Extended Data Fig. 1: Field relationships in outcrop.
From: Instantaneous rock transformations in the deep crust driven by reactive fluid flow
a, The investigated soapstone reaction selvage around a central fracture in serpentinite. The fracture now contains mostly talc together with minor magnesite and dolomite. The red-brown color of the soapstone is caused by a thin (~2 mm) weathering layer. b, Composite image showing details of sample locations along the sampling traverse with respect to the fracture and soapstone–serpentinite reaction interface. Note that this image is not to scale due to distortion effects. Distances between samples and the fracture and reaction front have been measured in the field. The location of the least altered serpentinite sample Lin_31 is outside the image, 2.4 m from the reaction front on the left hand side. The picture was taken during fieldwork 2013 and kindly provided by Harrison Lisabeth.
