Results 111 to 120 of about 34,613 (225)

Calcite Aragonite Problem: ABSTRACT [PDF]

AAPG Bulletin, 1964
The fundamental stability relations of calcite and aragonite are considered in the light of: (a) calorimetric data, (b) solubility measurements, (c) direct studies of phase changes. New data of Crawford and Fyfe suggest slightly lower pressures for aragonite formation than have been formerly proposed.
openaire   +1 more source

Synthesis of Aragonite from Precipitated Calcium Carbonate: A Pilot Scale Study

Indonesian Journal of Chemistry
The CO2 mineralization pathway is considered a promising option for carbon capture usage and storage because the captured CO2 can be permanently stored, and secondly industrial waste (i.e., petrochemical refinery, lime, and cement kiln dust) can be ...
Ellyta Sari, Reni Desmiarti, Zulhadjri Zulhadjri, Matlal Fajri Alif, Maulana Yusup Rosadi, Syukri Arief   +5 more
doaj   +1 more source

Identification of cave minerals by Raman spectroscopy: new technology for non-destructive analysis [PDF]

International Journal of Speleology, 2006
The usual tools are X-ray powder diffraction, the optical microscope, and the scanning electron microscope. X-ray diffraction gives a definitive fingerprint by which the mineral can be identified by comparison with a catalog of reference patterns ...
White William B.
doaj  

Analysis of CO₂ leakage through "low-permeability" faults from natural reservoirs in the Colorado Plateau, southern Utah [PDF]

, 2004
The numerous CO2 reservoirs in the Colorado Plateau region of the United States are natural analogues for potential geologic CO2 sequestration repositories.
Evans, J.P., Heath, J., Kirchner, D., Kolesar, P.T., Shipton, Z.K., Williams, A.P.   +5 more
core  

Fourier Optics in the Classroom

, 2018
Borrowing methods and formulas from Prof. Goodman's classic Introduction to Fourier Optics textbook [1], I have developed a software package [2] that has been used in both industrial research and classroom teaching [3]. This paper briefly describes a few
Mansuripur, Masud
core   +1 more source

Theoretical characterization of a model of aragonite crystal orientation in red abalone nacre

, 2009
Nacre, commonly known as mother-of-pearl, is a remarkable biomineral that in red abalone consists of layers of 400-nm thick aragonite crystalline tablets confined by organic matrix sheets, with the $(001)$ crystal axes of the aragonite tablets oriented ...
Chandler David, Currey J D, Ginzburg V L, Goldenfeld N, Lewin L, Lowenstam H A, Mann S, Metzler R A Zhou D Abrecht M Coppersmith S N Gilbert P U P A, P U P A Gilbert, R A Metzler, S N Coppersmith, Weiner S   +11 more
core   +1 more source

Reduced sediment accumulation rate enhances early marine diagenesis of periplatform sediments

The Depositional Record, Volume 12, Issue 2, April 2026.
The influence of reduced sediment accumulation rate on early marine burial diagenesis was investigated in sediments collected by ODP Leg 133. Results show that low sediment accumulation rates can produce substantial and asynchronous shifts in stable carbon isotope ratios across a slope transect without the development of sedimentological indicators of ...
Amanda M. Oehlert, Larry C. Peterson, Dick Kroon, Peter K. Swart   +3 more
wiley   +1 more source

Microchemical Analyses of Otoliths Reveal Habitat Differentiation Between a Sympatric Species Pair in the Coastal Waters of China

Ecology and Evolution, Volume 16, Issue 4, April 2026.
This study applied otolith morphology and microchemistry to analyze two sister fish species along the China coast. It revealed that B. sinensis from the contact zone migrates to low‐salinity estuaries to breed, whereas other groups reside permanently in high‐salinity waters, indicating ecological divergence.
Rongrong Zhang, Kay Lucek, Lisheng Wu, Shufang Liu, Wenwen Zhang, Hongjun Guo, Shaoxiong Ding   +6 more
wiley   +1 more source

The Effects of Carbonate Precipitation on the Physical Properties of Basalt

AGU Advances, Volume 7, Issue 2, April 2026.
Abstract To avoid the negative consequences of climate change, there is an urgent need to remove carbon dioxide from the atmosphere. Carbon mineralization—the conversion of injected CO2 into stable carbonate minerals—offers a promising pathway for large‐scale, permanent geologic storage. While projects such as CarbFix have demonstrated its feasibility,
Jonathan Simpson, Matěj Peč, Hoagy O’Ghaffari, Sharath Chandra Mahavadi, Jean E. Elkhoury   +4 more
wiley   +1 more source

Unravelling Marine Benthic Functioning Shifts Under Ocean Acidification

Ecology Letters, Volume 29, Issue 4, April 2026.
Ocean acidification is reshaping temperate shallow marine benthic communities and the way they function. Using community transplants at natural CO2 vents, we show that biodiversity loss under declining pH reduces biomass and calcification, while enhancing photosynthesis and nutrient uptake.
J. Carlot, S. Comeau, A. Chiarore, A. Mirasole, S. Alliouane, F. Micheli, C. L. Hurd, J.‐P. Gattuso, N. Teixidó   +8 more
wiley   +1 more source