@article{c639756b4d684a53ae320a834d913af8,
title = "Authigenesis of amphibole and its relationship to the diagenetic evolution of lower cretaceous sandstones of the Potiguar rift basin, northeastern Brazil",
abstract = "Authigenic amphibole occurs in the fan-delta-front arkoses and lithic sandstones of the Neocomian Pend{\^e}ncia Formation in the Potiguar rift basin, northeastern Brazil as overgrowths, fracture-healing and replacement of detrital amphibole. The amphibole, which is closely associated with diagenetic albite, chlorite and sphene, has precipitated from K-Na-Cl brines enriched in Ti-Fe-Mg, at temperatures ≤100°C. These ions were derived from the diagenetic alteration of detrital amphibole and pyroxene, chloritization of volcaniclastic sediments at the base of the formation, and from brines that ascended along faults from the underlying basement.",
author = "{De Ros}, {Luiz Fernando} and Anjos, {Sylvia M.C.} and S. Morad",
note = "Funding Information: We thank PETROBRAS for supplying the samples, petrographic data, formation-water analyses, and for the permission to publish this paper. We are grateful to Mr. Hans Harryson for aiding with the microprobe analyses, to Dr. Henrik Skogby for discussions on amphibole formula calculation, and to J.F. Hubert, M.J. Hole and K.A.W. Crook for their suggestions and comments on the manuscript. S. Morad wishes to thank the Swedish Natural Science Research Council (NFR) for financial support to this research, and L.F. De Ros acknowledges Brazil Research Council (CNPq) scholarship grant no. 200465/92-9.",
year = "1994",
month = jan,
doi = "10.1016/0037-0738(94)90065-5",
language = "British English",
volume = "88",
pages = "253--266",
journal = "Sedimentary Geology",
issn = "0037-0738",
publisher = "Elsevier B.V.",
number = "3-4",
}