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Ascending Heat and Mass Flow in Continental Crust: on the Problem of Driving Forces of Tectogenesis
Izvestiya, Physics of the Solid Earth ( IF 0.9 ) Pub Date : 2020-07-01 , DOI: 10.1134/s1069351320030088
B. G. Polyak , I. N. Tolstikhin , M. D. Khutorskoi

The geophysical and geochemical indicators of the ascending heat and mass flow in the continental crust—conductive heat flow through the surface of the crust and the isotopic composition of helium in freely circulating underground fluids—are considered. The tectonic ordering of the heat flow and the factors responsible for the dispersion in its density (q) are discussed. The sources and reservoirs of terrestrial helium are characterized; the stability of 3Не/4Не ratio in the geological section along the depth and in time is demonstrated; linear and areal variations in this ratio on different scales are revealed and their similarity with heat flow distribution is established. The correlations of helium isotopic composition in freely circulating underground fluids with the conductive heat flow density and helium composition in gases in the regions of recent volcanism as well as with strontium composition in young lavas indicate helium transport from the mantle to the crust by the magmatic melts.

中文翻译:

大陆地壳的上升热流和质量流:论构造作用的驱动力问题

考虑了大陆地壳中上升的热量和质量流的地球物理和地球化学指标——通过地壳表面的传导热流和自由循环地下流体中氦的同位素组成。讨论了热流的构造排序和导致其密度 (q) 分散的因素。对陆地氦的来源和储存库进行了表征;3Н/4Н比在地质剖面沿深度和时间的稳定性得到证明;揭示了该比率在不同尺度上的线性和面积变化,并确定了它们与热流分布的相似性。
更新日期:2020-07-01
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