Browsing ELibrary by Subject "ZONATION"

Now showing items 1-4 of 4

CAPTURE ZONE, TRAVEL TIME, AND SOLUTE-TRANSPORT PREDICTIONS USING INVERSE MODELING AND DIFFERENT GEOLOGICAL MODELS

Harrar W.G.; Sonnenborg T.O.; Henriksen H.J. (2003)

Six regional-scale flow models are compared to gain insight into how different representations of hydraulic-conductivity distributions affect model calibration and predictions. Deterministic geological models were used to ...
DEGREE OF PRESERVATION OF IGNEOUS ZONATION IN ZIRCON AS A SIGNPOST FOR CONCORDANCY IN U/PB GEOCHRONOLOGY

Connelly J.N. (2001)

Zircon crystallized from felsic magmas typically (if not ubiquitously) develop compositional growth zonation that is easily imaged by cathodoluminescence (CL). This zonation represents inherently unstable chemical gradients ...
SOLVING THE PRODUCTION-DIFFUSION EQUATION FOR FINITE DIFFUSION DOMAINS OF VARIOUS SHAPES - PART II. APPLICATION TO CASES WITH α-EJECTION AND NONHOMOGENEOUS DISTRIBUTION OF THE SOURCE

Meesters A.G.C.A.; Dunai T.J. (2002)

In this paper, numerical methods derived in Part I (Chem. Geol. (2002)) are expanded to accommodate the effects of α-emission and zonation of U and Th as relevant for (U-Th)/He thermochronology. Expressions for the required ...
TH/U ZONATION IN ZIRCON DERIVED FROM EVAPORATION ANALYSIS: A MODEL AND ITS IMPLICATIONS

Klotzli U.S. (1999)

Zircon evaporation analyses often exhibit the existence of spatial extraneous variations in 208Pb/206Pb compared to 207Pb/206Pb as revealed by increasing evaporation temperature and duration of analysis. As 208Pb solely ...

Browsing ELibrary by Subject "ZONATION"

Browsing ELibrary by Subject "ZONATION"

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