36Cl: A TRACER IN GROUNDWATER IN THE AQUIA FORMATION OF SOUTHERN MARYLAND.

被引：0

作者：

Purdy, Caroline B. ^{[1
]}

Mignerey, Alice C. ^{[1
]}

Helz, George R. ^{[1
]}

Drummond, David D. ^{[1
]}

Kubik, Peter W. ^{[1
]}

Elmore, David ^{[1
]}

Hemmick, Thomas ^{[1
]}

机构：

[1] Univ of Maryland, College Park, MD,, USA, Univ of Maryland, College Park, MD, USA

来源：

Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | 1987年 / B29卷 / 1-2期

关键词：

AQUIFERS - Radioactivity - HYDROLOGY - RADIOACTIVE MATERIALS - Tracers;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The Aquia Formation (Paleocene) of Southern Maryland, a marine unit consisting predominantly of quartz sands, but containing 20-40% glauconite, represents one of the many productive, heavily pumped aquifers of the Southeastern Coastal Plain. An unusually high **3**6Cl activity (Approximately 15 x modern water) measured in an outcrop sample is interpreted as a result of the bomb pulse input. About 25 km downdip from the recharge area, a minimum in total chloride concentration occurs. This minimum is thought to correlate with the latest low-stand of sea-level, and thus to provide time information which is in general agreement with ages calculated from hydrodynamic data. However, significant increases in the **3**6Cl concentrations are observed along the flow path which may be due to ion filtration or to leakage of modern, bomb-contaminated water into the Aquia aquifer.

引用

页码：372 / 375