A hybrid model of the CO 2 geochemical cycle and its application to large impact events

1986 ◽  
Vol 286 (5) ◽  
pp. 361-389 ◽  
Author(s):  
J. F. Kasting ◽  
S. M. Richardson ◽  
J. B. Pollack ◽  
O. B. Toon
Keyword(s):  
Hybrid Model ◽  
Large Impact ◽  
Geochemical Cycle ◽  
Impact Events

Northwest Africa 6486: Record of large impact events and fluid alteration on the L chondrite asteroid

2022 ◽  
Author(s):  
C. A. Lorenz ◽  
E. V. Korochantseva ◽  
M. A. Ivanova ◽  
J. Hopp ◽  
I. A. Franchi ◽  
...  
Keyword(s):  
Large Impact ◽  
Northwest Africa ◽  
Fluid Alteration ◽  
Impact Events

scholarly journals Geomorphology, Mineralogy, and Geochronology of Mare Basalts and Non-Mare Materials around the Lunar Crisium Basin

2021 ◽  
Vol 13 (23) ◽  
pp. 4828
Author(s):  
Xuejin Lu ◽  
Haijun Cao ◽  
Zongcheng Ling ◽  
Xiaohui Fu ◽  
Le Qiao ◽  
...  
Keyword(s):  
Large Impact ◽  
Small Scale ◽  
Lunar Exploration ◽  
Geological History ◽  
Major Phase ◽  
Western Area ◽  
Geological Map ◽  
Thin Crust ◽  
Impact Events ◽  
Mare Basalts

The Nectarian-aged Crisium basin exhibits an extremely thin crust and complicated lunar geological history. This large multi-ring impact basin is characterized by prolonged lunar volcanism ranging from the Imbrian age to the Eratosthenian period, forming the high-Ti mare unit, low-Ti mare basalts, and very low-Ti mare unit. We produced an updated geological map of the Crisium basin and defined four mare units (Im1: 3.74 Ga; Im2: 3.49 Ga; Im3: 3.56 Ga; EIm: 2.49 Ga) in terms of distinct composition and mineralogy. Olivine was widely determined in the Ti-rich Im1, implying the hybridization source in the lunar mantle with the occurrence of small-scale convective overturn. The major phase of low-Ti basaltic volcanism occurred c.a. 3.5 Ga, forming Im2 and Im3 in the western area. The youngest mare unit (EIm) has slight variations of pyroxene compositions, implying a decrease of calcic content of basaltic volcanisms with time. Later, distal material transports from large impact events in highlands could complicate the mixing of local mare basalts in the Copernicus age, especially the Im3 unit. The identified olivine-bearing outcrops and widely Mg-rich materials (Mg# > 70, where Mg# = molar 100 × Mg/(Mg + Fe)) in the western highlands, assumed to be the occurrence of the Mg-suite candidates, require future lunar exploration missions to validate.

Geoethical and Social Aspects of Warning for Low-Frequency and Large-Impact Events like Tsunamis

Geoethics ◽  
2015 ◽  
pp. 175-192 ◽  
Author(s):  
Stefano Tinti ◽  
Alberto Armigliato ◽  
Gianluca Pagnoni ◽  
Filippo Zaniboni
Keyword(s):  
Low Frequency ◽  
Large Impact ◽  
Social Aspects ◽  
Impact Events

A Hybrid Model for Teaching and Practicing Evidence-Based Practice

2007 ◽  
Vol 14 (1) ◽  
pp. 20-22 ◽  
Author(s):  
Shannon Hall-Mills ◽  
Kenn Apel
Keyword(s):  
Hybrid Model ◽  
Evidence Based Practice ◽  
Evidence Based
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