Two stages of granitoid intrusions and their implications on the early Paleoproterozoic tectonic evolution of the Quanji Massif

Sun, Liguang; Wang, Kaixing; Liu, Xiaodong; Liu, Wenheng; Yu, Chi-Da; Liao, Hong-Ze

doi:10.1016/j.lithos.2020.105479

Cited by 7 publications

(1 citation statement)

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“…The analysis of major‐ and trace‐element geochemistry of the rock and the iron‐oxide mat samples were conducted in the laboratory of ALS Chemex Co. Ltd, Guangzhou, China. Major elemental compositions were analyzed using the ME‐XRF26d analytical protocol, and trace element analysis was performed by ICP‐MS following the method of M61‐MS81 (Sun et al., 2020).…”

Section: Sampling and Methodsmentioning

confidence: 99%

Early Prosperity of Iron Bacteria at the End of the Paleoproterozoic Era

Qiu

Qin

Huang

et al. 2022

Geophysical Research Letters

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Various iron formation (IFs) document the interplay between the geosphere and the early biosphere during their co‐evolution. At the transition between the Paleo‐ and Mesoproterozoic eras, the oxidation of the atmosphere and ocean resulted in the waning of the typical marine deposited banded IFs. Here, we report the ∼1.7 Ga Yunmengshan IF at the southern margin of the North China Craton deposited in the intertidal to upper subtidal zone belonging to river delta of coastal environments. The combined REE + Y patterns and negative δ56Fe with positive δ53Cr values reveal terrestrial precipitation of iron oxide and an enhanced continental oxidative weathering at the end of Paleoproterozoic era due to increased atmospheric oxygen level. The oxygen level happened to have facilitated the early prosperity of microaerophilic Fe(II)‐oxidation bacteria on Earth's terrestrial surface, which is recorded by the coastal shallow water iron deposits globally characterized by their small scale and subaerial features.

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Section: Sampling and Methodsmentioning

confidence: 99%