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Formation of Tourmaline-Rich Gem Pockets in Miarolitic Pegmatites.

Authors
London-D
Source
Am Mineral 1986 71:396-405
Link
NIOSHTIC No.
10011767
Abstract
This report compares fluid-inclusion data from pegmatites in San Diego, California, and Kulam, Afghanistan, to identify the conditions under which gem pockets form. Miarolitic and massive rare-element pegmatites were found to crystallize under similar pressure- temperature conditions (2400 to 2800 bars and 425 deg to 475 deg c), and may also be controlled by the activities of alkali borate melt components.
Publication Date
19860101
Document Type
IH; Final Contract Report;
Fiscal Year
1986
NTIS Accession No.
NTIS Price
Identifying No.
MIR 3-87
NIOSH Division
WO;
Source Name
Am. Mineral., V. 71, 1986, PP. 396-405
State
CA; OK;
Performing Organization
University of Oklahoma
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