Local fracture criteria : Lengthscales and applications

1998 ◽  
Vol 08 (PR8) ◽  
pp. Pr8-349-Pr8-356 ◽  
Author(s):  
T. Siegmund ◽  
W. Brocks
Keyword(s):  
Fracture Criteria ◽  
Local Fracture

Fracture in human cortical bone: local fracture criteria and toughening mechanisms

2005 ◽  
Vol 38 (7) ◽  
pp. 1517-1525 ◽  
Author(s):  
R.K. Nalla ◽  
J.S. Stölken ◽  
J.H. Kinney ◽  
R.O. Ritchie
Keyword(s):  
Cortical Bone ◽  
Fracture Criteria ◽  
Local Fracture ◽  
Toughening Mechanisms ◽  
Human Cortical Bone

scholarly journals Chemical and stable isotope composition of surface and groundwater in the surroundings of the Los Humeros Caldera, Puebla, Mexico

2019 ◽  
Vol 98 ◽  
pp. 07013
Author(s):  
Thomas Kretzschmar ◽  
Matteo Lelli ◽  
Ruth Alfaro ◽  
Juan Ignacio Sanchez ◽  
Yann Rene Ramos
Keyword(s):  
Stable Isotope ◽  
Isotope Composition ◽  
Regression Line ◽  
Sustainable Use ◽  
Geothermal Reservoir ◽  
Maximum Temperature ◽  
Stable Isotope Composition ◽  
Local Fracture ◽  
Hydrogeological Model ◽  
Fracture Systems

It is important to develop a regional hydrogeological model to identify possible recharge and discharge areas for a sustainable use of a geothermal reservoir. The Los Humeros geothermal area is situated within five surficial watersheds and coveres an area of more than 15.000 km2. A total of 208 well and spring samples were collected between June 2017 and November 2018. The stable isotope data for this region define a regression line of δDH2O = 8.032·δ18O + 12 and indicate that groundwater is recharged by regional precipitation. At least 39 groundwater wells, with a maximum temperature of 35 °C, show temperatures above the reported mean average surface temperature of 15 °C. Characteristic elements for geothermal reservoir fluids (B, Li, As) are also present in these groundwaters, indicating a possible connection between the reservoir fluid and the local groundwater through local fracture systems. Concentration of B in these hot wells is between 150 and 35000 ppb.

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