000			02369nab a2200349 c 4500
001			koha000997760
005			20230310150953.0
007			cr |
008			230309|2022 enk s a eng d
024	7		_a10.1111/ter.12594 _2doi
035			_akoha000997760
040			_aRU-ToGU _brus _cRU-ToGU
245	1	0	_aLarge igneous provinces track fluctuations in subaerial exposure of continents across the Archean–Proterozoic transition _cJ. Liebmann, C. J. Spencer, C. L. Kirkland, R. E. Ernst
336			_aТекст
337			_aэлектронный
504			_aБиблиогр.: с. 328-329
520	3		_aGeological observations and numerical models imply that Archean continents were mostly submarine. In contrast, approximately one third of modern earth's surface area consists of subaerial continental crust. To temporally constrain changes in the subaerial exposure of continents, we evaluate the eruptive environment (submarine vs subaerial) of 3.4–2.0 Ga continental large igneous provinces (LIPs). Our results indicate that up until 2.4 Ga LIPs predominantly erupted onto submerged continents. This period of low freeboard was punctuated by local subaerial eruptions at 2.8–2.7 Ga and 2.5 Ga. From 2.4 Ga–2.2 Ga, extensive subaerial continental volcanism is recorded in six different cratons, supporting widespread subaerial continents at this time. An increase in exposed continental crust significantly impacts atmospheric and oceanic geochemical cycles and the supply of nutrients for marine bioproductivity. Thus, the 2.4–2.2 Ga high-freeboard conditions may have triggered the earliest global glaciation event and the first significant rise of atmospheric oxygen.
653			_aкрупные магматические провинции
653			_aсубаэральная экспозиция
653			_aархей
653			_aконтиненты
655		4	_aстатьи в журналах _9878294
700	1		_aLiebmann, Janne _9878293
700	1		_aSpencer, Christopher J. _9878295
700	1		_aKirkland, Christopher L. _9878296
700	1		_aErnst, Richard E. _9218658
773	0		_tTerra Nova _d2022 _gVol. 34, № 4. P. 323-329 _x1365-3121
852	4		_aRU-ToGU
856	4		_uhttp://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000997760
908			_aстатья
999			_c997760