WE PROPOSE A TWO YEAR PETROLOGIC-GEOCHEMICAL STUDY TO INVESTIGATE THE EXTENT TO WHICH SECONDARY POST-IGNEOUS ALTERATIONS HAVE MODIFIED THE APOLLO 14 HIGH-ALUMINA MARE BASALTS ESPECIALLY ROCK 14072 AND TO CONTINUE OUR INVESTIGATIONS OF ANALOGOUS SECONDARY ALTERATIONS IN SOME EUCRITE METEORITES. OUR OWN RECENT WORK RELYING MAINLY ON HIGH-RESOLUTION LARGE-AREA BACKSCATTERED ELECTRON (BSE) IMAGING HAS REVEALED THAT 14072 CONTAINS MANY HUNDREDS OF TINY OLIVINE-DOMINATED VEINS OF APPARENT SILICATE-METASOMATIC ORIGIN. PREVIOUS DETAILED PETROLOGIC STUDIES OF 14072 MAINLY CONCENTRATED ON ITS UNCOMMON ABUNDANCE OF SECONDARY REDUCTION FEATURES AND DID NOT DETECT THE SILICATE ALTERATION VEINS. THE VEINS SHOW A VERY SYSTEMATIC DISTRIBUTION COMMON IN THE INTERIORS OF LARGE PYROXENES BUT NOT IN LATER BSE-BRIGHT PYROXENE. SECONDARY VEINS ARE VIRTUALLY ABSENT IN THE OTHER MAJOR 14072 MINERAL PLAGIOCLASE. WE INFER THAT THE VEINS WERE DEPOSITED BY A CHEMICAL-REACTIVE WALLROCK-DEPENDENT PROCESS NOT INJECTED. THE FLUID THAT TRANSPORTED MAJOR SILICATE CATIONS WITHIN 14072 MUST HAVE HAD A SIGNIFICANT COMPONENT OF STRONGLY POLAR MOLECULES WHICH IMPLIES MOST LIKELY A SIGNIFICANT COMPONENT OF H2O. WE PROPOSE TO ACQUIRE FURTHER KNOWLEDGE OF THE SILICATE-METASOMATIC PROCESSING OF 14072 BY APPLICATION OF HIGHER-RESOLUTION ANALYTICAL TECHNIQUES (FIB-TEM); BY CONTINUED EXPLORATION OF ADDITIONAL AREAS OF THIS MANIFESTLY HETEROGENEOUS ROCK; BY ELECTRON MICROPROBE (EPMA) STUDIES AIMED AT ELUCIDATING THE RELATIONSHIP BETWEEN LOCAL VEIN ABUNDANCE AND LOCAL INTENSITY OF LATE REDUCTION AND THE RELATIONSHIP BETWEEN REDUCTION AND THE LATER STAGES OF IGNEOUS CRYSTALLIZATION; AND BY APPLYING SIMILAR SCRUTINY TO OTHER MARE BASALTS STARTING WITH OTHER APOLLO 14 MARE BASALTS IN ORDER TO CONSTRAIN HOW WIDESPREAD THE SECONDARY-VEIN DEPOSITION PROCESS MAY HAVE BEEN -- IS 14072 TRULY UNIQUE? IN SUPPORT OF THE WORK ON 14072 WE ALSO PROPOSE TO CONTINUE OUR PETROLOGIC STUDIES OF STRONGLY ANALOGOUS REDUCED LOW-THERMAL-METAMORPHISM SILICATE-METASOMATIZED EUCRITES.