Project Details
Projekt
Radium Isotopes as Indicators of Pump Test Induced Changes in Fluid Composition; Fluid Age Dating by Means of 81Kr, 39Ar, 37Ar and 85Kr During the Long-Term Pumping Test 2002/2003 at the KTB Pilot Hole
Applicant
Dr. Lorenz Eichinger
Subject Area
Mineralogy, Petrology and Geochemistry
Term
from 2003 to 2004
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 5400622
In this study the fluid dynamics and their hydraulically induced changes will be investigated by measurement of the radium isotopes 226Ra, 228Ra, 224Ra, 223Ra and the radioactive noble gas isotopes 39Ar, 37Ar, 85Kr and 81Kr during the pumping test at the continental deep drilling pilot hole (KTB-VB). The objective of the study is to derive information on the provenance and flow paths of the exploited fluids from radium isotope ratios. In addition changes in fluid rock interaction in the host rock can be concluded from the radium isotope ratio determinations. The measurement of the argon isotopes 39Ar and 37Ar provide information on the production rates and on the release and transfer processes of subsurface produced radionuclides (like 36Cl, 129l, 14C, 4He, 3He) from the rock into the pore water. An age dating of the exploited fluids will be performed by means of the long-lived krypton isotope 81Kr. Our investigations form an optimal supplement to other geochemical and hydraulic investigations planned at the KTB-VB. Far-reaching conclusions about fluid dynamics can be expected from the synthesis of the results.
DFG Programme
Infrastructure Priority Programmes
