Mineralogic composition of cryogenic evaporites determined by low-temperature X-ray diffactometry

Summary

Abstract: 

As part of a collaborative investigation between researchers at Rice University, Arkansas State University, University of Rochester, and Ohio State University, lakes of the McMurdo Dry Valleys were sampled at discreet depth intervals during the 2005-2006 field season.  Sample splits were subsequently analyzed for chemical and isotopic composition of both gases and dissolved  ions, as well as dissolved organic carbon. In addition, cryogenic salts were sampled in the surrounding lake shores in order to determine the salt sources. Gravity cores were also obtained and in the case of Lake Vanda, a white precipitate was recovered from the lake bottom.  
          
Presented  in this file is the mineralogic composition of salt crusts that were collected on the surface of sediment and rocks surrounding the lakes, as well as the lake-bottom precipitate from Lake Vanda.  The results are based on low-temperature XRD determinations, and Rietveld refinement of whole peaks.
            

Date Range: 

Wednesday, December 21, 2005 to Tuesday, December 27, 2005

...or query the data clicking the:

Variables: 

DATASET_CODE
  • Label:
  • Definition: Table Identifier
  • Type: Nominal
  • Missing values: None specified
LOCATION_NAME
  • Label: Location Name
  • Definition: Name of lake where measurement was made
  • Type: Nominal
  • Missing values: None specified
Location_Type
  • Label:
  • Definition: Sample type description and/or location
  • Type: Nominal
  • Missing values: None specified
Sample_ID
  • Label:
  • Definition: Sample identification code
  • Type: Nominal
  • Missing values: None specified
Latitude
  • Label:
  • Definition: Sample Latitude
  • Type: Physical quantity
  • Unit: degree
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • Null = None given
Longitude
  • Label:
  • Definition: Sample Longitude
  • Type: Physical quantity
  • Unit: degree
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • Null = None given
Date_time
  • Label:
  • Definition: Date sample was collected
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values: None specified
Halite
  • Label:
  • Definition: Percent composition of halite
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given
Antarcticite
  • Label:
  • Definition: Percent composition of Antarcticite
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given
Thenardite
  • Label:
  • Definition: Percent composition of Thenardite
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given
Mirabilite
  • Label:
  • Definition: Percent composition of Mirabilite
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given
Gypsum
  • Label:
  • Definition: Percent composition of Gypsum
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given
Calcite
  • Label:
  • Definition: Percent composition of Calcite
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given
Aragonite
  • Label:
  • Definition: Percent composition of Aragonite
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given
Quartz
  • Label:
  • Definition: Percent composition of Quartz
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given
Albite
  • Label:
  • Definition: Percent composition of Albite
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • NULL = None given

DOI: 

10.6073/pasta/72e6d378488670471e477a79d73c10d2

Short name: 

snyder_salts

Data set ID: 

6003
People

Owner/Creator: 

Contact: 

Additional Project roles: 

Data Manager
Data Manager