|Version 14 (modified by halleb3@…, 4 years ago)|
Chemical Analysis Object
More information on chemical analyses can be found here.
- SAMPLE NUMBER
- Must correlate to existing sample in database. (Upload help)
- Must correlate to existing subsample of the given sample number. If a subsample has not yet been created, you may create one here, but you must provide a subsample type (see below).
- The analysis number. It should be unique to the subsample to allow differentiation between different points for a particular subsample. It should be an integer.
- This must be in agreement with minerals or mineral modes listed as present for the sample. If the analysis is a bulk/whole rock analysis, this field should read bulk rock.
- Method of analysis, i.e. EMP, LA-ICPMS, SIMS, etc.
- SUBSAMPLE TYPE – required to create subsamples at bulk upload
- In order to create a subsample during bulk upload of chemical analysis, you must specify a type for the new subsample. Subsample types accepted: Thin section, Polished thin section, Rock Chip, or Mineral separate. Subsample type only needs to be specified for the first chemical analysis for a particular subsample in a list. For example, if you have 5 garnet analyses on a new polished thin section that you want to upload, you only need to enter “polished thin section” in the subsample type column for the first (topmost) analysis.
- ANALYTICAL FACILITY
- The analytical facility where analysis was performed. This can be the name of an institution or department.
- ANALYSIS DATE
- Must be a date in MM-DD-YYYY, YYYY-MM-DD or any shortened version (i.e. YYYY, or, YYYY-MM). Notes on entering dates for upload to MetPedDB.
- The name of the person who analyzed the sample. Preferred format: Lastname, First initial.
- REFERENCE IMAGE
- The filename of image on which the analysis location is referenced. The goal here is to allow the user to easily find an image showing the context of a chemical analysis, so please be sure to upload the reference image.
- X REFERENCE
- The x coordinate location of the analysis on the reference image, measured in percent of total image width (in original orientaion). The origin is assumed to be at bottom left of image.
- Y REFERENCE
- The y coordinate location of the analysis on the reference image, measured in percent of total image height (in original orientaion). The origin is assumed to be at bottom left of image.
- X STAGE
- The stage X-coordinate recorded by a microscope or microprobe. These are in microns.
- Y STAGE
- The stage Y-coordinate recorded by a microscope or microprobe. These are in microns.
- ELEMENTS/SPECIES – at least one required
- Headers should be different elements/species (e.g. CaO, SiO2, Mg).
- UNITS – must be in second row and in proper format, (e.g. wt%, ppm)
- Non numerical values can be used to indicate information about an analysis as in the table below:
Values for Elements/Species can be numeric or these abbreviations:
- n.d. = not determined
- [blank] = not determined
- n.a. = not determined (literally not analyzed)
- - = not determined
- b.d. = below detection
- b.d.l. = below detection limit
- < [a value] = less than the specified value
- Uncertainty of measurement (relative or absolute).
- Precision is entered for EACH SPECIFIC ELEMENT/SPECIES VALUE in the column directly to the right of the element/species. PRECISION VALUES WILL NOT APPLY TO ALL ELEMENTS/SPECIES, ONLY PRECEDING COLUMN.
- UNITS – must be in second row and in proper format, including –abs or -rel for absolute vs. relative.
- WEIGHT PERCENT TOTAL
- The total weight percent of measured elements/species for this point. This indicates the completeness of the analysis to a user.
- REFERENCE – Note: required for published data
- Data that are published require a reference to the publication. MetPetDB uses the GeoRef assension number (the same as NAVDAT), which can be found from a GeoRef search.
- There may be any number of comment columns. You can input any type of description of the analytical strategy. RE: Bulk Upload For organization purposes, it is probably best to put separate types of information in separate comment columns, rather than strung together in a single comment. The key to using the comment field is to put in information that will describe the analysis, and will help others find it in a search.