- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
East Africa
-
Kenya
-
Mount Kenya (1)
-
-
-
-
Antarctica (2)
-
Central America
-
Nicaragua (1)
-
-
Cerro Negro (1)
-
Columbia Hills (2)
-
East Pacific Ocean Islands
-
Hawaii (1)
-
-
Europe
-
Alps
-
French Alps (1)
-
Western Alps (1)
-
-
Western Europe
-
France
-
French Alps (1)
-
-
-
-
Oceania
-
Polynesia
-
Hawaii (1)
-
-
-
Southern Highlands (1)
-
United States
-
Hawaii (1)
-
-
-
commodities
-
brines (1)
-
-
elements, isotopes
-
isotopes (1)
-
metals
-
aluminum (1)
-
iron (1)
-
manganese (1)
-
-
silicon (1)
-
sulfur (3)
-
-
geochronology methods
-
paleomagnetism (2)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
Pleistocene
-
lower Pleistocene
-
Olduvai Subchron (1)
-
-
Matuyama Chron (1)
-
upper Pleistocene
-
Weichselian
-
upper Weichselian
-
Allerod (1)
-
Bolling (1)
-
Younger Dryas (1)
-
-
-
-
-
upper Quaternary
-
Brunhes Chron (1)
-
-
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Oligocene (1)
-
-
-
-
Precambrian
-
Hadean (2)
-
upper Precambrian
-
Proterozoic (1)
-
-
-
-
igneous rocks
-
igneous rocks
-
picrite (1)
-
volcanic rocks
-
basalts
-
tholeiite (1)
-
-
pyroclastics (1)
-
-
-
-
metamorphic rocks
-
metamorphic rocks
-
impactites
-
impact breccia (2)
-
-
-
-
meteorites
-
meteorites
-
stony meteorites
-
achondrites
-
Martian meteorites
-
SNC Meteorites
-
nakhlite (1)
-
shergottite (1)
-
-
-
-
-
Yamato Meteorites (1)
-
-
-
minerals
-
carbonates (1)
-
halides
-
chlorides (1)
-
-
hydrates (2)
-
oxides
-
hydroxides
-
iron hydroxides (1)
-
-
manganese oxides (1)
-
-
silicates
-
framework silicates
-
zeolite group (1)
-
-
sheet silicates
-
chlorite group (1)
-
clay minerals
-
nontronite (1)
-
smectite (1)
-
-
serpentine group
-
serpentine (1)
-
-
-
-
sulfates
-
gypsum (1)
-
-
sulfides (1)
-
-
Primary terms
-
Africa
-
East Africa
-
Kenya
-
Mount Kenya (1)
-
-
-
-
Antarctica (2)
-
atmosphere (1)
-
brines (1)
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
Pleistocene
-
lower Pleistocene
-
Olduvai Subchron (1)
-
-
Matuyama Chron (1)
-
upper Pleistocene
-
Weichselian
-
upper Weichselian
-
Allerod (1)
-
Bolling (1)
-
Younger Dryas (1)
-
-
-
-
-
upper Quaternary
-
Brunhes Chron (1)
-
-
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Oligocene (1)
-
-
-
-
Central America
-
Nicaragua (1)
-
-
clay mineralogy (2)
-
climate change (2)
-
core (1)
-
data processing (1)
-
diagenesis (2)
-
Earth (1)
-
East Pacific Ocean Islands
-
Hawaii (1)
-
-
Europe
-
Alps
-
French Alps (1)
-
Western Alps (1)
-
-
Western Europe
-
France
-
French Alps (1)
-
-
-
-
faults (3)
-
geochemistry (1)
-
geomorphology (6)
-
geophysical methods (1)
-
igneous rocks
-
picrite (1)
-
volcanic rocks
-
basalts
-
tholeiite (1)
-
-
pyroclastics (1)
-
-
-
intrusions (1)
-
isotopes (1)
-
lava (1)
-
magmas (1)
-
mantle (1)
-
metals
-
aluminum (1)
-
iron (1)
-
manganese (1)
-
-
metamorphic rocks
-
impactites
-
impact breccia (2)
-
-
-
metasomatism (3)
-
meteorites
-
stony meteorites
-
achondrites
-
Martian meteorites
-
SNC Meteorites
-
nakhlite (1)
-
shergottite (1)
-
-
-
-
-
Yamato Meteorites (1)
-
-
Moon (1)
-
Oceania
-
Polynesia
-
Hawaii (1)
-
-
-
paleoclimatology (4)
-
paleogeography (1)
-
paleomagnetism (2)
-
plate tectonics (1)
-
Precambrian
-
Hadean (2)
-
upper Precambrian
-
Proterozoic (1)
-
-
-
remote sensing (1)
-
sedimentary rocks
-
clastic rocks
-
sandstone (1)
-
-
-
sediments
-
clastic sediments
-
boulders (1)
-
dust (1)
-
outwash (1)
-
pebbles (1)
-
sand (1)
-
silt (1)
-
-
-
silicon (1)
-
soils (1)
-
