Calcite-cemented concretions do not necessarily preserve unstable grains more readily than host sandstones. The main factors controlling the capability of concretions to preserve unstable framework grains seem to be (1) the types of unstable grains, (2) their susceptibility to dissolution by interstitial fluids or replacement by calcite, (3) burial depth and temperature during and after concretion development, and (4) time. Correct provenance reconstructions of sandstone units containing concretions must be preceded by assessment of any diagenetic alteration affecting the framework grains of both concretions and host rocks. -from Authors
Cibin U., Cavazza W., Fontana D., Milliken K.L., McBride E.F. (1993). Comparison of composition and texture of calcite-cemented concretions and host sandstones, Northern Apennines, Italy. JOURNAL OF SEDIMENTARY PETROLOGY, 63(5), 945-954 [10.1306/D4267C4E-2B26-11D7-8648000102C1865D].
Comparison of composition and texture of calcite-cemented concretions and host sandstones, Northern Apennines, Italy
Cavazza W.
Secondo
Membro del Collaboration Group
;
1993
Abstract
Calcite-cemented concretions do not necessarily preserve unstable grains more readily than host sandstones. The main factors controlling the capability of concretions to preserve unstable framework grains seem to be (1) the types of unstable grains, (2) their susceptibility to dissolution by interstitial fluids or replacement by calcite, (3) burial depth and temperature during and after concretion development, and (4) time. Correct provenance reconstructions of sandstone units containing concretions must be preceded by assessment of any diagenetic alteration affecting the framework grains of both concretions and host rocks. -from AuthorsI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
