Intrepid
发表于 2025-3-28 18:01:58
Proposed Sources of Hadean Zircons,rologic observations of Hadean Jack Hills zircons. These are: (1) a zircon sub-population enriched in .O and depleted in .Si relative to mantle values; (2) low crystallization temperatures; (3) the presence of primary hydrous mineral inclusions; (4) the predominance of magmatic muscovite, quartz, an
Preamble
发表于 2025-3-28 21:30:58
Could the Hadean Eon Have Been Habitable?,ns can provide some constraints. We are certain that life as we know it would not be possible without four requirements; soluble bioactive elements (carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorous), free energy, liquid water, and time. Beyond these essential ingredients, there is broad ag
严厉谴责
发表于 2025-3-29 01:10:48
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expunge
发表于 2025-3-29 07:06:48
Collectanea,arth history saw a desiccated, lifeless, molten wasteland is worthy of analysis. This chapter addresses problematic aspects of our epistemology that led to this paradigm and concludes that the historical sciences can sometimes be influenced by the same existential urges for control that fueled the p
不适
发表于 2025-3-29 09:52:00
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傲慢人
发表于 2025-3-29 11:26:13
Eric Magnus Campbell Tigerstedt, with missteps related to as yet undiscovered physics or fundamentally incorrect assumptions. While the former is unavoidable, the latter amounts to self-inflicted wounds that may have forestalled scientific progress. Even in the absence of knowledge of initial conditions, linear mathematical relati
reptile
发表于 2025-3-29 18:51:09
https://doi.org/10.1007/978-3-540-74038-4ryos during runaway accretion that occurred within 1–10 Ma of formation of the first solar system solids at 4.567 ± 0.001 Ga. Both long- and short-lived radionuclides leave isotopic signatures in mantle rocks that bear on when and how the silicate Earth formed and differentiated. The longstanding vi
故意钓到白杨
发表于 2025-3-29 22:03:16
From Institution to Self-regulationtest to conditions then extant in the inner solar system. The concept of a lunar cataclysm at ~3.9 Ga grew from seemingly contradictory observations of elemental fractionation in lunar highland rocks. U–Pb—and some Rb–Sr—data suggested recrystallization occurred between about 4.0 and 3.8 Ga. The Lat
labile
发表于 2025-3-30 01:56:57
https://doi.org/10.1057/9781137455062ere is widespread agreement that plate tectonics has been doing just that for at least the past billion years. We also don’t fully understand the structure of the continental crust; popular layered models lack mechanisms to produce such structures or to recover them following tectonic homogenization