SEMINAR: MGG Student Seminar

["kenri pomar" <kpomar@rsmas.miami.edu>]

MGG student seminar
Cimas Conference Room
April 27th, 2010 @12.00pm


Yulaika Hernawati

Abstract :
The Relationship between Facies Distribution and Fracture in Oligo-Miocene
Carbonate Rock

The Rajamandala Formation has been known as the well-outcropped
Oligo-Miocene carbonates in West Java, Indonesia. The uplifting occurred
during Plio-Pleistocene exposed Rajamandala Limestone with very intensive
fractures. The study of the relationship between the distribution of
fractures and facies within this carbonates will help the reservoir
simulation of carbonate rocks.
Detailed outcrop study was done using one-dimensional scan line method
within different carbonate facies in different locations. The
parameters measured were the length, the spacing, and the aperture of
fractures. The fractures were characterized into extensional fracture,
shear fracture, and stylolite. The data
analyses revealed that the intensity of fractures (Extension Fracture and
Stylolite) were higher within the Framestone facies compared to the
Rudstone-Floatsone facies. The most significant pattern observed is that
the intensity of stylolite in framestone is higher than in the
rudstone-floatstone facies.


Qiong Zhang

Abstract :
Relative Earthquake Location Technique: How do the locations of events
change using
source-specific station terms method ?

     The simplest and most widely applied approach to implement relative
location is
using station term technique. Puerto Rico is a region with complicated
tectonics and dense seismicity, however no accurate faulting parameters are
available. Using the Comploc Package, developed to apply the SSST method to
solve for local earthquake locations using phase data, we relocate 21,241
events recorded by the Puerto Rico Seismic Network (PRSN) between 1986 and
2009. Station terms are obtained by smoothing the residuals from nearby
events
using Delaunay tessellation of the seismicity. The iteration is done until a
stable set of locations and station terms are achieved. We expect that the
final locations exhibit much less scatter and have a tendency to align to
linear or planar features.


Kenri Pomar
Graduate student of MGG Dept - RSMAS
4600 Rickenbacker Causeway
Miami - FL , 33149


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