ORIGINS OF SECONDARY MINERALS IN INTERPLANETARY DUST PARTICLES AND MICROMETEORITES THIS PROPOSAL AIMS TO UNDERSTAND THE ORIGIN OF HYDRATED INTERPLANETARY DUST PARTICLES (IDPS) AND MICROMETEORITES USING DETAILED DESCRIPTIONS OF THE MINERALOGY AND ISOTOPIC COMPOSITIONS OF SECONDARY PHASES. WE WILL USE ELECTRON MICROSCOPY TO DETERMINE THE MINERAL COMPOSITION OF SECONDARY PHASES AND SECONDARY-ION MASS SPECTROMETRY TO MEASURE THE O H AND MN-CR ISOTOPE SYSTEMATICS OF SELECTED PHASES. THE PROPOSED RESEARCH WILL HAVE IMPORTANT IMPLICATIONS FOR UNDERSTANDING THE MECHANISMS AND FORMATION TIMES OF SECONDARY MINERALS IN HYDRATED PARTICLES AND CAN POTENTIALLY DISTINGUISH BETWEEN ASTEROIDAL AND COMETARY ALTERATION. ADDITIONALLY THIS WORK WILL PROVIDE INSIGHTS INTO THE GENETIC RELATIONSHIP BETWEEN ANHYDROUS AND HYDRATED IDPS AND MICROMETEORITES THE STARDUST COMETARY SAMPLES AND CARBONACEOUS CHONDRITES. SCIENCE GOALS AND OBJECTIVES RECENTLY IT WAS POSTULATED THAT ~90% OF SMALL DEBRIS PARTICLES (~10-300 M) FROM THE ZODIACAL CLOUD ORIGINATE FROM THE BREAKUP OF JUPITER-FAMILY COMETS (JFCS) AND THE REMAINING ~10% COME FROM OORT-CLOUD COMETS AND/OR ASTEROID COLLISIONS. HOWEVER IN THE INTERPLANETARY DUST PARTICLES (IDP) COLLECTIONS APPROXIMATELY HALF OF THE PARTICLES ARE DOMINATED BY HYDROUS SECONDARY PHASES THAT ARE TRADITIONALLY THOUGHT TO HAVE FORMED IN AQUEOUS PROCESSES ON ASTEROIDS. WE HYPOTHESIZE THAT A SIGNIFICANT FRACTION OF THESE HYDRATED IDPS ARE DERIVED FROM JUPITER-FAMILY COMETS. THIS HYPOTHESIS ALSO EXTENDS TO HYDRATED MICROMETEORITES WHICH LIKELY ORIGINATE FROM SIMILAR PARENT BODIES AS IDPS. WE WILL TEST THIS HYPOTHESIS BY LOOKING FOR VARIATIONS IN THE PETROGRAPHY AND ISOTOPIC COMPOSITION OF SECONDARY PHASES IN HYDRATED IDPS AND MICROMETEORITES THAT COULD BE INDICATIVE OF EITHER AN ASTEROIDAL OR COMETARY ORIGIN. OUR RESEARCH WHETHER OUR HYPOTHESIS IS PROVEN OR DISPROVEN WILL RESULT IN A BETTER UNDERSTANDING OF THE ORIGIN AND EVOLUTION OF DUST IN THE SOLAR SYSTEM AND THE EFFECT OF WATER ON PRIMITIVE BODIES. METHODOLOGY HYDRATED COMETARY IDPS AND MICROMETEORITES MAY DIFFER FROM HYDRATED ASTEROIDAL PARTICLES IN THE DETAILED MINERALOGY RELATING TO HYDRATION PROCESSES (ASTEROIDAL AQUEOUS ALTERATION HAS BEEN STUDIED EXTENSIVELY IN METEORITES WE SUSPECT COMETARY ALTERATION TO BE SOMEWHAT DIFFERENT) THE TIMING OF AQUEOUS ALTERATION (TO DETERMINE IF METEORITES UNDERWENT AQUEOUS ALTERATION AT A DIFFERENT TIME THAN COMETS) AND THE O AND H ISOTOPIC COMPOSITION OF SECONDARY MINERALS (COMETARY AND ASTEROIDAL WATER MAY HAVE DIFFERENT O AND H ISOTOPIC COMPOSITION DUE TO THE PRESENCE OF SPATIALLY DISTINCT WATER RESERVOIRS IN THE SOLAR NEBULA). WE WILL INVESTIGATE THE DETAILED MINERALOGY OF HYDRATED IDPS AND MICROMETEORITES USING ELECTRON-BEAM TECHNIQUES: SEM ELECTRON PROBE AND TEM AT THE UNIVERSITY OF NEW MEXICO (UNM). WE WILL MEASURE STABLE (O AND H) AND SHORT-LIVED RADIONUCLIDE (MN-CR) ISOTOPE SYSTEMS USING THE UNIVERSITY OF HAWAII (UH) ION PROBE. HANDLING AND MOUNTING OF THESE SMALL GRAINS IS CHALLENGING BUT BOTH PI DOBRICA AND CO-I OGLIORE HAVE MANY YEARS EXPERIENCE HANDLING SMALL SAMPLES AND HAVE DEVELOPED INDEPENDENT TECHNIQUES FOR THE PREPARATION OF IDPS AND MICROMETEORITES FOR ION PROBE AND E-BEAM ANALYSIS. RELEVANCE TO THE EMERGING WORLDS PROGRAM THE EMERGING WORLDS PROGRAM COVERS THE PHYSICS AND CHEMISTRY OF EVENTS AND MATERIALS THAT ARE RELEVANT TO THE FORMATION OF PLANETS SATELLITES AND MINOR BODIES INCLUDING DUST AND TO THE EARLY HISTORY OF THESE BODIES". IN PARTICULAR OUR PROPOSED WORK WITH IDPS AND MICROMETEORITES DIRECTLY INVESTIGATES: THE CHEMICAL AND PHYSICAL PROPERTIES OF ANCIENT MATERIALS (INCLUDING ASTEROIDS AND COMETS)" AS WELL AS STUDIES OF CHEMICAL AND ISOTOPIC PROPERTIES OF PLANETARY MATERIALS" AS STATED IN C.2 EMERGING WORLDS OF 2015 NASA-ROSES.