Results 131 to 140 of about 32,483 (245)

Regional variation in the Amitsoq gneisses related to crustal levels during late Archean granulite facies metamorphism: Southern west Greenland [PDF]

The dominant lithology at Kangimut sangmissoq is described as nebulitic tonalitic gneiss containing highly distended plagioclase phyric amphibolites. The gneiss amphibolite complex was intruded by Nuk gneiss between 3.05 and 2.90 Ga and later (2.6 to 2.7
Bridgwater, D., Mcgregor, V. R., Nutman, A. P.   +2 more
core   +1 more source

The geological record of life 3500 Ma ago: Coping with the rigors of a young earth during late accretion [PDF]

Thin cherty sedimentary layers within the volcanic portions of the 3,500 to 3,300 Ma-old Onverwacht and Fig Tree Groups, Barberton Greenstone belt, South Africa, and Warrawoona Group, eastern Pilbara Block, Western Australia, contain an abundant record ...
Lowe, Donald R.
core   +1 more source

Deep mantle anomalies block early Earth melting, challenging a primordial origin. [PDF]

Sci Rep
Roy A, Mittelstaedt E, Cooper CM.
europepmc   +1 more source

The Kolar Schist Belt: A possible Archaean suture zone [PDF]

The Kolar Schist Belt represents a N-S trending discontinuity in the structures, lithologies, and emplacement and metamorphic ages of late Archean gneisses.
Balakrishnan, S., Hanson, G. N., Krogstad, E. J., Ragamani, V.   +3 more
core   +1 more source

Phyllosilicate adsorption limited phosphorus bioavailability in early ferruginous oceans. [PDF]

Nat Commun
Cui X, Zhang Z, Li Q, Knoll AH, Zhao G, Sun M, Huang F, Lu X, Li J, Ju P, Hao J.   +10 more
europepmc   +1 more source

The Mantle Fe³⁺/ΣFe Ratio Has Doubled Since the Early Archean. [PDF]

Nat Commun
Zhu XX, Duan WY, Gerya T, Zhou X, Tian JC.   +4 more
europepmc   +1 more source

Molecular Dissipative Structuring: The Fundamental Creative Force in Biology. [PDF]

Entropy (Basel)
Michaelian K.
europepmc   +1 more source

Water-induced mantle overturn explains high Archean paleointensities. [PDF]

Natl Sci Rev
Wang D, Wu Z.
europepmc   +1 more source

Depth of slab breakoff in Archean: the role of radiogenic heat production of continental crust and eclogitization of oceanic crust. [PDF]

Sci Rep
Fan YL, Zhang LF, Wang Y, Li ZH.
europepmc   +1 more source

Records of mantle geodynamics and atmospheric escape in Archean quartz. [PDF]

Sci Adv
Vayrac F, Avice G, Zhang XJ, Parai R, Philippot P.   +4 more
europepmc   +1 more source