Micro-Raman spectroscopy of fluid inclusions in a hopper crystal in halite

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5658813

Higgins, K L; Stein, C L

Raman microscopy has been used successfully to analyze for dissolved sulfate in fluid inclusions in naturally occurring halite. Hopper crystals are crystals of halite (NaCl) whose structure is produced by crystal growth at the surface of a brine reservoir. Brine is trapped by defects in the growing crystal faces as microscopic fluid inclusions. In this study the hopper crystal was characterized by obtaining a profile of the sulfate (SO/sub 4//sup 2 -/) concentrations in brine inclusions in the bands formed in the hopper crystal structure. In addition, the same sample contained large areas of clear recrystallized halite in which fluid inclusions are not as abundant as those in hopper crystals but are several orders of magnitude larger (frequently several mm on an edge). These larger inclusions were also analyzed for their sulfate content. The sample for this study came from a thick halite unit in the Salado Formation (Permian age) in the Delaware Basin, southeastern New Mexico. The Waste Isolation Pilot Plant (WIPP) is located at a depth of approximately 2150 feet from the surface.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5658813
• Report Number(s): SAND-86-0237C; CONF-860829-5; ON: DE86007628
• Country of Publication: United States
• Language: English

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FEDERAL REGION VI
GEOLOGIC DEPOSITS
INCLUSIONS
LASER SPECTROSCOPY
MANAGEMENT
MICROANALYSIS
NEW MEXICO
NORTH AMERICA
OXYGEN COMPOUNDS
RADIOACTIVE WASTE DISPOSAL
RAMAN SPECTROSCOPY
SALT DEPOSITS
SPECTROSCOPY
SULFATES
SULFUR COMPOUNDS
USA
WASTE DISPOSAL
WASTE MANAGEMENT