Fig. 9: Provenance assessment of weathered basement. | Communications Earth & Environment

Fig. 9: Provenance assessment of weathered basement.

From: Continental weathering and recovery from ocean nutrient stress during the Early Triassic Biotic Crisis

Fig. 9: Provenance assessment of weathered basement.The alternative text for this image may have been generated using AI.

a SEM-CL images of quartz grains from the weathered basement and early Jurassic sediment cover in well 6408/12-U-01 and 6814/4-U-01. Note the similarities of the grains suggesting that the Mesozoic sediment cover are derived locally from a weathered basement. b Concentration of Al versus Li (in µgg−1) of quartz grains in the weathered basement and overlying Mesozoic sediments in wells 6814/4-U-01 and 6408/12-U-01. Note the correspondence between the weathered basement and overlying Mesozoic sediment cover in both wells.

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