Nagy et at. : Environment of Orgueil Meteorite Parent Body 539 



meteorite may be part of the primitive earth ''shot off some hundreds of milUons 

 of years ago and again united to its parent body." It was, therefore, deemed 

 necessary to determine whether Orgueil is really a meteorite of extraterrestrial 

 origin. 



Chondrites, as well as sedimentary and igneous rocks on earth, have char- 

 acteristic trace element distribution patterns. Fifteen trace elements were 



Table 2 

 Chemical Analyses of 4 Meteorites 



* After Wiik.6 



t After Mason and Wiik.^' 



t Includes ail forms of sulfur, including elementarj^ sulfur. There is no X-ray diffraction 

 evidence that FeS, as such, occurs in Orgueil. 

 Note. 



H2O, C, and S have been reduced from the value of the loss on ignition. The oxidation 

 of FeO, Fe, Ni, and Co have been taken into consideration. The ignition loss as given, is 

 an approximate estimate of the amount of organic matter. 



H20~ refers to water removed below 110° C. temperature, H2O+ to water obtained above 

 that temperature. 



determined in Orgueil sample (A) by emission spectroscopy. Another ele- 

 ment, phosphorus, was determined spectrophotometrically by the molybdenum 

 blue method. A Jarrell-Ash, 3.4 m. spectrograph (15,000 lines per inch grating) 

 was used for the trace element analysis. All determinations were made in 

 duplicate. Germanium was used as internal standard for cobalt, chromium, 

 copper, manganese, nickel, and vanadium. No internal standard was used for 

 barium, gallium, lithium, strontium, zirconium, scandium, cesium, and rubid- 

 ium because these elements were below the limits of detection. No internal 



