| 期刊全稱(chēng) | Archaean Geochemistry | | 期刊簡(jiǎn)稱(chēng) | The Origin and Evolu | | 影響因子2023 | A. Kr?ner,G. N. Hanson,A. M. Goodwin | | 視頻video | http://file.papertrans.cn/162/161164/161164.mp4 | | 圖書(shū)封面 |  | | 影響因子 | Archaean Geochemistry 1972 - 1984 The realisation that the continental crust contains well-preserved relics which date as far back as 4/5 of the Earth‘s age has given a great impetus to the study of early Precambrian terrains. As late as the mid-sixties the Archaean still constituted the ‘terra-in- cognita‘ of earth science. High metamorphic grades, poor out- crop, and not least a widely assumed obliteration of early crustal records by convective recycling and thermal reworking had com- bined to discourage research in this field. Many excellent local studies existed, notably around gold mining centres, but remained unrelated to a broader regional and theoretical understanding. This situation has changed as the consequence of two inter-related factors: (1) advances in isotopic methods and their application to Precambrian rocks, and (2) the recognition that some of the oldest terrains have retained a wealth of primary igneous and sedi- mentary textures and even geochemical characteristics. | | Pindex | Conference proceedings 1984 |
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