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- W1987071601 abstract "There is evidence that during 4.3-3.9 Ga the Earth experienced a period of intense bombardment similar to that recorded on the moon. From cratering mechanics and by comparison with more recent terrestrial impact structures the effects of large impact structures, D ⩾ 100 km, have been modelled for an early terrestrial proto-crust with an assumed thickness of 15 km. The direct effects were analogous to those on the Moon: the formation of multi-ring basins with a topography of ∼ 3 km, the uplift of deep-seated material to the surface, the fracturing of the crustal column and the generation of surface impact lithologies. However, unlike the Moon, the highly active nature of the Earth resulted in more long-lived indirect effects: impact-induced volcanism due to distortion of the geothermal gradient by uplift and the addition of post-shock heat, intra-basin sedimentation by volcaniclastics and reworked impact lithologies and ultimately subsidence of the basin due to loading by volcanic and sedimentary products. Very large basins, D > 1000 km, excavated the local lithosphere and produced the equivalent of mantle plumes below the impact sites. These conclusions are incorporated into a model of early crustal evolution of the Earth in which the net effect of large impact events was to localize and accelerate endogenic activity. In this scenario, the intense bombardment culminated at 3.9 ± 0.1 Ga with a period of heavy bombardment by a residual population of 10–100-km-sized bodies. The impact of these bodies represented a first-order event in the progressive evolution of the proto-crust. The resultant mare basin-sized structures overlapped in space and their effects overlapped in time to give rise to large areas, 105–104 km2, of vigorous endogenic activity and thermally and geologically anomalous crust. Subsidence of these major basins resulted in the reprocessing of large volumes of basaltic volcanics and impact melt leading to the production of sialic partial melts. Large impacts thus may have been a triggering mechanism for the generation of extensive concentrations of differentiated crust and for a proto-crust of basaltic composition would have been the loci of protocontinental nuclei production. Further reworking of these nuclei and subsequent cratonization by strictly internal mechanisms would have produced the stable shield areas during the Late Archean." @default.
- W1987071601 created "2016-06-24" @default.
- W1987071601 creator A5011656018 @default.
- W1987071601 date "1980-02-01" @default.
- W1987071601 modified "2023-09-25" @default.
- W1987071601 title "Impact bombardment and its role in proto-continental growth on the early earth" @default.
- W1987071601 cites W1603236654 @default.
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- W1987071601 cites W1972389167 @default.
- W1987071601 cites W1972679644 @default.
- W1987071601 cites W1973278816 @default.
- W1987071601 cites W1975643184 @default.
- W1987071601 cites W1976011966 @default.
- W1987071601 cites W1980531664 @default.
- W1987071601 cites W1980897730 @default.
- W1987071601 cites W1985574394 @default.
- W1987071601 cites W1987659983 @default.
- W1987071601 cites W1989010159 @default.
- W1987071601 cites W1989334884 @default.
- W1987071601 cites W1989986197 @default.
- W1987071601 cites W1992997662 @default.
- W1987071601 cites W1998775290 @default.
- W1987071601 cites W1999454216 @default.
- W1987071601 cites W1999493995 @default.
- W1987071601 cites W2008535000 @default.
- W1987071601 cites W2011636272 @default.
- W1987071601 cites W2014223401 @default.
- W1987071601 cites W2015874123 @default.
- W1987071601 cites W2023635164 @default.
- W1987071601 cites W2024217823 @default.
- W1987071601 cites W2030255868 @default.
- W1987071601 cites W2033312906 @default.
- W1987071601 cites W2040230542 @default.
- W1987071601 cites W2045072732 @default.
- W1987071601 cites W2050970793 @default.
- W1987071601 cites W2058193338 @default.
- W1987071601 cites W2059638485 @default.
- W1987071601 cites W2060902390 @default.
- W1987071601 cites W2062155846 @default.
- W1987071601 cites W2063015921 @default.
- W1987071601 cites W2064862216 @default.
- W1987071601 cites W2068714801 @default.
- W1987071601 cites W2069113674 @default.
- W1987071601 cites W2075324046 @default.
- W1987071601 cites W2079143693 @default.
- W1987071601 cites W2079596351 @default.
- W1987071601 cites W2083901901 @default.
- W1987071601 cites W2087295871 @default.
- W1987071601 cites W2087953434 @default.
- W1987071601 cites W2092610717 @default.
- W1987071601 cites W2093201436 @default.
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- W1987071601 cites W2118557723 @default.
- W1987071601 cites W2121039178 @default.
- W1987071601 cites W2122606428 @default.
- W1987071601 cites W2138707304 @default.
- W1987071601 cites W2138749422 @default.
- W1987071601 cites W2143186351 @default.
- W1987071601 cites W2153846210 @default.
- W1987071601 cites W2170011109 @default.
- W1987071601 cites W2178445398 @default.
- W1987071601 cites W2324444940 @default.
- W1987071601 cites W2334172779 @default.
- W1987071601 cites W2912483625 @default.
- W1987071601 cites W4250634934 @default.
- W1987071601 cites W79616313 @default.
- W1987071601 doi "https://doi.org/10.1016/0301-9268(80)90013-3" @default.
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