HIGH RESOLUTION AL-MG CHRONOLOGY OF CHONDRULES AND IMPLICATION TO THE EVOLUTION OF PROTOPLANETARY DISK CHONDRULES IN PRIMITIVE METEORITES ARE CONSIDERED TO RECORD CHEMICAL PROPERTIES AND ISOTOPE RESERVOIRS OF DUST PARTICLES EXISTED IN THE PROTO-PLANETARY DISK. BY USING THE SHORT-LIVED NUCLIDE CHRONOMETER 26AL-26MG (HALF LIFE: 0.7 MILLION YEARS MA) FORMATION TIME OF MOST CHONDRULE ARE ESTIMATED AT 2-3 MA AFTER THE FORMATION OF REFRACTORY INCLUSIONS. HOWEVER DETAILED SYSTEMATICS AMONG AL-MG AGES CHONDRULES IN COMPARISON TO THEIR CHEMICAL AND ISOTOPE PROPERTIES ARE NOT WELL-RESOLVED MAINLY DUE TO THE LIMITATION OF ANALYTICAL UNCERTAINTIES IN INFERRED AGES (TYPICALLY 0.2-0.5 MA). THE GOAL OF THE STUDY IS TO OBTAIN 0.1 MA PRECISIONS AND ACCURACY FOR INFERRED AL-MG AGES IN ORDER TO ADDRESS SEVERAL QUESTIONS THAT WOULD HELP US TO CONSTRAIN DISK EVOLUTION AND CHONDRULE FORMATION MODELS (1) TOTAL RANGE OF CHONDRULE FORMATION AGES IN A SINGLE CHONDRITE GROUP (2) TIME DIFFERENCE BETWEEN FEO-RICH AND FEO-POOR CHONDRULES IN A SINGLE CHONDRITE GROUP (3) TEST PARTIAL MELTING OF PORPHYRITIC CHONDRULES FROM MAGNESIUM ISOTOPE RATIOS OF OLIVINE AND PYROXENE. CHONDRULES ARE SELECTED FROM MULTIPLE PRIMITIVE CHONDRITES THAT WE HAVE ALREADY STUDIED IN THE PAST AND ARE KNOWN TO HAVE MINIMAL EFFECTS OF SECONDARY PROCESSES IN THE PARENT BODIES. SELECTED CHONDRULES WERE EXAMINED BY USING ELECTRON MICROSCOPIES (SCANNING ELECTRON MICROSCOPE ELECTRON MICROPROBE ANALYZER) AND LASER RAMAN SPECTROMETRY AND ANALYZED FOR AL-MG CHRONOLOGY BY USING IMS 1280 AT WISCSIMS. ADDITIONAL OXYGEN ISOTOPE ANALYSES WOULD BE ALSO PERFORMED FOR THOSE THAT WERE NOT ANALYZED PREVIOUSLY. WE WILL DEVELOP METHOD OF HIGH TIME RESOLUTION AL-MG CHRONOLOGY WITH UPGRADED HIGH BRIGHTNESS PRIMARY OXYGEN ION SOURCE. WE WILL ALSO STUDY O-ISOTOPE RATIOS OF CRYSTALLINE SILICATE IN GIANT CLUSTER IDP WHICH ARE CONSIDERED TO BE COMETARY ORIGIN. THE RESULTS FROM IDPS WILL BE COMPARED TO THOSE OF WILD 2 PARTICLES. THE PROPOSED RESEARCH IS TO STUDY CHEMICAL AND ISOTOPIC PROPERTIES OF EARLY SOLAR SYSTEM MATERIALS AND WOULD ENHANCE OUR UNDERSTANDING OF PROTOPLANETARY DISK EVOLUTION. THEREFORE IT IS RELEVANT TO THE SCOPE OF THE EMERGING WORLDS PROGRAM.