selective replacement

selective replacement

[si′lek·tiv ri′plās·mənt]
(geology)
The replacement of one mineral by another, preferentially within an altered rock mass.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Skarn-related gold mineralization at Luna Roja appears to be associated with, breccia, veining and selective replacement of carbonate rocks on the upper limb and in the hinge-zone of a northwest trending, thrust-related, inclined antiform (see Figure 1).
It used the selective replacement of all the primary hydroxyl groups of [beta]-cyclodextrin by the reaction of iodine and triphenylphosphane in DMF.
The contract is for expansion and selective replacement of existing optical transport network based on CWDM and OTN in the entire coverage area of CiCiSalzburg AG.
The newer techniques also allow selective replacement of the diseased portions of the cornea rather than the entire cornea.
DMEK allows for selective replacement of diseased tissue, leaving the healthy portions of the cornea intact.
Likewise, a service-grade AR-15 can readily be brought up to minute-of-angle performance by selective replacement of key modular elements with match-grade parts.
Through modifications, technology upgrades, and selective replacement, it intends to keep this fleet throughout the foreseeable future, perhaps 50 years.
Likewise, a service-grade "standard" AR15 can readily be brought up to minute-of-angle performance by selective replacement of key modular elements with match-grade parts.
The economically most attractive and technically most useful deoxygenation is the selective replacement of all secondary hydroxyl functions with hydrogen yielding the corresponding [alpha],[omega]-diols HOC[H.sub.2][(C[H.sub.2]).sub.n]C[H.sub.2]OH.
It has, through selective replacement, helped to keep voids and abandonment to a minimum and prevented the spread of low demand.
Also included is re-pointing, cleaning, and repair of all limestone and brick masonry repair and selective replacement of gutters, flashing, slate, and copper on the distinctive mansard, dormers, and roof.
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