Physical and Chemical Evaluations of Diamonds and Their     Mineral  Inclusions from Kimberlite in the Colorado-Wyoming State Line District
{'Code': '06030107', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'John L. Snyder'}
Diamonds in kimberlite apparently reflect physiochemical                        conditions associated with ancient mantle processes.  Chemistries               of diamond and of included mineral grains are indicative of                     crystallization environments (e.g. peridotitic vs. eclogitic                    affinity), and P-T equilibration values can be calculated from                  some of these data.  Parcels of diamonds from all but two                       recovery sites in the Colorado-Wyoming State Line Kimberlite                    District are available for study and a detailed physical and                    chemical evaluation is proposed.  The State Line diamonds                       constitute the largest and only known comprehensive assemblage of               diamonds in North America that represents an entire kimberlite                  field.  Determination of the major physical properties                          (particularly those related to resorption and deformational                     processes) of these diamonds will permit evaluation of growth                   environment(s) and changes that may have occurred during and/or                 after emplacement of host kimberlite.  Supporting information                   will be derived from diamond chemistry (trace elements and C                    isotopes) and chemistry of included minerals.  These data will be               utilized to assess diamond genesis models and petrologic models                 of the upper mantle under the southern Rocky Mountains.  Special                attentian will be directed toward the problem of a suggested                    relationship between eclogitic affinity diamonds and subducted                  oceanic crust.
{'FirstName': 'Malcolm', 'LastName': 'McCallum', 'EmailAddress': None, 'StartDate': '01/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Colorado State University', 'CityName': 'Fort Collins', 'ZipCode': '805232002', 'PhoneNumber': '9704916355', 'StreetAddress': '601 S Howes St', 'CountryName': 'United States', 'StateName': 'Colorado', 'StateCode': 'CO'}
{'Code': '1557', 'Text': 'VOLCANOLOGY & MANTLE GEOCHEMIS'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8817024.xml'}