Fractures, Fluid Flow and Mineralization (Geological Society by Ken McCaffrey, Lidia Lonergan, Jamie Wilkinson

By Ken McCaffrey, Lidia Lonergan, Jamie Wilkinson

Hydrothermal mineralization is generally structurally managed so you will need to comprehend the position of faulting and fracturing in improving rock permeability and facilitating fluid circulate and mass move. this is often the most subject matter of this interdisciplinary quantity and the papers integrated are meant to supply an outline of present principles on the interfaces of structural geology, fluid circulate and mineralization study. the amount comprises a few speculative yet provocative principles which may still stimulate a re-assessment of current innovations relating to fluid move in fracture platforms and the genesis of hydrothermal mineral deposits. It additionally highlights fresh advances which express the significance of the advance of fracture connectivity in focusing fluid circulation. the amount concludes with a thematic set of papers proposing new examine effects at the genesis of the realm recognized Carboniferous base steel deposits of eire. This quantity is meant for geoscientists learning the movement of fluids via fault, vein and fracture platforms or the genesis of mineral deposits and may be of curiosity mostly to these eager about the minerals and in academia.

Also available:

The Initiation, Propagation, And Arrests of Joints And different Fractures - ISBN 1862391653
knowing the Micro to Macro Behaviour of Rock - Fluid platforms (No. 249) - ISBN 1862391866

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Additional resources for Fractures, Fluid Flow and Mineralization (Geological Society Special Publication)

Example text

An essential feature of the model is that the fibre orientation, and hence the opening direction, rotates anticlockwise with time from 160 to 071°. Figure 8 shows the typical vein patterns which develop at four stages within this rotational sequence. The stages are defined on the basis of fibre orientations: stage 1, 160-127°; stage 2, 126-114°; stage 3, 113-101°; stage 4, 100-071°. Sector A veins develop first as Mode I extensional fracture fills with fibres subnormal to the vein walls (Fig. 8; stage 1).

No correction was made for sample line Cumulative frequency of vein thickness plot obliquity when real data were plotted because True vein thicknesses are plotted v. their cumu- the obliquity has no effect on curve shape. lative frequencies on log-log axes, each point A straight line, as shown by the fractal powerrepresenting the number of veins of thickness law model, indicates fractal clustering and greater than the thickness value (Fig. 3aiii-diii; the absolute value of the slope, Ds, is the fracKruhl 1994; Sanderson et al.

10. (continued}. often at the expense of vein length. e. length, width and height. For these reasons the majority of data compiled on the V3 system concerns only length and width. The data set has both inner and outer cut-offs (Mandelbrot 1983), where veins are too small to be visible to the naked eye and where length exceeds outcrop scale, respectively. 01-100m range and widths lie between 1 and 100mm. Where width varies along the length of the vein the maximum width is measured. It should be emphasized that interpretations of the V3 data set refer specifically to the scales at which the data were collected.

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