Results 41 to 50 of about 7,837 (231)

Geologic quadrangle map no. 47 [PDF]

, 1978
Process Steps: 1. Either: a) a Portable Document Format (PDF) version of the map provided the Bureau of Economic Geology, University of Texas at Austin was converted from pdf to Tagged Image File Format (TIFF) or b) a paper map was scanned and saved in ...
Barnes, Virgil E. (Virgil Everett), 1903-1998
core   +1 more source

Cretaceous Limestone Dolomitization and Argument of Its Mg2+ Sources: Exampling the Bekhme and Qamchuqa Formations in the Zagros Collision Belt

Kurdistan Journal of Applied Research
This study unveils new considerations regarding the dolomitization of the Bekhme and Qamchuqa formations (BQFs), two reefal Cretaceous units in the Iraqi Zagros collisional belt.
Kamal Haji Karim , Sherzad Tofiq Mohamad
doaj   +1 more source

Fabric Preserving and Fabric Destroying Dolomitization: A case of Seawater Dolomitization

Sultan Qaboos University Journal for Science, 2006
This study is based on field, petrographic and geochemical investigations of Hajar Supergroup autochthonous rocks: Ruus Al Jibal Group- Musandam Peninsula, and Akhdar Group- Jebel Akhdar, Oman and U.A.E., and para-autochthonous Maqam Formation-Sumeini ...
Alham Jassim Al-Langawi
doaj   +1 more source

Survey of the diagenesis process and effect these process on reservoir quality of the Kangan formation in South Pars Field [PDF]

, 2009
Kangan and Upper Dalan formations are forming reservoir sequence of the South Pars field. Litology of the kangan formation is carbonate and (limestone and dolomite with anhydrite intervals), so digenetic processes were very active in this formation and ...
Ashkan Asadi Esksndar, Gholamreza Hosseinyar, Hossein Rahimpour-Bonab, Masoud Asgharian Rostami   +3 more
core   +1 more source

Genesis of Upper Triassic peritidal dolomites in the Transdanubian Range, Hungary [PDF]

, 2015
In the Late Triassic, a 2–3-km-thick platform carbonate succession formed along the passive margin of the Tethys Ocean. Certain parts of the succession were affected by pervasive dolomitization whereas other parts are only partially dolomitized or non ...
Budai, Tamás, Demény, Attila, Haas, János, Lukoczki, Georgina   +3 more
core   +1 more source

Raman Line Scan Analyses and a New Hypothesis for the Formation of Anatase‐Hosting Microbialites: Study of the Stromatolites From Saint‐Jean‐de‐la‐Rivière, Cotentin, France

Journal of Raman Spectroscopy, EarlyView.
Micrometer analysis of millimeter lines of Raman spectra concludes in the association of anatase and graphitized organic matter (graphogen). The photosynthetic microorganisms at the origin of the microbialites produce O2, which is transformed by TiO2 into reactive species that, in turn, decompose the organic matter of the microorganisms. ABSTRACT Raman
Marie‐Paule Bassez
wiley   +1 more source

A tale of two microbialites: Stromatolites and microbially induced sedimentary structures

Sedimentology, EarlyView.
ABSTRACT Microbialites are biosedimentary structures built by microbial mats. Five microbialite groups are distinguished: stromatolites, thrombolites, dendrolites, leiloites and microbially induced sedimentary structures (MISS). This contribution discusses the two most abundant microbialite groups in marine settings, stromatolites and MISS.
Nora Noffke, Stanley M. Awramik
wiley   +1 more source

Constraints on carbonate diagenetic fluid properties by microzone in situ analysis of carbon and oxygen isotopes: a case study of Cambrian-Ordovician, Tarim Basin

Shiyou shiyan dizhi, 2023
As an important technological measure to uncover complex sedimentary-diagenetic process, microzone in situ geochemical analysis has drawn more and more attention along with improving analytical and test levels.
Jun HAN, Donghua YOU, Yixiong QIAN, Shaofeng DONG, Shoutao PENG   +4 more
doaj   +1 more source

Calcium isotope (δ^44/40Ca ) variations of Neogene planktonic foraminifera [PDF]

, 2005
Measurements of the calcium isotopic composition (δ44/40Ca) of planktonic foraminifera from the western equatorial Pacific and the Indian sector of the Southern Ocean show variations of about 0.6‰ over the past 24 Myr.
Alexander Heuser, Anton Eisenhauer, Antretter, Antretter, Artemov, Arvidson, Berner, Billups, Birck, Bohaty, Böhm, Böhm, Coffin, Compston, De La Rocha, Diester-Haass, Eberli, Eisenhauer, Farrell, Fietzke, Florian Böhm, Flower, François, Frey, Gaillardet, Gibbs, Gussone, Gussone, Hansen, Hardie, Harris, Hastings, Hemleben, Heuser, Hippler, Hippler, Holland, Horita, Jacobson, Kennett, Kiessling, Klaus Wallmann, Lea, Lear, Lemarchand, Levitus, Lyle, Marriott, Morse, Nikolaus Gussone, Nägler, Opdyke, Paul N. Pearson, Paytan, Pearson, Pearson, Pearson, Pearson, Premoli Silva, Rosenthal, Rowley, Schmitt, Schmitt, Schmitt, Shevenell, Skulan, Soudry, Stanley, Sun, Sun, Thomas F. Nägler, Vance, Vigour, Wallmann, Warthmann, Whitehead, Wolf-Christian Dullo, Zachos, Zhu   +78 more
core   +2 more sources

Magnetotelluric Exploration of Zn Pb Mineralization in Stonepark, Irish Midlands

Geophysical Prospecting, Volume 74, Issue 4, May 2026.
ABSTRACT To meet the increasing demand for raw materials and to foster the energy transition, advances in exploration techniques are required that extend capabilities to deeper and/or more densely populated areas while having a low environmental and societal impact.
K. Tietze, A. Platz, O. Ritter, U. Weckmann, M. Holdstock, P. Rieger, V. Susin, A. Melo, K. Torremans, D. Kiyan   +9 more
wiley   +1 more source