not a single database anywhere which records such information. The key question which three-dimensional plate tectonics has not answered is why the plates move. The where, when, and even how much is broadly well defined, at least for the past 30 years or so. But the why is largely a mystery. Some speculations have been proferred, but these speculations don't explain very much and it is doubtful they explain anything. Without this understanding, there is NO true Earth science, only a hodge-podge of well-meaning but often mistaken endeavors, such as the Carbon Dioxide Red Herring. The three primary theories which now float through the scientific literature and the iway, are "slab-pull, hot rising plumes, and literal expansion of the Earth. Literal expansion of the Earth (growing in size) has no scientific following because it is about as workable as the flat-earth society or the hollow-earth theory. Slab-pull (the edge of the slab sinks because it is cooler and thus heavier) simply contradicts so much elementary common sense it is immensely difficult to visualize how it could work. Hot rising plumes suffer equally from a lack of common sense. The theory holds that a rising current of magma hits the bottom of a tectonic plate and is deflected to flow horizontally. The friction of this flow pulls the plate with sufficient force to shove a portion like India under Eurasia to produce the Himalayas. But I would suppose that a plume of such energy and speed to shove so much mass around would have melted away a dripping plate of India from the bottomside long before the Himalayas could be borne. And even if they had such power, wouldn't random rising plumes cancel out each other's influence and leave the plates deadlocked in a vast "beaver dam"? I mean, if you are going to have one rising plume, why not 50 of them randomly spaced rising off the core? Have you ever looked at a pot of boiling water? Go hit the kitchen and describe what you see. Wouldn't the rising plumes hit in so many places that they would cross vector each other to produce no net movement of the tectonic plates they hit? Thus Vortex Tectonics. The plates are irrelevant per se, just simply accidental fragments, a sort of "pond scum" of frothy light elements floating on the surface. It is ALL the flow of mass in the a vast vortex. The three-dimensional perspective of traditional plate tectonics is transformed into a four dimensional frame of consciousness which connects the moving, orbiting, spinning Earth with what is actually moving it: its orbital motion in the cosmic frame created by the Sun, the Moon, and the Solar System. All the motions of the parts are directly derived from these vaster cosmic motions. Through this perspective we can look at the Major Quake Zones and actually make sense out of WHY the plates are moving the ways they are moving. We can compare their activities and see that almost all of their motions fit within the limited range of potentials which the cosmic frame make possible. None of the major motions of the major plates contradicts what the cosmic frame mandates. Or, in other words, the orbital cycles, moving the mass of the solar system in certain, regular, great, and very ponderous ways, MUST induce motion in the parts in certain well defined ways. These induced motions can be described a priori in a rigorous manner. They can be searched for empirically. And they can be found in the facts on the ground. Voila! The Vortex rules. Background Information & Knowledge/Data Sources:
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The Motions Of The Tectonic PlatesA Brief Sketch
The primary motions in the Earth's crust are
With these dynamics clearly in mind, in principal, the motions of the tectonic plates should be very simple for us to determine. After all, we know where they are going, into the compression zones where the edge of one vast block of the crust slowly sinks (or subducts) under the edge of another vast block of crust. And we know where they are coming from, they are slowly "flowing" from the expansion rifts. Technically, it is merely a question of connecting the dots. Accordingly, we draw the dots on maps and bingo, it should all be clear. Alas, there are many sublime difficulties in this simple task. Today's dots, when connected ignorantly with yesterday's dots, will lead us into complete confusion. Or, we have some stale old dots which we should not attempt to connect to the fresh "new ones" of this age. One of the issues is that the crust of the Earth is very old and it obviously bears the scars of previous ages which may have been and probably were responding to radically different force vectors at work in the crust. These scars of the ancient past may provide "false leads" to "dead ends". Plate subductions and rift expansions doubtless had a completely different dynamic 150 million years ago. Yet that ancient time has left major zones in the topography of the Earth which might easily mislead us away from seeing what is actually happening in today's Earth. Another major issue is that we have only half a basket of dots. The great and wonderful charts which show the Expanding Rifts and the Sliding Transform Faults along with the Ages of the ocean bottom (see below), tell us much but they may also cause us to leap too rapidly to overdrawn conclusions. The maps convey a great picture but the picture in the map is a mathematical fantasy made of up of statistical samples. As we should all know, "blind" statistical generalizations often lead to bad inferences and silly conclusions. A profoundly important question also quickly arises when one attempts to visualize just how blocks of the crust are moving relative to other