圆锥体
发表于 2025-3-30 11:25:54
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harbinger
发表于 2025-3-30 14:03:37
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Substance-Abuse
发表于 2025-3-30 18:59:42
The Plume to Plate Transition: Hadean and Archean Crustal Evolution in the Northern Wyoming Provinc- and plate-regimes in the generation of Hadean and Archean continental crust, and the associated elemental depletion of the primitive mantle. The most complete record is exposed in the Beartooth Mountains (Montana-Wyoming), which lie within the Beartooth-Bighorn magmatic zone (BBMZ) sub-province of
过分
发表于 2025-3-30 21:06:25
The Archaean Karelia and Belomorian Provinces, Fennoscandian Shield,rom c. 3.50 to 2.66 Ga. Neoarchaean rocks are dominant, since Paleoarchaean and Mesoarchaean granitoids (> 2.9 Ga) are only locally present. The granitoid rocks can be classified, based on their major and trace element compositions and age, into four main groups: TTG (tonalite-trondhjemite-granodior
Merited
发表于 2025-3-31 01:02:17
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范围广
发表于 2025-3-31 06:16:31
A Review of the Geodynamic Significance of Hornblende-Bearing Ultramafic Rocks in the Mesoarchean F consist mainly of hornblendite, hornblende peridotite, hornblende pyroxenite, and dunite. Despite upper amphibolite to granulite facies metamorphism, poly-phase deformation and multiple granitoid intrusions, primary igneous layers and mineral assemblages have been well preserved. Petrographic studi
极深
发表于 2025-3-31 11:28:25
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LINE
发表于 2025-3-31 17:15:54
How to Make a Continent: Thirty-five Years of TTG Research, of these peculiar rocks. What we do know is that TTGs are similar in composition regardless of age, they have high La/Yb, Sr/Y, Sr and Eu/Eu*, they decrease in abundance relative to calc-alkaline granitoids at the end of the Archean, and they are not made in oceanic arcs, shallow levels of oceanic