TY  - JOUR
A1  - Stern, Libby
A1  - Blisniuk, Peter Michael
T1  - Stable isotope composition of precipitation across the southern Patagonian Andes
Y1  - 2002
ER  - 
TY  - JOUR
A1  - Blisniuk, Peter Michael
A1  - Sonder, L. J.
A1  - Lillie, R. J.
T1  - Foreland normal fault control on northwest Himalayan thrust front development
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Hilley, G. E.
A1  - Blisniuk, Peter Michael
A1  - Strecker, Manfred
T1  - Mechanics and erosion of basement-cored uplift provinces
N2  - Basement-cored uplift provinces are often characterized by high-angle reverse faulting along preexisting crustal heterogeneities, which may greatly affect the mechanics of deformation and the coupling between erosion and orogenic structure. Herein we construct a coupled deformation-erosion model to understand the mechanics and erosion of mountain belts in which the spatial distribution of deformation is largely influenced by the presence of preexisting high-angle faults. In this case, deformation is accommodated along, and topography is built above, these structures. This topographic loading leads to increasing lithostatic stresses beneath these regions. As a result, active deformation may migrate to frictionally stronger structures in adjacent regions where lithostatic loading is lower. The migration of deformation to such nearby structures depends on the Hubbert-Rubey pore fluid pressure ratio of the crust (lambda), the orientations of the frictionally weaker and stronger preexisting faults (beta(1) and beta(2), respectively), the friction coefficients (mu(b1) and mu(b2)) and Hubbert-Rubey fluid-pressure ratios (lambda(b1) and lambda(b2)) of these faults, and the surface slope of the topography above the frictionally weaker structure (alpha), assuming zero surface slope above the frictionally stronger structure. In general, we found that for a given alpha and beta(1), as mu(b1) increases lambda=lambda(b1)=lambda(b2) increases, and beta(2) decreases, the value of mu(b2) required to force deformation to migrate increases. However, as erosional processes lead to decreasing surface slopes, deformation will be inhibited from migrating to frictionally stronger structures in adjacent regions. Our model results may help to explain some aspects of the deformation observed and the possible correlation between precipitation and the migration of deformation within these tectonic provinces
Y1  - 2005
ER  - 
TY  - JOUR
A1  - Bergner, Andreas G. N.
A1  - Strecker, Manfred
A1  - Trauth, Martin H.
A1  - Deino, Alan L.
A1  - Gasse, Francoise
A1  - Blisniuk, Peter Michael
A1  - Duehnforth, Miriam
T1  - Tectonic and climatic control on evolution of rift lakes in the Central Kenya Rift, East Africa
N2  - The long-term histories of the neighboring Nakuru-Elmenteita and Naivasha lake basins in the Central Kenya Rift illustrate the relative importance of tectonic versus climatic effects on rift-lake evolution and the formation of disparate sedimentary environments. Although modem climate conditions in the Central Kenya Rift are very similar for these basins, hydrology and hydrochemistry of present-day lakes Nakuru, Elmenteita and Naivasha contrast dramatically due to tectonically controlled differences in basin geometries, catchment size, and fluvial processes. In this study, we use eighteen C-14 and Ar-40/Ar-39 dated fluvio-lacustrine sedimentary sections to unravel the spatiotemporal evolution of the lake basins in response to tectonic and climatic influences. We reconstruct paleoclimatic and ecological trends recorded in these basins based on fossil diatom assemblages and geologic field mapping. Our study shows a tendency towards increasing alkalinity and shrinkage of water bodies in both lake basins during the last million years. Ongoing volcano-tectonic segmentation of the lake basins, as well as reorganization of upstream drainage networks have led to contrasting hydrologic regimes with adjacent alkaline and freshwater conditions. During extreme wet periods in the past, such as during the early Holocene climate optimum, lake levels were high and all basins evolved toward freshwater systems. During drier periods some of these lakes revert back to alkaline conditions, while others maintain freshwater characteristics. Our results have important implications for the use and interpretation of lake sediment as climate archives in tectonically active regions and emphasize the need to deconvolve lacustrine records with respect to tectonics versus climatic forcing mechanisms.
Y1  - 2009
UR  - http://www.sciencedirect.com/science/journal/02773791
U6  - https://doi.org/10.1016/j.quascirev.2009.07.008
SN  - 0277-3791
ER  -