blocks. Is the tectonic plate being thrust over the ocean plate or is the ocean plate being thrust under the tectonic plate. Or, as a few geophysicists have been asking since the 1990's (slab pull), is the ocean plate sinking under the continental plate because its relative coldness and denser material makes it heavier, thus the slab "pulls" itself under the continental plate? These issues are not easy to sort out, in fact they may be unsortable within the science of this generation, but they are not even the worst problem. The greatest difficulty is the lack of understanding the motive force of plate motion. Within the prevailing literature circa 2007, the "structure" of the motive force with energizes and arranges the directions of movement in the great crustal blocks is not understood on a planetary level. Two theories, "slab pull" or "hot rising plumes" have been discussed inclusively. Neither concept can explain much of anything, both are nearly impossible to research, neither can be proven, and accordingly, neither is being seriously modeled. Against this backdrop, the elementary ideas of vortex tectonic have a lot to offer. How and why the energy arises from the cosmic framework is elementary and easy to understand. The consequences which must be manifest are easy to predict and their actual evidence is easy to recognize. In other words, we can easily spot the "vortex dots" and connect them elegantly . Let us begin with a clear idea of how the crust of the Earth MUST MOVE within the gravity vortex which is Earth. The Earth is rigorously layered into mass layers by gravity, the heaviest elements in the center, the lightest on the outer crust. The lighter elements are generally readily dissolved or carried in suspension in water, hence most of the visible outer surface of the Earth is the story of the flow of water and its distribution of the elements which make up the various minerals. Science has gotten very very good at learning how to tell this part of the story of the Earth. Well over a billion years of this story are still discernible here and there. This story is generally told with a "static" frame. Geologists and geophysicists have gotten very comfortable in working in a three or four dimensional frame which is disconnected from the cosmic framework. This is the current stumbling block in Earth Science. Let us remove the stumbling block. The Earth is ceaselessly spinning and rotation a body which is itself spinning and rotating around at least two other primaries, both the galaxy, and a "local system" within the galaxy. These are also rotating and orbiting through the immensely huge and essentially unknown, and perhaps infinitely unknowable universe. In other words, as the ancients said, all is in motion, all the energetics of the tectonics of the Earth flow directly from this motion, all is in ceaseless change through this motion, hence the structure of the crust and surface of the Earth is shaped directly as a consequence of this motion. This motion is best understood as a vortex. A vortex is essentially a four dimensional entity. It is a three dimensional flow of matter which moves in time (the fourth dimension) in a spiraling (recycling) structure induced and sustained by a "field" of force vectors. In Earth terms, the Earth spins from west to east daily and rotates around the Sun once a year. If that was all there was to the Earth vortex, there likely would be very little Earth history story. Gravity would compact and uniformly layer all the elements according to weight. A shallow sea would cover the entire surface. Other than a mild seasonal variation on the top layer of water, plus some other long term mild variations caused by changes in the gravity vector and energy output of the Sun in long cycles, the Earth would not change much in a billion years. There would probably still be some "creep" in the mass of the Earth. It would tend to creep in broad horizonal bands from west to east (following the direction of spin. Since the crustal mass on the equater or in the tropic zone directly under the sun at dawn would offer the greatest amount of new attraction mass, more of it would move than at the polar zones. Since the spin speed is the most rapid at the equator, more would move further faster in this zone. The creep rate would vary by lattitude, the greatest at the equator, the lowest at the poles. These latitude oriented bands would creep slowly around the Earth at a very very slow retrograde ratio to the daily spin. This creep might be so slow as to be almost immeasurable within the span of a million years. That would be the fate of the Earth if it were an isolated planet. What makes the story far more interesting and very complex is that the Earth is a binary planet. the Earth's vortex is structured not just by the mutual gravity of the Sun and the mass of the Earth. It is also structured by the Moon. The Moon's gravity vectors on the Earth constantly are adding to or substracting from the gravity vectors of the Sun. This occurs on a daily basis, a nearly monthly basis, on a nearly annual basis, and in other cycles, most especially the 18.5 year Saros cycle (cycle of the eclipses) and its various "beat frequencies" which extend for as long as a thousand years (and slightly longer). The Sun and Moon together rule the surface of the Earth. All surface structures have been directly induced by pulling power of the Moon working alternatively with the Sun or opposing the Sun. As the Earth spins, any given point on the crust spins from west to east. When the spot is underneath the Moon or the Sun, the gravity vectors will pick the spot up and then eventually drop it after it has disappeared over the horizon.