sulfur (3)
-
tectonics (2)
-
United States
-
Hawaii (1)
-
-
weathering (6)
-
-
sedimentary rocks
-
sedimentary rocks
-
clastic rocks
-
sandstone (1)
-
-
-
volcaniclastics (1)
-
-
sedimentary structures
-
channels (2)
-
-
sediments
-
sediments
-
clastic sediments
-
boulders (1)
-
dust (1)
-
outwash (1)
-
pebbles (1)
-
sand (1)
-
silt (1)
-
-
-
volcaniclastics (1)
-
-
soils
-
paleosols (2)
-
soils (1)
-
Noachian
A fragile record of fleeting water on Mars
Results from the first geologic traverse on the topographic rim of a complex impact crater, Endeavour Crater, Mars
Paleoenvironmental Archives in Rock Rinds and Sand/Silt Coatings
Deposition of >3.7 Ga clay-rich strata of the Mawrth Vallis Group, Mars, in lacustrine, alluvial, and aeolian environments
Rover observations in Gusev Crater: Evidence for a style of weathering unique to Mars?
Extensive Noachian fluvial systems in Arabia Terra: Implications for early Martian climate
Insights into surface runoff on early Mars from paleolake basin morphology and stratigraphy
High concentrations of manganese and sulfur in deposits on Murray Ridge, Endeavour Crater, Mars
Equatorial layered deposits in Arabia Terra, Mars: Facies and process variability
PERSPECTIVE
Paleosols and paleoenvironments of early Mars
Evidence for a Noachian-aged ephemeral lake in Gusev crater, Mars
An episodic slab-rollback model for the origin of the Tharsis rise on Mars: Implications for initiation of local plate subduction and final unification of a kinematically linked global plate-tectonic network on Earth
CO 2 solubility in primitive martian basalts similar to Yamato 980459, the effect of composition on CO 2 solubility of basalts, and the evolution of the martian atmosphere
Cerro Negro volcano, Nicaragua: An assessment of geological and potential biological systems on early Mars
Sulfate-rich mineral deposits have been discovered in many locations on Mars through observations by orbiters, landers, and roving spacecraft. It appears that in most cases, these minerals are produced by acid-sulfate weathering of igneous rocks, which may have been a widespread process for the first billion years on Mars. The origin of life on Earth may have occurred in iron-sulfur hydrothermal settings, and early Mars likely had similar environmental conditions. An excellent terrestrial analog for acid-sulfate weathering of Mars-like basalts exists at Cerro Negro, Nicaragua, where acidic sulfur-bearing gases interact with recently erupted basaltic ash in numerous active fumaroles. We investigated the chemistry and mineralogy of the pristine basalts and their chemically weathered products, and we studied the associated microbiological communities as an analog for potential early life on Mars. Measured pH values of condensed volcanic vapors range from −1 to 5, and near-surface temperatures in the fumaroles range from 40 to 400 °C. In a few years, fresh basalt can weather to amorphous silica and gypsum, along with lesser amounts of other sulfates (natroalunite and jarosite), Fe-hydroxides, and clays. Altered rocks have up to 35 wt% SO 3 equivalent, similar to the amounts of sulfur reported for Meridiani Planum bedrocks and inferred in other sulfate-bearing bedrock on Mars. Heavily weathered rocks have silica contents up to 80 wt%, similar to silica-rich soils at Gusev crater that possibly formed in hydrothermal environments. Here, we provide preliminary results of our studies and outline the logistics for a field excursion to this Mars analog system.