Thin continuous laminated bedding-parallel quartz veins (BPVs) with slip-striated and fibred vein walls occur within slates, or at their contact with sandstones, on the limbs of chevron folds in the Bendigc-Castlemaine goldfields, southeastern Australia. Two microstructural Types of BPV (I and II) have been previously recognized, and are confirmed in this study. Both types are concluded to have formed during and/or after crenulation cleavage (the first tectonic axial planar structure) in the wallrock slates, and during flexural-slip folding. Type I BPVs consist of syntaxial phyllosilicate inclusion trails, parallel to bedding, enclosing inclined inclusion bands, the latter formed by detachment of wallrock phyllosilicate particles from the walls of pressure solution-segmented discordant tension veins. Type I BPVs are formed by bedding-parallel shear, and grow in width by propagation of the discordant veins into the BPV walls. Type II veins are composed of quartz bands separated by wallrock slate seams which have split away from the vein wall during dilatant shear opening. They incorporate numerous torn-apart fragments of crenulated wallrock slate. Type I BPV inclusion band average spacing of 0.5 mm probably represents the magnitude of slip increments during stick-slip flexural-slip folding activity

NICHOLAS, A. R & MCLELLAND, S. J. Hydrodynamics of a floodplain recirculation zone investigated by field monitoring and numerical simulation

ALEXANDER, J., FIELDING, C. R. & POCOCK, G. D. Floodplain behaviour of the Burdekin River, tropical north Oueensland, Australia

WALLING, D. E. Using fallout radionuclides in investigations of contemporary overbank sedimentation on the floodplains of British rivers

VAN DER PERK, M., BURROUGH, P. A., CULLING, A. S. C., LAPTEV, G. V., PRISTER, B., SANSONE, U. VOITESKHOVITCH, O. V. Source and fate of Chernobyl-derived radiocaesium on floodplains in Ukraine

GOMEZ, B., EDEN, D. N., HICKS, D. M, TRUSTRAUM, N. A., PEACOCK, D. H. & WILMSHURST, J. Contribution of floodplain sequestration to the sediment budget of the Waipaoa River, New Zealand

Flow and Transport Through Unsaturated Fractured Rock: An Overview D.D. Evans, T. C. Rasmussen, and T. J. Nicholson

Numerical Modeling of Isothermal and Nonisothermal Flow in Unsaturated Fractured Rock: A Review K. Pruess and J. S. Y. Wang

Dynamic Channeling of Flow and Transport in Saturated and Unsaturated Heterogeneous Media Chin-Fu Tsang, Yvonne W. Tsang, Jens Birkholzer, and Luis Moreno  

Pressure Wave vs. Tracer Velocities Through Unsaturated Fractured Rock Todd C. Rasmussen

The Bolivian Sub-Andean Zone (SAZ) corresponds to a Neogene thrust system that affects an about 10-km thick Palaeozoic to Neogene siliciclastic succession. The analysis of macro and microstructures and cement distribution in thrust fault zones shows that they are sealed by quartz at depths >
3 km, due to local silica transfer by pressure-solution/precipitation activated at temperatures >70–90
C. At shallower depths, faults have remained open and could be preferential drains for lateral flow of carbonate-bearing fluids, as shown by the occurrence of carbonate cements in fractures and their host-sandstone. Due to decreasing burial, resulting from foothill erosion during fault activity, critically buried fault segments can be affected by nonquartz-sealed structures that post-date initial quartz-sealed structures. The integration of textural, fluid inclusion and isotopic data shows that carbonates precipitated at shallow depth ( < 3 km), low temperature ( < 80
C) and relatively late during the thrusting history. Isotopic data also show that precipitation occurred from the mixing of gravity-driven meteoric water with deeper formation water bearing carbonate carbon derived from the maturation of hydrocarbon source rocks (Silurian and Devonian shales). The combined microstructural and isotopic analyses indicate that: (i) fluid flow in fault zones often occurred with successive pulses derived from different or evolving sources and probably related to episodic fault activity, and (ii) at a largescale, the faults have a low transverse permeability and they separate thrust sheets with different fluid histories.