The greatest stress and relative motion in the gyre of the Earth underneath the Sun and the Moon must be in the equator directly underneath them where the mass in spinning the most rapidly. Thus the tropical zone must be cracked and riven the most.
The Moon will tend to retard and thus pull the closest and greatest amount of mass towards the west.
The Moon will pull the closest mass in the south towards the equator (plates should flow in a northerly direction).
The Moon will pull the closest mass in the north towards the equator (plates should flow in a southerly direction).
The latitude bands of gyre creep (transform slip faults) will show the greatest relative motion in and near the tropics, generally showing an eastward motion, and the least amount of creep in the polar zones. This gyre creep is primarily the result of the centrifugal force in the spinning mass of the Earth. This force acts differentially on each degree of latitude, the greatest force at the Equator, the least amount of force near the poles of the Spin Axis.
The polar zones will creep around from east to west in independent gyres.
As can be seen by careful examination of Bird's map, solar and lunar field influence on the mass gyre of the Earth explain a great deal of the rifting, faulting and relative motion of the continents. Not all of it, but a very great amount of it. We can finish the job by looking at the structure of the Great Rift and the relative motion away from the Expansion zones into the subduction zones. Our best beginning may be with the map by R. Dietmar Muller et al (Muller, School of Geosciences, University of Sydney, Australia) which has been magnificantly published by NOAA's National Geophysical Data Center. The map published by Muller et al is actually a complex set of databases of many kinds of phenomenon painstakenly created over many decades by many different scientists. The databases describe a great many different kinds of points and tangents, we merely see the composite result in one dimension, the age profile of the bottom of the Earth. The map plots the age of the ocean bottom as it spreads away from the Expansion Rift. What a brilliant stunning accomplishment! It probably tells us so much more than we can imagine at the current time. Here in the Earth Changes Gallery it is used to compare the relative quake activity and draw conclusions about which plates are the prime movers. The Expansion Rifts & Age Of The Ocean Plates Click On This For Very
Large Poster Version
Image Source: U.S. NOAA
Geophysical Data Center:
The NOAA maps are complemented by a
Data and Analysis Note in the Journal of Geophysical Research (1997)
entitled "Digital Isochrons of the World's Ocean Floor" by Muller et
al.
DIGITAL ISOCHRONS OF THE WORLD'S OCEAN FLOOR Globe versions from the work of Muller et al. slide set of the turning globe http://www.ngdc.noaa.gov/mgg/fliers/00mgg04.html http://www.ngdc.noaa.gov/mgg/image/turninglobe.gif Topographic Map Of Ocean Floor Click On This For Large Version
Image Source:
U.S. NOAA Geophysical Data Center: a as a fragment of the North American Plate ~ Motions of the Plates Continues... We began the discussion in this panel lamenting the problem of understanding the relative motion between the various plates. As can be seen above in the definition of the various zones, we have four major spreading zones in the Earth, three of them are mainly north-south axis of spread and one is an west-east axis of spread. These set up the dynamics which are thrusting the plates in their various migrations. Understanding the rates and directions of migration from these spreading zones is the fundamental requirement for any Earth science about the dynamics of tectonic plates. Unfortunately this information is not be any means complete nor is it based on a serious data series of on-going measurements. This leaves all reasoning based upon such phenomenon fairly vague and weak. Compounding this problem is that completely missing in the annals of peer-reviewed science is any coherent theory of what animates the motions. Why does the Earth expand in these zones? The existing theories are not widely understood, supported, nor are they even physically possible, let alone testable. Nor do they provide us with a logic for the actual tectonic structure of the expansions and contractions in the crust. Like Crazy Aunts nattering in the attic, they offer nothing but headaches induced by too much obscure Latinized Greek polysyllabic bullsnargle which insecure academics like to pass off as "science". Hot spots, cold spots, slab pulls, convection currents, you name it, Crazy Aunts nattering endlessly in the Attic. All completely imaginary conjectures. Let's begin with a real principle. The vortex principle suggests that the crustal mass should tend to flow from west to east in the same direction as the Earth's spin and rotation around the Sun. It would be quite strange if it does not. JPL satellite measurements suggest in the main (there are some contrary readings) that indeed the Antarctic circles around and around from west to east in the same direction as the spin of the Earth. If so, it would have very little north-south tectonic drift unless perturbed by interference