School of Earth and Environment

Gabriella Alodia Gabriella Alodia

Postgraduate Researcher

Email address: eega@leeds.ac.uk
Room: 101b 1

Affiliation: Institute of Applied Geoscience

Biography

I am a PhD student in the Institute of Applied Geosciences under the supervision of Chris Green, Andrew McCaig, and Douglas Paton. My research involves marine magnetic and gravity as well as bathymetry to observe the different types of spreading in the Mid-Atlantic Ridge. Such technique will be used to identify if the key features resulting from the different types of spreading (e.g. Oceanic Core Complexes) are also in place in the ocean-continent transition.

In general, I have big interest in marine geophysical data acquisition and processing. My experiences in acoustic wave-based instruments ranging from full coverage multi-beam bathymetry, side scan sonar, sub-bottom profiler (shallow seismic), and current/wave profiler (ADCP/AWAC). I am expecting to have experiences in potential field-based instruments such as magnetometer and gravimeter in the coming years as a PhD student.

During the 2016/2017 period I was in charge of the Science and Technology cluster of the Indonesian Scholars Forum (ISF) and have been an active member ever since. The community aims to connect Indonesian students and academia who reside in the UK to exchange knowledge and discuss relevant national issues. In 2018 I was then enstrusted to be the Chairperson of the 18th Indonesian Scholars International Convention (ISIC), which is annual event of the Indonesian Students Association in the UK.

Qualifications

2013 - 2015: MSc. in Marine Geophysics (Université de Bretagne Occidentale, France)

2008 - 2012: BSc. in Geodesy and Geomatics (Institut Teknologi Bandung, Indonesia)

  • Undergraduate Thesis: Numerical Modelling of Hydrodynamics and Evidence of Cay Erosion in Seribu Islands

Memberships/Fellowships

I am a student member of:

  • Society of Exploration Geophysics
  • American Geophysical Union

Research Interests

My primary interest is marine geophysical data acquistion and processing, which leads to Earth structure modelling in the oceanic crust. I have also developed an interest in how potential field data can be used to observe plate tectonics in a larger scale.

Teaching Interests

MSc. Modules in School of Earth and Environment:

BSc. Modules in School of Earth and Environment:

  • SOEE1150: Fundamentals of Geophysics
  • SOEE1160: Computers and Programming in Geosciences
  • SOEE2096: Advanced Fieldwork, Mapwork, and Study Skills
  • SOEE2631: Introduction to Geophysics
  • SOEE3470: Plate Tectonics & Geodynamics

Project details

Project title

Gravity and magnetic signatures of different modes of seafloor spreading in the Atlantic: Characterisation of ocean-continent transitions

Supervisors

Dr Chris Green, Dr Andrew McCaig, and Prof Douglas Paton

Funding

The project is fully funded by the Indonesian Endowment Fund for Education (LPDP). It also involves some data and software from Getech, plc.

Start date

1 October 2016

Project outline

Background

The nature of the mid-oceanic ridge spreading has been studied in various ridges with different spreading velocities. Speci fically, the growing discovery of detachment faults in the near ridge axis environment, especi ally in the Mid-Atlantic Ridge (MAR) has postulated questions related to the origin and evolution of these faults as their geometry is not quite similar to the normal faults that are typically found in both marine and continental areas. These faults are marked by so-called Oceanic Core Complex (OCC) which expose rocks that originate from the lower-crust to the upper-mantle layers to the sea oor. Formerly, OCCs were conceived to only be formed in the inside corner of Fracture Zones (FZ), in which the dip direction is perpendicular to the spreading axis. The hypothesis is then followed by the discovery of abundant OCCs away from the spreading axis. These discoveries then raised even more questions about the physical properties and environment in which detachment faults could develop.

The study in the spreading axis is carried out to understand the mechanism before observing the margins, where oceanic core complexes might be in place but buried by the sedimentation from the continental crust. The sedimentary architecture and onlap relationship itself plays an important role to assess the risks associated with the thermal regime and hydrocarbon maturity in petroleum exploration. Hence, the identification of the different types of spreading will be followed by sub-surface modelling and inversion of the shipborne magnetic and gravity signatures in the study area.

Aim

This study aims to establish a sub-surface model of sedimentary architecture and onlap relationships in the continental margins based on the understanding of the processes that happened in the spreading ridge.

Publications

Conference Talks

Alodia, G., Adhiwijna, D., Yusuf, M. 2017. The Reliability of GEBCO_2014 Model for Oceanic Basin Interpretation Purposes in Sunda Trench and Sangihe Arc. The 1st International Conference on Maritime Sciences and Advanced Technology (MSAT) in Bali, Indonesia.

Alodia, G., Green, C., McCaig, A., Paton, D., Campbell, S. 2017. The Use of Magnetic Signatures in Identifying Oceanic Core Complexes in the Mid-Atlantic Ridge. BGA Postgraduate Research in Progress 2017 in Aberdeen, UK.

Conference Poster

Alodia, G., Green, C., McCaig, A., Paton, D., Campbell, S. 2017. Gravity and Magnetic Signatures of Different Types of Spreading at the Mid-Atlantic Ridge. AGU Fall Meeting 2017 in New Orleans, LA, USA.