Confidentiality Policies and Procedures of the Reference Departments in Texas Academic Libraries.
Libraries are commonly viewed as "sanctuaries of ideas," and librarians are seen as the guardians of ideas and of the records the library and its users generate.1 Librarians are also viewed as researchers of reference questions and topics. As fa cilitators of research and keepers of rec ords, they have access to certain information about the users of the li brary?information that may be consid ered private. Lin owes and Hoyman note that librarians create records and collect
Privacy and Library 2.0: How Do They Conflict?
Library 2.0 has a great potential to provide customized services to patrons. However some librarians are concerned that the information needed to provide these services may have a detrimental effect on privacy. How are librarians dealing with this potential conflict?
Redistribution of rare-earth elements during diagenesis of carbonate rocks from the Mid-Proterozoic Newland Formation, Montana, U.S.A.
Abstract REE data for carbonate rocks from the Mid-Proterozoic Newland Formation, Belt Supergroup, show variable degrees of relative REE enrichment when normalized to a composite shale of the Newland Formation. Most conspicuous are relative enrichments in LREE's and positive Eu anomalies. Possible coprecipitation of REE's in carbonates from seawater is much too small to account for the REE enrichment, thus only diagenetic REE enrichment has to be considered. By far the strongest LREE enrichment is observed in carbonates with interbedded shales. During diagenesis REE apparently moved from the shale partings to the adjacent limestone beds. Massive limestone units have considerably smaller REE enrichments (except in proximity to shales), suggesting that REE addition from formation waters is less efficient for supplying REE's than is local redistribution between shale and limestone beds. Early precipitation of diagenetic silica in pore spaces reduces REE enrichment in limestone beds by reducing their permeability. Dolostones are cemented by pervasive early-diagenetic silica and lack significant REE enrichment except for Eu, probably because silica cement prohibited access of REE-bearing pore waters. Positive Eu anomalies indicate reduction of Eu to the divalent state during diagenesis and relatively large mobility of divalent Eu.