from another plate, which might be the case with the tip of Latin America. The crust of the Earth is breaking up into the smallest fragments on or near the Equator. This proves what we already can infer from elementary physics, namely that the most mass spin energy is expressed in the equator, the Earth breaks at the Equator more than at any other latitude. This must be a major factor in the entire dynamic. Near the equator, there are two primary nodes of expansion fracture which are very close to 180 degrees separation: two Indian Ocean Rift Triple Junctions hugging tightly on Longitude East 70 and two East Pacific Rift Triple Junctions located between Longitudes West 110 and 100, that's a separation of 180 to 170 degrees, opposite sides of the world. These expansion rift areas are considered to be the most active in the world today. Offset from both of these two expansion rifts by about 25-30 degrees of Longitude TOWARDS THE EAST, we find the two most active north-south compression zones in the world. To the east of the East Pacific Rise, we find one of the longest compression zones in the world, running from the Andes chain though the Carib Plate to terminate at the often active Colima and Popo volcanoes. To the east of the Indian Ocean Rift we find the the Sumatra Trench which is a major subduction zone of the Australian-Indian Plates against Eurasia and the Philippine (of Western Pacific) Plate Frags. The largest quakes in the world from December 2004 to 2007 have been found on these zones, including two 9+ quakes off Sumatra and one 8+ quake in Peru. Clearly the greatest tension in the crust is in those north-south zones. This is exactly what MUST BE if the vortexian principles of Lunar-Solar induction of tectonic creep is real. Now the interesting question is, what is moving against what. Without foreknowledge, using the simplest logic, one might suppose that the Pacific Plate Frags (Nazca, Cocos, Rivera) are separating from the East Pacific Rise and are moving the most rapidly against South America, the Carib, and North America. One would suppose as well that the Indian or Australian Plates are seperating rapidly from the Indian Ocean Rift and colliding with Sumatra, which is really part of Southeastern Eurasia. In othere words, these ocean plates moving towards the East. But they are also moving from the South aggressively expanding out of Antartica. said to be moving mainly to the North. South America said to be moving towards the West. North America to the west, riding up over a northward trending ocean bottom. Where does it get the thrust? Most likely, from the same vortex principals, the overall net drift of the greatest portion of crustal mass is also from west to east. This may be best seen from the perspective of the Atlantic Great Rift. The Northern So does the greater portion of Eurasia above the collission belt of the Causcasis, Himalayas
Western Europe moving the the NE in same dirction as Arfica and Australian Plate. and Indian plates
But Asia is moving to the Southeast, head on against Pacific Plate and Philippine Plate, which are moving to the
Geodesy comment: this is a very short term database. It is roughly consistent with a lot of Plate Tectonics
estimates but is not the only game in town and probably is not the final answer on long term trends and movements Additionally, for intance, North America has more of a westerly motion and even somewhat of a souhthwestern motion
in the higher parts of the Rocky Mountain cordillera running to the Yukan and thence to the West.
New Madrid, St. Lawrence, and the Colorado/Yellowstone zones may be and probably are important pivot zones of
relative motion. The Cook Inlet zone is another profoundly important pivot point Hence, wiser to see North America
in greater detail.
Scientists have composed a digital movie of the Puerto Rican Trench, which is the deepest zone in the Atlantic, some 8000+ meters at its deepest.. This is most likely the subduction zone on which Edgar Cayce's Atlantis floundered and sank as its leading western edge subducted under the Carib Plate. A great article on the sunken beaches and lagoons found on the sides of this "trench" is reviewed in the Return of the Phoenix. Go take a look in a simulated "dive" through the Puerto Rico Trench on the Northeastern Edge of the Carib Plate. The movie is short and worth a quick peek. As you view it, the left side is the Carib Plate, the right side may be part of the sunken island empire of Atlantis.
http://www.ngdc.noaa.gov/mgg/image/puerto_rico_trench.html Both plates are currently moving towards the left (which is be crudely close to west by northwest). The plate on the right side is moving more rapidly than the left. Bird et al indicate approximately, C = 10, Atlantic = 25 Visualize the right side thus being forced to plow under the left side. Slowly it does, crumpling and lifting up the left edge. Puerto Rico is the result. Can you visualize those high peaks on the Atlantic side plunging under the Carib Size? Gradually they do. Ocean Sediments - Another Clue To The Mystery Of Tectonic Motion Click On This For Large Version
Image Source: U.S. NOAA
Geophysical Data Center:
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