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HELIOTHERMAL LAKE MODEL OF BORATE DEPOSITION IN THE MIOCENE FURNACE CREEK FORMATION, DEATH VALLEY REGION, CALIFORNIA.

By:
,
Edited by:
Grayson S.J.Smith D.A.

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Abstract

Heliothermal lakes are density-stratified with shallow submerged margins surrounding areally restricted deep pool(s) containing a dense brine overlain by a much less dense brine. The reflective brine interface allows solar energy to be trapped in the dense brine which may warm to over 90 degree C. Carbonate precipitated from the dense brine is the typical sediment produced in warm deep pool. Miocene borate deposits of the Death Valley region are typically contained within areally limited carbonate-rich pods that interfinger with a finely interlaminated (varve-like) mudstone and limestone. Primary borates there are predominately either Na-Ca borates or Ca-borates. This bimodal evaporite assemblage suggests that brine chemistries and (or) crystallization paths varied significantly in temporally and spatially related portions of this apparently continuous lacustrine deposit.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
HELIOTHERMAL LAKE MODEL OF BORATE DEPOSITION IN THE MIOCENE FURNACE CREEK FORMATION, DEATH VALLEY REGION, CALIFORNIA.
Year Published:
1988
Language:
English
Publisher:
Soc of Mining Engineers of AIME
Publisher location:
Littleton, CO, USA
Larger Work Title:
Preprint - Society of Mining Engineers of AIME
Number of Pages:
19
Conference Location:
Luxembourg, Luxemb
Conference Date:
2 October 1986 through 3 October 1986