XRD patterns of selected Fe nodule and soil samples from profiles XY and PG.

<p>G–gibbsite, Go–goethite, H–hematite, I–illite, K–kaolinite, Or–orthoclase, P–pyrophyllite, Q–quartz, S–smectite, C–calcite.</p

Le Petit Marocain

08 octobre 19421942/10/08 (A30,N7303)-1942/10/08

A map of the studied area illustrating locations, sampling sites, stratigraphic and structural characteristics.

<p>A map of the studied area illustrating locations, sampling sites, stratigraphic and structural characteristics.</p

Selected major and trace element concentrations, 87Sr/86Sr ratios and physicochemical parameters of bulk samples of weathering profile PG in the study area.

<p>Selected major and trace element concentrations, 87Sr/86Sr ratios and physicochemical parameters of bulk samples of weathering profile PG in the study area.</p

Distributions of selected major elements and changes of several relevant physicochemical parameters along with the vertical sampling depth.

<p>Distributions of selected major elements and changes of several relevant physicochemical parameters along with the vertical sampling depth.</p

Schematic representation of studied weathering profiles showing the sectional structure and sampling depth.

<p>Schematic representation of studied weathering profiles showing the sectional structure and sampling depth.</p

PAAS (Post–Archean Australian Shale) normalized REE distribution patterns of profiles XY and PG.

<p>PAAS (Post–Archean Australian Shale) normalized REE distribution patterns of profiles XY and PG.</p

Relationships between ⁸⁷Sr/⁸⁶Sr and Rb/Sr ratios.

<p>(A) Weathering profiles in the studied area. (B) cited profiles in Guizhou province. (Data of profiles PB were derived from Ji and Wang [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0191780#pone.0191780.ref093" target="_blank">93</a>]; data of profiles QZ–I, QZ–II, QZ–III and BY are from Liu et al. [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0191780#pone.0191780.ref062" target="_blank">62</a>]).</p

Global paleogeographic reconstruction in the Permian and the Late Triassic.

<p>NC: North China, SC: South China (after Scotese and Ziegler [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0191780#pone.0191780.ref096" target="_blank">96</a>]).</p

Selected major and trace element concentrations, ⁸⁷Sr/⁸⁶Sr ratios and physicochemical parameters of bulk samples of weathering profile XY in the study area.

<p>Selected major and trace element concentrations, ⁸⁷Sr/⁸⁶Sr ratios and physicochemical parameters of bulk samples of weathering profile XY in the study area.</p