MANY METEORITES CONTAIN A VARIETY OF COMPONENTS SUCH AS CHONDRULES CAIS MATRIX AND MANY ARE BRECCIATED. IN THESE UNEQUILIBRATED MATERIALS THE DEGREE OF VARIATION IN BOTH #18O AND #17O BETWEEN INDIVIDUAL COMPONENTS WITHIN A SPECIFIC METEORITE GROUP IS NOT WELL KNOWN DUE TO THE FINE-GRAINED CHARACTER AND DIFFICULTY IN EXTRACTING SMALL AMOUNTS OF PURIFIED MATERIAL FROM RARE METEORITES. IN SITU MEASUREMENTS CAN BE MADE USING THE SECONDARY ION MICROPROBE BUT THIS TECHNIQUE IS LIMITED TO PURE MINERALS AND HAS INSUFFICIENT PRECISION IN 17O/16O DETERMINATIONS FOR MANY APPLICATIONS. TO OVERCOME THESE DIFFICULTIES WE ARE DEVELOPING A NOVEL ANALYTICAL PROCEDURE COMBINING THE ULTRA-HIGH SPATIAL RESOLUTION OF A FOCUSED ION BEAM (FIB) WITH A HIGH-PRECICION CONTINUOUS FLOW-BASED MICRO-FLUORINATION EXTRACTION LINE THAT WILL ALLOW US TO REDUCE SAMPLE SIZE AND INCREASE PRECISION FOR BOTH #18O AND #17O ANALYSES OF METEORITIC MATERIALS. INITIALLY WE PROPOSE TO DETERMINE THE OXYGEN ISOTOPE COMPOSITION OF 1) INDIVIDUAL COMPONENTS OF CHONDRITES (E.G. PAIRED MATRIX AND CHONDRULES) 2) COMPONENTS OF BRECCIATED METEORITES SUCH AS THE UNIQUE MICROBRECCIA KAIDUN AND 3) MINERAL SEPARATES FROM MARTIAN? BASALTIC BRECCIA NWA 7034 AND TISSINT THE FIRST OLIVINE-PHYRIC SHERGOTTITE FALL. FOLLOWING PETROGRAPHIC AND MINERALOGICAL CHARACTERIZATION (E.G. SEM MICROPROBE) WE ARE USING FIB TECHNIQUES FOR THE EXTRACTION OF SMALL INDIVIDUAL COMPONENTS (~4G) FROM THE METEORITES. THESE EXTRACTED SAMPLES ARE TRANSFERRED TO THE MICRO CO2 LASER-FLUORINATION LINE COUPLED TO A CONTINUOUS-FLOW (CF) MASS SPECTROMETER SYSTEM FOR ANALYSIS OF BOTH #18O AND #17O VALUES. WITH THIS RESEARCH WE WILL BE ABLE TO ADD PREVIOUSLY UNSEEN DETAILS OF THE OXYGEN ISOTOPIC EVOLUTION OF THE SOLAR NEBULA OF THE MAKING OF ASTEROID MATERIAL AND OF SECONDARY PROCESSES. WE PROVIDE CRITICAL INFORMATION ABOUT THE PROCESSES THAT OPERATED BOTH IN THE NEBULA AND SUBSEQUENTLY ON A DIVERSE RANGE OF PARENT BODIES FROM SMALL PRIMITIVE ASTEROIDS TO PLANETARY-SIZED BODIES. A BETTER UNDERSTANDING OF THESE PROCESSES WILL FURTHER THE DEVELOPMENT OF CONCEPTS ON HOW OXYGEN ISOTOPE COMPOSITIONS OF THE TERRESTRIAL PLANETS CAN BE ACCOUNTED FOR IN TERMS OF THE EVOLUTION OF THE PROTOPLANETARY DISK. SECONDLY THE DEVELOPMENT OF A HIGH PRECISION MICROANALYTICAL TECHNIQUE FOR BOTH #17O AND #18O ANALYSES OF MICROGRAM MATERIAL WILL FUNDAMENTALLY CHANGE THE TYPES OF ANALYSES THAT CAN BE MADEBY THE METEORITE COMMUNITY. THIS WORK IS PART OF THE COSMOCHEMISTRY TASK OF NASA'S STRATEGIC GOALS (SUB-GOAL 2.3) TO ADVANCE SCIENTIFIC KNOWLEDGE OF THE ORIGIN AND HISTORY OF THE SOLAR SYSTEM. THE OUTCOME OF THE PROPOSED RESEARCH WILL LEAD TO PROGRESS IN LEARNING HOW THE SUN'S FAMILY OF PLANETS AND MINOR BODIES ORIGINATED AND EVOLVED (NASA RESEARCH OBJECTIVE 3.3). THIS IS A FIRST PROPOSAL OF THE PI TO NASA AND THE COSMOCHEMISTRY PROGRAM.