| Abstract: | The separation of silt-sized minerals by specific gravity is made possible by using a nontoxic, heavy liquid medium of sodium polytungstate and water. Once separated, the silt-sized heavy-mineral fraction is prepared for analysis with a scanning electron microscope equipped with an automatic image analyzer and energy-dispersive spectrometer. Particles within each sample are sized and sorted according to their chemistry, and the data are tabulated in histograms and tables. Where possible, the user can define the chemical categories to simulate distinct mineral groups. Polymorphs and minerals that have overlapping compositions are combined into a group and differentiated by X-ray diffraction. Hundreds of particles can be rapidly sized and classified by chemistry. The technique can be employed on sediments from any environment. |
| Genre: | USGS Numbered Series |
| ProdID: | 4060 |
| Citation Author: | Commeau, Judith A.; Poppe, Lawrence J.; Commeau, R. F. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | iii, 13 p. :ill. ;28 cm. |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey ;
U.S. G.P.O. [distributor], |
| Citation Series: | Circular |
| Citation Series Code: | CIR |
| Citation Series Number: | 1071 |
| Citation Search Results Text: | Separation and identification of the silt-sized heavy-mineral fraction in sediments; 1992; CIR; 1071; Commeau, Judith A.; Poppe, Lawrence J.; Commeau, R. F. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 1992 |
| Type: | citation/reference |
| Text: | Separation and identification of the silt-sized heavy-mineral fraction in sediments; 1992; CIR; 1071; Commeau, Judith A.; Poppe, Lawrence J.; Commeau, R. F. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/circ/1992/1071/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/circ/1992/1071/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey ;
U.S. G.P.O. [distributor], |
