Meteorites
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There are three basic types of meteorites: stony, iron, and stony-iron. Stony meteorites are the most common type, making up 90% of meteorite falls. The value of a meteorite depends on its chemical composition and abundance - rare meteorites from Mars or the Moon can be worth $2,500-$3,000 per gram. Meteorite hunters search known strewn fields using metal detectors and magnets to locate scattered fragments, sometimes following eyewitness accounts of meteorite falls.
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1) There are three main types of meteorites: iron, stone, and stony-iron. Iron meteorites contain over 90% iron and nickel and have a distinctive crystalline pattern.
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Cumulate deposits: fractional crystallization processes can concentrate metals (Cr, Fe, PGE, Pt, Ni, Ti, Diamond ))
Pegmatites : late staged crystallization forms pegmatites and many residual elements are concentrated (Li, Ce, Be, Sn, U, Rare Earths (REE), Feldspar, Mica, Gems).
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This document discusses various mechanisms that can cause variation in igneous rocks, including magmatic differentiation, assimilation, and magma mixing. It defines primary and parental magmas and explains that over 700 types of igneous rocks exist despite only a few primary magma types. The key mechanisms of magmatic differentiation discussed are fractional crystallization, liquid immiscibility, vapor transport, and thermal diffusion. Assimilation and magma mixing are also explained as additional processes that can change a magma's composition and result in diverse rock types. Specific examples like carbonatites and unusual rock compositions provide evidence of these differentiation and mixing processes.
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A fabric describes the spatial and geometric relationships that make up a rock at the microscopic to centimeter scale. It includes planar structures like bedding and cleavage, as well as the preferred orientation of minerals. Fabrics can be primary, forming during rock formation processes, or secondary and resulting from deformation. Foliation refers specifically to planar fabric and can develop through processes like cleavage, schistosity, and mylonitic foliation under increasing metamorphic conditions and deformation. Lineations describe linear fabric elements oriented in rocks, such as intersection lineations between planar features or mineral lineations showing preferred mineral alignments. Together, foliations and lineations define the tectonite class of a rock.
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Geochemistry and mineralogy of the campanian sandstone of
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British Organic Geochemistry Meeting 2012, Leeds University, Oral Presentation
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Planets powerpoint part 1- no sound
The document provides a brief overview of each planet in our solar system, starting with the Sun at the center and moving outward to Neptune. It notes key facts about each planet such as Mercury having craters, Venus being similar in size and structure to Earth but without water or life, Earth supporting water and life, Mars being very cold with ice, Jupiter having a Great Red Spot and 50 moons, Saturn being a gas giant, Uranus having a methane atmosphere, and Neptune being the farthest planet from the Sun.
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Search for life in our (1) solar system and (2) Milky Way Galaxy
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Dana Backman
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Origin of the Solar System and Extrasolar Planets
*
The solar system is our home in the universe. As humans are an intelligent species, we have the right and the responsibility to wonder what we are. Our kind has inhabited this solar system for at least a million years. However, only within the last hundred years have we begun to understand what a solar system is.
*
You are linked through a great chain of origins that leads backward through time to the first instant when the universe began 13.7 billion years ago.The gradual discovery of the links in that chain is one of the most exciting adventures of the human intellect.
The Great Chain of Origins
*
Earlier, you have studied some of that story:Origin of the universe in the big bangFormation of galaxiesOrigin of starsProduction of the chemical elementsHere, you will explore further and consider the origin of planets.
The Great Chain of Origins
*
By the time the universe was three minutes old, the protons, neutrons, and electrons in your body had come into existence. You are made of very old matter.
The History of the Atoms in Your Body
*
Although those particles formed quickly, they were not linked together to form the atoms that are common today.Most of the matter was hydrogen and about
25 percent was helium. Very few of the heavier atoms were made in
the big bang.
The History of the Atoms in Your Body
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Although your body does not contain helium, it does contain many of those ancient hydrogen atoms that have remained unchanged since the universe began.
The History of the Atoms in Your Body
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During the first few hundred million years after the big bang, matter collected to form galaxies containing billions of stars. You have learned how nuclear reactions inside stars combine low-mass atoms, such as hydrogen, to make heavier atoms.
The History of the Atoms in Your Body
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Generation of stars cooked the original particles, fusing them into atoms such as carbon, nitrogen, and oxygen. Those are common atoms in your body.Even the calcium atoms in your bones were assembled inside stars.
The History of the Atoms in Your Body
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Most of the iron in your body was produced by:Carbon fusion in type Ia supernovae Decay of radioactive atoms in the expanding matter ejected by type II supernovae
The History of the Atoms in Your Body
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Atoms heavier than iron, such as iodine, were created by:Rapid nuclear reactions that can occur only during supernova explosions
The History of the Atoms in Your Body
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Elements uncommon enough to be expensive—gold, silver, and platinum in the jewelry that humans wear—also were produced: during the violent deaths of rare, massive stars.
The History of the Atoms in Your Body
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Our galaxy contains at least
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Th ...
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- 3. It can be photographed from space!
- 6. First… The types of meteorites.
- 12. Next… The value of meteorites.
- 14. The chemical make-up affects the value : A scanning-electron-microscope photograph of pyroxene and plagioclase crystals (the long and the short crystals, respectively) that grew in a cavity in a fragment of Moon rock gathered during the Apollo 14 mission. – Encyclopedia Britannica - NASA
- 19. Finally… The proven methods utilized by Meteorite Hunters to find meteorites.
- 20. Where, how, and with what tools do Meteorite Hunters search for their treasures?
- 25. Giant Rocks from space!
- 26. Giant Rocks from space!
- 27. Giant Rocks from space!