Related Experiment Video
Updated: Oct 10, 2025
08:12
Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA
Published on: May 16, 2016
15.7K
Gas origin linked to paleo BSR
Iván de la Cruz Vargas-Cordero1, Lucia Villar-Muñoz2, Umberta Tinivella3
1Istituto Nazionale di Oceanografia e di Geofisica Sperimentale-OGS, Borgo Grotta 42C, Trieste, Italy.
Scientific Reports
|December 15, 2021
Summary
Investigating gas hydrate systems in Central-South Chile reveals high concentrations linked to fluid migration. This study models past conditions to understand the gas origin, differentiating between climate-driven dissociation and deeper geological sources.
Area of Science:
- Geophysics
- Marine Geology
- Geochemistry
Background:
- The Central-South Chile margin is tectonically active, experiencing uplift and seismic events.
- Understanding the dynamics of gas hydrate and free gas systems is crucial for this region.
- Previous studies have not fully elucidated the gas hydrate/free gas system's behavior since the last deglaciation.
Purpose of the Study:
- To evaluate gas hydrate and free gas concentrations along a seismic line in Central-South Chile.
- To derive geothermal gradients and model past Bottom Simulating Reflector (BSR) positions.
- To determine the origin of gas within the hydrate system.
Main Methods:
- Geophysical data analysis
- Geothermal gradient modeling
- Paleo-BSR (Bottom Simulating Reflector) modeling
- Seismic interpretation
Main Results:
- High concentrations of gas hydrates and free gas were identified.
- Local geothermal gradient anomalies were observed, associated with fluid migration via faults and mud volcanoes.
- Analysis of BSR, free gas base, and paleo-BSR suggests potential gas origins.
Conclusions:
- The study provides a basis for evaluating gas origins by comparing free gas base depths with paleo-BSR.
- Gas presence may be linked to gas hydrate dissociation from climate change and geological evolution.
- Deeper gas supply is indicated only if the free gas base is deeper than the paleo-BSR.
More Related Videos
Related Concept Videos
01:07Speciation Rates
21.7K
Overview
21.7K
02:56The Fossil Record
26.1K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
26.1K
02:35What is Evolutionary History?
40.7K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
40.7K
01:21Isothermal Processes
4.1K
A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
4.1K
01:20Sulfur Assimilation
119
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
119
01:50Global Climate Change
24.9K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.9K