Abstract The Chapada Diamantina region in the São Francisco craton of eastern Brazil is composed sedimentary successions containing both Mesoproterozoic and Neoproterozoic carbonate levels, making it a key natural laboratory for understanding fluctuations Earth's biogeochemical cycles during its middle age. ca. 1.4–1.2 Ga Caboclo Formation stromatolites yielded unfractionated δ53Crauth (authige...

A Silurian shift in fluvial stratigraphic architecture, coincident with the appearance of terrestrial vegetation fossil record, is traditionally cited as evidence for exclusively shallow, braided planforms pre-vegetation rivers. While recent recognition deep, single-thread channels pre-Silurian strata challenge this paradigm, it unclear how these rivers maintained stable banks. Here, we reconst...

The Mesoproterozoic Xiamaling Formation (∼1.4 Ga) is considered to be a set of promising strata for shale oil and gas exploration production in the Yanliao Basin, North China Craton. This study aimed investigate organic matter accumulation mechanism, hydrocarbon generation expulsion characteristics Formation, using various methods, including scanning electron microscopy, rock-eval pyrolysis, el...

Abstract The terminal Mesoproterozoic was a period of widespread tectonic convergence globally, culminating in the amalgamation Rodinia supercontinent. However, Laurentia, long-lived orogenesis on its eastern margin punctuated by short-lived extension that generated Midcontinent Rift ca. 1110–1090 Ma. Whereas this cratonic rift basin is typically considered an isolated occurrence, series new de...

U–Pb ages were obtained on single detrital zircon grains separated from six samples of Neoproterozoic and Lower Palaeozoic sedimentary and volcanosedimentary rocks from NW Iberia using the laser ablation microprobe-inductively coupled plasma mass spectrometry (LAM-ICP-MS) method. Precambrian greywackes yielded abundant zircons with Neoproterozoic (800–640 Ma) and Mesoproterozoic (0.9–1.2 Ga) ag...

Introduction: The ~10 km in diameter, deeply eroded Paasselkä impact structure [1-3] (Fig. 1), hosted by ~1.9 Ga Paleoproterozoic crystalline rocks of the Svecofennian Domain of the Baltic Shield (e.g., [4]), is the third largest of eleven impact structures currently known in Finland [5]. A recent geological summary of the Paasselkä impact structure and a petrographic-geochemical description of...