scholarly journals Single grain noble gas analysis of Antarctic micrometeorites by stepwise heating method with a newly constructed miniature furnace

2011 ◽  
Vol 63 (10) ◽  
pp. 1097-1111 ◽  
Author(s):  
Ken-ichi Bajo ◽  
Tomohiro Akaida ◽  
Noriaki Ohashi ◽  
Takaaki Noguchi ◽  
Tomoki Nakamura ◽  
...  
Keyword(s):  
Noble Gas ◽  
Gas Analysis ◽  
Heating Method ◽  
Stepwise Heating ◽  
Stepwise Heating Method ◽  
Single Grain

scholarly journals A noble gas study of the Kobe (CK4) chondrite by a stepwise heating method.

2002 ◽  
Vol 36 (4) ◽  
pp. 341-353 ◽  
Author(s):  
Yoshiki Matsumoto ◽  
Takuya Matsumoto ◽  
Jun-ichi Matsuda ◽  
Noboru Nakamura
Keyword(s):  
Noble Gas ◽  
Heating Method ◽  
Stepwise Heating ◽  
Stepwise Heating Method

Further evidence for an impact origin of the Tsenkher structure in the Gobi-Altai, Mongolia: geology of a 3.7 km crater with a well-preserved ejecta blanket

2017 ◽  
Vol 156 (1) ◽  
pp. 1-24
Author(s):  
GORO KOMATSU ◽  
JENS ORMÖ ◽  
TOGOOKHUU BAYARAA ◽  
TOMOKO ARAI ◽  
KEISUKE NAGAO ◽  
...  
Keyword(s):  
Noble Gas ◽  
Gas Analysis ◽  
Volcanic Origin ◽  
Large Size ◽  
Deformation Features ◽  
Order Of Magnitude ◽  
Ejecta Blanket ◽  
Planar Deformation Features ◽  
Impact Origin ◽  
Related Sample

AbstractThe Tsenkher structure in the Gobi-Altai, Mongolia is a c. 3.7 km diameter crater with a well-preserved ejecta blanket. It has been hypothesized to be either of impact or volcanic origin in our previous work. Observations during our 2007 expedition and related sample analyses give further support for an impact origin. The evidence includes the presence of a structurally uplifted near-circular rim surrounded by an ejecta blanket, and abundant breccias, some of which are melt- and millimetre-scale spherule-bearing. Planar deformation features (PDFs) were found in one quartz grain in a breccia sample. Fe-rich grains are found in a vesicular melt sample that is also characterized by elevated platinum group element (PGE) abundances with respect to the sedimentary bedrock of the area (approximately an order of magnitude). Noble gas analysis of one breccia sample yielded an elevated 3He/4He value of (5.0±0.2) × 10−6. Although not conclusive alone, these geochemical results are consistent with a contribution of meteoritic components. A volcanic origin, in particular a maar formation, would require explanations for the unusual conditions associated with Tsenkher, including its large size occurring in isolation, the structurally uplifted rim and the lack of a bedded base surge deposit. A pronounced rampart structure observed at the eastern ejecta is also unusual for any volcanic origin. 40Ar–39Ar dating of a vesicular melt sample gives an age of the Tsenkher structure of 4.9±0.9 Ma. The rampart structure could provide insights into the formation of similar ejecta morphologies associated with numerous impact craters on Mars.

scholarly journals Multiscale Assessment of Caprock Integrity for Geologic Carbon Storage in the Pennsylvanian Farnsworth Unit, Texas, USA

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5824
Author(s):  
Natasha Trujillo ◽  
Dylan Rose-Coss ◽  
Jason E. Heath ◽  
Thomas A. Dewers ◽  
William Ampomah ◽  
...  
Keyword(s):  
Carbon Storage ◽  
Oil Recovery ◽  
Gamma Ray ◽  
Noble Gas ◽  
Mercury Porosimetry ◽  
Injection Pressure ◽  
Horizontal Stress ◽  
Gas Analysis ◽  
Water Flooding ◽  
Minimum Horizontal Stress

Leakage pathways through caprock lithologies for underground storage of CO2 and/or enhanced oil recovery (EOR) include intrusion into nano-pore mudstones, flow within fractures and faults, and larger-scale sedimentary heterogeneity (e.g., stacked channel deposits). To assess multiscale sealing integrity of the caprock system that overlies the Morrow B sandstone reservoir, Farnsworth Unit (FWU), Texas, USA, we combine pore-to-core observations, laboratory testing, well logging results, and noble gas analysis. A cluster analysis combining gamma ray, compressional slowness, and other logs was combined with caliper responses and triaxial rock mechanics testing to define eleven lithologic classes across the upper Morrow shale and Thirteen Finger limestone caprock units, with estimations of dynamic elastic moduli and fracture breakdown pressures (minimum horizontal stress gradients) for each class. Mercury porosimetry determinations of CO2 column heights in sealing formations yield values exceeding reservoir height. Noble gas profiles provide a “geologic time-integrated” assessment of fluid flow across the reservoir-caprock system, with Morrow B reservoir measurements consistent with decades-long EOR water-flooding, and upper Morrow shale and lower Thirteen Finger limestone values being consistent with long-term geohydrologic isolation. Together, these data suggest an excellent sealing capacity for the FWU and provide limits for injection pressure increases accompanying carbon storage activities.

scholarly journals Development of a Tritium Ingrowth and Dissolved Noble Gas Analysis Facility

2021 ◽  
Author(s):  
Karl Haase ◽  
Morgan Wallace ◽  
Gerolamo Casile ◽  
Tyler Coplen
Keyword(s):  
Noble Gas ◽  
Gas Analysis
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