Navigation Links
Ancient geologic escape hatches mistaken for tube worms

Tubeworms have been around for millions of years and the fossil record is rich with their distinctive imprints. But a discovery made by U of C scientists found that what previous researchers had labeled as tubeworms in a formation near Denver, Colorado, are actually 70 million-year-old escape hatches for methane.

Tubeworms, or siboglinids, look like long lipstick tubes and have been observed in warm and cold environments on the ocean floor, as well as in whale carcasses and decomposing organic-rich cargoes in sunken ships. Ecosystems teeming with tubeworm colonies were discovered at hydrothermal vents in the Galapagos Ridge in 1977 and at cold seeps at the base of the Florida Escarpment in 1984. As a result of these modern sightings, a number of fossil examples of tubeworms were subsequently identified in the rock record. One of these localities, found south of Denver, Colorado, was recently re-examined by U of C scientists.

In an area approximately one and a half times the size of the City of Calgary, scientists discovered that what was previously identified as fossilized tubeworms were actually fossilized tubular escape hatches for methane, a major constituent of natural gas.

"It is the first time that evidence of a natural ancient geologic conduit system has been discovered where gas, water and solids were all being vented at once," says Federico Krause, the lead author of the paper which is co-authored by Selim Sayegh, an adjunct professor in geoscience, Jesse Clark, a former undergraduate student, and Renee Perez, research associate in the Department of Chemical and Petroleum Engineering. The paper is published in this month's edition of Palaios.

The discovery was made possible thanks to the Stable Isotope Laboratory of the Department of Physics and Astronomy and the electronic microprobe housed in the Department of Geoscience. Stable isotopes and chemical elements maps demonstrated that not only methane gas bubbles were being expelled but that solid particles that had adhered to the bubbles were also being ejected from the fossil vents.

Although the results may be surprising, the ramifications are even more so.

The fact that methane gas can escape from a thick shale seafloor may demonstrate that there needs to be more research done on the integrity of geologic seals in petroleum reservoirs earmarked for CO2 injection," says Krause who is a professor in the Department of Geoscience at the University of Calgary. "It shows that under different geologic circumstances gases that are present in underground formations can indeed seep out, and all the effort expended in trying to remove CO2 from our atmosphere would be lost."

In addition, there are vast volumes of methane gas naturally trapped beneath the seafloor in the form of gas hydrates. If these hydrates were to be destabilized, methane bubbles could release large quantities of microparticles to the ocean bottom. This release would cloud up the deep ocean and the effect would be akin to fouling up the atmosphere with a dense smog. Given that the ocean bottom is one of the last frontiers of petroleum exploration, further research will be needed to properly plan for the location of production and containment facilities on the seafloor. Installation of these facilities has the potential to destabilize underlying hydrates.

"These 70-million-year-old tubular escape hatches south of Denver, Colorado, provide a glimpse to processes that are occurring in the ocean bottoms at present," says Krause. "While finding tubeworms would have been satisfying, uncovering tubular gas vents has been much more exciting."


Contact: Leanne Yohemas
University of Calgary

Related biology news :

1. Mountain caribous ancient ancestry revealed
2. University of Leicester archaeologist uncovers evidence of ancient chemical warfare
3. Decline of carbon-dioxide-gobbling plankton coincided with ancient global cooling
4. Male crickets with bigger heads are better fighters, study reveals, echoing ancient Chinese text
5. Ancient African exodus mostly involved men, geneticists find
6. Ancient magma superpiles may have shaped the continents
7. Dry spells spelled trouble in ancient China
8. 6,000km trip to reveal clues to ancient migration
9. Genetic based human diseases are an ancient evolutionary legacy
10. Modern genetics vs. ancient frog-killing fungus
11. Ancient mother spawns new insight on reptile reproduction
Post Your Comments:
(Date:10/29/2015)... 29, 2015 NXTD ) ... focused on the growing mobile commerce market and ... StackCommerce, a leading marketplace to discover and buy ... smart wallet on StackSocial for this holiday season. ... the "Company"), a biometric authentication company focused on ...
(Date:10/27/2015)... , Oct. 27, 2015 In the present ... of concern for various industry verticals such as banking, ... to the growing demand for secure & simplified access ... ,sectors, such as hacking of bank accounts, misuse of ... equipment such as PC,s, laptops, and smartphones are expected ...
(Date:10/27/2015)... 27, 2015 Synaptics Inc. (NASDAQ: SYNA ), ... Google has adopted the Synaptics ® ClearPad ® ... power its newest flagship smartphones, the Nexus 5X by ... --> --> Synaptics works ... strategic collaboration in the joint development of next generation ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... 2015 /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ:  AEZS) (TSX: AEZ) ... of the Toronto Stock Exchange, confirms that as of ... corporate developments that would cause the recent movements in ... --> About Aeterna Zentaris Inc. ... Aeterna Zentaris is a specialty biopharmaceutical company engaged ...
(Date:11/24/2015)... ... ... The Academy of Model Aeronautics (AMA), led by its Executive Council, has ... Prix, to represent the First–Person View (FPV) racing community. , FPV racing has exploded ... of racing and several new model aviation pilots have joined the community because of ...
(Date:11/24/2015)... , Nov. 24, 2015 /PRNewswire/ - Aeterna Zentaris ... today that the remaining 11,000 post-share consolidation (or ... Warrants (the "Series B Warrants") subject to the ... on November 23, 2015, which will result in ... giving effect to the issuance of such shares, ...
(Date:11/24/2015)... ... November 24, 2015 , ... Creation Technologies would like to ... Deloitte's 2015 Technology Fast 500 list of the fastest growing companies in North ... II medical device that speeds up orthodontic tooth movement by as much as ...
Breaking Biology Technology: