Context Navigation

Version 14 (modified by halleb3@…, 4 years ago)
--

Chemical Analysis Object

Associated with one subsample (and therefore also to one sample).

More information on chemical analyses can be found here.

SUBSAMPLE: 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).

POINT: 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.

MINERAL: 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.

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.

ANALYST: 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:

PRECISION

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.

COMMENT: 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.