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Splice Mode


There are two ways to construct a spliced data record using Splicer:
  1. Splice--> CONSTRAINED Tool for building spliced data records. Preserves the Composite Depth Scale (mcd) position of every core. This is the preferred tool for building spliced data records.
  2. SPLICE --> UNCONSTRAINED: (Deferred) Tool for building spliced data records. Permits the splice depth scale to differ from the Composite Depth Scale. Useful in difficult recovery or disturbed core situations.

      Constrained

      The SPLICE --> CONSTRAINED tool is used to build a complete spliced record after the multiple-hole core data have been depth-shifted and stratigraphically aligned. "CONSTRAINED" means that the spliced record will ALWAYS preserve the composite depth scale which is displayed in the left-hand Composite panel. This is the preferred tool for building spliced data records.

      This SPLICE Splice Window manages the core selection and splicing. This process occurs in two stages:

      1. Grabbing
      2. Splicing

      Grabbing

      With the center mouse button, set a Reference Point,

      using the middle mouse button, on the core you want to grab.

      Then Press the

      Grab Button

      to move the selected core to the splicer window.

      If it is the first core to be moved, it will now be the first core of the . the core is redrawn in the left column of the right-hand panel.

      The user then selects a second core - again by first setting a Reference Point, at a point where the new core overlaps with and can be spliced below the first core. Then by pressing the

      Grab Button,

      you can move that core to the Grab Track.

      Splicing Your Grab

      Once you have completed your grab, you will now have two tracks on the screen, the Composite Track and the Grab Track.

      Next press and hold the middle mouse button somewhere in the overlap of the two tracks.

      While holding down the middle mouse button you will see a tie line:

      , and a cross plot


      that is changing as you move the mouse.

      Slide the mouse back and forth until you have a well defined cross-correlation in the Cross Correaltion Window.

      When you are done, simple release the middle mouse button. You will then be asked if you want to complete this splice.

      If you answer yes, the portion of the grab track below the splice point is put into the corresponding portion of the composite track. (This will overwrite the bottom portion of the composite track.)

      You will also now see a Splice Preview Window,

      that shows you the result of your splice.

      Undo a Splice

      Don't like this splice? You can undo it by using the
      Undo Last Splice
      button.

      Unconstrained (Deferred)

      The SPLICE --> UNCONSTRAINED tool is used to build a complete spliced record after the multiple-hole core data have been depth-shifted and stratigraphically aligned. "UNCONSTRAINED" means that the spliced record will NOT NECESSARILY preserve the composite depth scale which is displayed in the left-hand Composite panel. This tool is useful in difficult recovery or disturbed core situations.

      This SPLICE pop-up window also allows the user to select the first core to begin splicing: The user clicks on any core with the center mouse button, hits the GRAB CORE button, and the core is redrawn in the left column of the right-hand panel. The user then selects a second core - the one which overlaps with and can be spliced below the first core - and it is drawn on the right column of the right window.

      The user then uses the center mouse button to place a red dot on a correlative feature on the left-most core in the Splice panel. Using the right mouse button, the user defines the position of that same feature in the rightmost core in the splice panel. A splice tieline is drawn (not necessarily a perfectly horizontal tieline). Examining the cross-correlation plot, the user can either drag the appropriate mouse button over the core data, or use the up/down arrows to find the best splice tiepoint between the two cores.

      When the tiepoint is satisfactory the user then hits the SPLICE TO TIE button and the program splices the two core records at that point (trims the bottom off the left core and trims the top off the right core).

      The results can be stored in a SPLICE TABLE which defines the ODP identifier, mbsf, and mcd tiepoint data to rebuild the spliced record.

      NOTE: Because the splice is not constrained to be horizontal the spliced depth scale can differ appreciably from the Composite depth scale (mcd).

      ____

      updated: July 21, 2006


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