Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Deep Sea Microbial Ecology

Deep Sea Microbial Ecology

The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches...

Microbial Mats

Microbial Mats

Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...

Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

The Soil Ecosystem

The Soil Ecosystem

Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:

The Bone Matrix

The Bone Matrix

Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in...

Shape and Texture of Coarse Aggregate

Shape and Texture of Coarse Aggregate

Aggregate shape is classified based on the relative sharpness or roundness of the edges and corners. This classification includes categories like rounded, angular, elongated, and flaky, each with specific characteristics. Rounded aggregates, fully shaped by attrition, are typical of river or seashore gravel, while angular aggregates, such as crushed rock, have well-defined edges. Aggregates that are elongated and flaky are less desirable, as they can reduce the workability and strength of...

Search research articles

Home
Magmatic And Amagmatic Seafloor Generation At The Ultraslow-spreading Gakkel Ridge, Arctic Ocean

Home
Magmatic And Amagmatic Seafloor Generation At The Ultraslow-spreading Gakkel Ridge, Arctic Ocean

Related Experiment Video

Calcium Carbonate Formation in the Presence of Biopolymeric Additives

Calcium Carbonate Formation in the Presence of Biopolymeric Additives

Published on: May 14, 2019

Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean

P J Michael¹, C H Langmuir, H J B Dick

¹Department of Geosciences, The University of Tulsa, 600 College Avenue, Tulsa, Oklahoma 74104, USA. pjm@utulsa.edu

|June 27, 2003

View abstract on PubMed

Summary

This summary is machine-generated.

The Gakkel Ridge exhibits irregular volcanism and abundant hydrothermal activity, challenging predictions for slow-spreading mid-ocean ridges. Mantle processes, not just spreading rate, control magmatic segmentation and hydrothermal systems.

More Related Videos

High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus

High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus

Published on: April 3, 2018

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

Published on: August 7, 2017

Related Experiment Videos

Calcium Carbonate Formation in the Presence of Biopolymeric Additives

Calcium Carbonate Formation in the Presence of Biopolymeric Additives

Published on: May 14, 2019

High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus

High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus

Published on: April 3, 2018

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

Published on: August 7, 2017

Area of Science:

Geology
Oceanography
Geophysics

Background:

The Gakkel Ridge is the slowest-spreading segment of the global mid-ocean ridge system.
Previous predictions suggested diminishing magmatism and rare hydrothermal activity with decreasing spreading rates.

Purpose of the Study:

To conduct a high-resolution mapping and sampling study of the Gakkel Ridge.
To investigate the relationship between spreading rate, magmatism, and hydrothermal activity.

Main Methods:

International ice-breaker expedition to the high Arctic and North Pole in summer 2001.
High-resolution mapping and sampling of the Gakkel Ridge.

Main Results:

Observed irregular magmatic variations and abundant hydrothermal activity, contrary to predictions.

Identified a 300-km central amagmatic zone between continuous western volcanism and eastern volcanic centers.

Demonstrated that mantle melting extent is not solely dependent on spreading rate, suggesting variations in mantle temperature or chemistry.

Conclusions:

Mantle processes, including melting and melt segregation, significantly control ridge segmentation.
Focused magmatic activity and faulting likely drive the high levels of hydrothermal activity observed.