ProcessMenu Help


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Splicer PROCESS Menu Options:

The PROCESS Menu accesses the two main Splicer tools.

1) COMPOSITE: Tool for depth-shifting core data to align stratigraphic features and develop the Composite Depth Scale.

2a) SPLICE --> CONSTRAINED: Tool for building spliced data records. Preserves the Composite Depth Scale (mcd) position of every core. The preferred tool for building spliced data records.

2b) SPLICE --> UNCONSTRAINED: 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.

3) DATA --> Process/reprocess data by culling, smoothing and decimating.

------- COMPOSITE -------

The COMPOSITE tool (under the PROCESS menu) is used to depth-shift core data in one hole relative to core data in other holes.

The COMPOSITE tool allows users to optimally intercorrelate core data from multiple holes so that all stratigraphic features recovered at a given site are aligned with the same features at other sites, producing a new depth scale which is formally termed the Composite Depth Scale, with depth units of mcd (meters composite depth).

------- SPLICE --> 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 pop-up window 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 clicks any place where the two cores overlap (with the center mouse button) and a horizontal tieline is drawn, and the cross-correlation between the two cores at that point of overlap is shown. The user can drag (mouse button depressed) over the interval to find the best point to define the splice.

The program indicates a good splice position by flashing "This is a good splice" when the cross-correlation is centered and the difference between the tie point data values is less than 10% of the splice value. If the tiepoint is satisfactory then the user 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.

------- SPLICE --> UNCONSTRAINED -------

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).

------- Data ----------

Process/reprocess data by smoothing, culling and decimating.

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updated: 30 April, 1996
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