A solar origin for the large lunar magnetic field at 4.0 billion yr ago

摘要: A new method (Shaw, 1974) for paleointensity determination has been applied to three subsamples of one polymict breccia, 72215 (of age 4.0 billion yr) yield an average 0.41 Oe at the Taurus-Littrow region moon around time breccia formation. Of present models lunar magnetism, only Sonett and Runcorn (1974) model a central iron core dynamo can explain presence such large field in early history. However, because similarity size this that solar system deduced from carbonaceous chondrites, we draw attention apparently little-considered possibility: magnetic history was external origin, emanated pre-main sequence T-Tauri stage sun. Therefore, there should be no record rocks younger than approximately yr.