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REINTERPRETATION OF CL-36 DATA - PHYSICAL PROCESSES, HYDRAULIC INTERCONNECTIONS AND AGE ESTIMATES IN GROUNDWATER SYSTEMS - COMMENT

作     者:PHILLIPS, FM 

作者机构:Geoscience Department New Mexico Tech Socorro NM 87801 U.S.A. 

出 版 物:《APPLIED GEOCHEMISTRY》 (Appl. Geochem.)

年 卷 期:1993年第8卷第6期

页      面:643-647页

核心收录:

学科分类:0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

摘      要:MAZOR (1992) has reinterpreted several previous Cl-36 studies. The studies he revised used extensive physical hydrogeological data to aid in interpretation of the Cl-36 measurements. Major ion chemistry and other isotope tracers were considered in order to evaluate the groundwater geochemistry. The studies then used simple geochemical models to account for Cl behavior in the subsurface. The result of these Cl-36 dating studies was in reasonable agreement with both numerical models of the aquifer systems and with independent geochemical studies. MAZOR (1992) has reinterpreted these studies based on the assumption that spatial variations in chemical and isotope data should be attributed to unspecified discontinuities in the flow regime. The conceptual models of aquifer hydrodynamics resulting from this approach differ radically not only from the previous Cl-36 interpretations, but also from the findings of virtually all previous hydrogeological and geochemical investigations. Although Mazor s reinterpretations are provocative, he does not show how they explain the data of the numerous previous studies better than the conceptual models presented by the authors of those studies, nor has he demonstrated that his new models are consistent with the fundamental physical laws governing groundwater flow. Until this is satisfactorily accomplished I will continue to prefer the original Cl-36 interpretations.

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