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rock > igneous rock > differentiated meteorite > metal-rich meteorite > iron meteorite > magmatic iron meteorite > type IIIAB iron meteorite > Bur-Abor

Bur-Abor
subject			fact

Bur-Abor	has image
	has name Bur-Abor
	is an instance of Om octahedrite
	is an instance of type IIIAB iron meteorite
	has find date November 27, 1997
	has fall location Bur-Abor, North-Eastern province, Kenya
	has fall coordinates Latitude 3 degrees 59 minutes North, Longitude 41 degrees 39 minutes East
	has original mass greater than 300 kg
	have composition Ni content of kamacite, 6±0.5 wt%; bulk metal, Co=0.513%, Ni=7.99%: Ga=20.9 ppm; As=6.24 ppm; Ir=0.774 ppm; Au=0.83 ppm.
	has crystal size 0.95 mm (medium)
Om octahedrite	has structural class Om
type IIIAB iron meteorite	has composition kamacite, taenite, trolite, phosphides
	has formation cooling rate 3 to 75 degrees C per million years
	parent body radius 20 to 90 kilometers
	has total mass of finds 128986 kg
	has number of finds 157
	has nickel content 8.49 % by weight
	has gallium content 19.7 microgram/gram
	has germanium content 38.9 microgram/gram
	has iridium content 4.1 microgram/gram
	has carbon content 140 microgram/gram
	has phosphor content 5.6 milligram/gram
	has sulfur content 1.4 % by weight
	has chromium content 40 microgram/gram
	has cobalt content 5.0 milligram/gram
	has copper content 160 microgram/gram
	has molydbenum content 7.2 microgram/gram
	has tungsten content 1 microgram/gram
	has palladium content 3.5 microgram/gram
	has gold content 1.2 microgram/gram
	has arsenic content 10.5 microgram/gram
	has antimony content 265 nanogram/gram
structural iron meteorite	has distinguishing feature crystalline iron-nickel alloy
iron meteorite	has relative abundance 5.7 % of meteorite falls
	has weather resistance high
	has fragmentation probability low because it is tougher than stony meteorite
	has ablative mass loss low because it has higher tensile strength than stony meteorite
metal-rich meteorite	has metal content higher than that of average solar system material
differentiated meteorite	has origin planet or asteroid much larger than 100 km in diameter
meteorite	has fall date recorded by eyewitness or inferred from dating methods
	has fall map which appears as an elongated footprint which depends on impact angle, airbursts, and impact velocity
	can have crater image
	has impact velocity when it hits the ground which is smaller than its velocity before it enters the atmosphere
	has impact angle
	has monetary value large if the fall was witnessed
	often produce power outages and failures in electrical equipment due to EMP (electromagnetic pulse)
	can be associated with crater
	vaporizes completely if size is between 3 micrometers and 3 millimeters
	can survive fall if size is larger than 3 mm and velocity is less than 24 km per second
	can survive fall if it fragments because smaller pieces with less mass are more easily slowed by the atmosphere
	can shatter during impact phase
	can fragment during meteor phase
igneous rock	has solidification mechanism
	has solidification timescale
rock	has part mineral
	has texture
	has genesis

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