Results 51 to 60 of about 64,238 (294)

Timing of diagenesis and very low-grade metamorphism in the eastern sector of the Sierra de Cameros (Iberian Range, Spain): a U–Pb SHRIMP study on monazite [PDF]

, 2009
The Sierra de Cameros is an intracontinental orogen and represents the north-western part of the Iberian Range in Northern Spain. It comprises a thick sequence of syn-rift continental sediments (mainly sandstones and carbonates) deposited during ...
Aleinikoff, Bollinger, Cabella, Casas-Sainz, Casquet, Cherniak, Del Río, Evans, Evans, Frantz, Förster, Gabudianu Radulescu, Gil-Imaz, Goldberg, Janots, Janots, Kempe, Krenn, Lanzirotti, Lev, Mantilla-Figueroa, Mas, Masuda, Mata, Mata, Mata, Milodowski, Montel, Pan, Pan, Parrish, Rasmussen, Rasmussen, Rasmussen, Rubatto, Sawka, Smith, Spear, Tera, Tischer, Wilby, Williams, Wing   +42 more
core   +2 more sources

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

Microfacies Analysis and Depositional Environment of Middle Jurassic Samana Suk Formation, Chichali Nala Section, Surghar Range, Pakistan.

International Journal of Economic and Environment Geology, 2021
The Middle Jurassic age Samana Suk Formation, exposed in Chichali Nala section of Surghar ranges has been investigated by field work, petrographic study and XRD analysis to understand the microfacies, depositional environment and fault related ...
Imran Ahmad, Said Mukhtar Ahmad, Matee Ullah, Aurangzeb ., Syed Muhammad Waseem Sajjad, NAzir Ul Islam
doaj   +1 more source

Detecting Compaction Disequilibrium with Anisotropy of Magnetic Susceptibility [PDF]

, 2006
In clay-rich sediment, microstructures and macrostructures influence how sediments deform when under stress. When lithology is fairly constant, anisotropy of magnetic susceptibility (AMS) can be a simple technique for measuring the relative consolidation
Bennett, Booth, Borrero, Bray, Constable, Dorman, Driscoll, Dugan, Edwards, Eichhubl, Field, Fischer, Fisher, Fisher, Geiss, Hendy, Hext, Hill, Homa Lee, Housen, Hu, Jelinek, Karlin, Kawamura, Kayen, King, Kirschvink, Kodama, Kopf, Kumar, Kurt Schwehr, Lambe, Lee, Leslie, Leslie, Lisa Tauxe, Liu, Locat, Marks, Marsaglia, McCabe, Mello, Neal Driscoll, O'Leary, Oey, Pan, Reimers, Riedinger, Rowan, Schlee, Schock, Schwehr, Shaw, Snowball, Soutar, Spinelli, Stephenson, Tarduno, Tarling, Tauxe, Tauxe, Thunell, Ward, Warrick   +63 more
core   +3 more sources

Notable Impact of Paleotectonic Stress on Gold Mineralisation in the West Qinling Orogen

Geological Journal, EarlyView.
By applying fuzzy clustering and multiple inverse methods, we systematically processed the data of vein and fault slip in this ore deposit to reveal the transition of orogenic geological environment and paleotectonic stress field. Our research results show two different stress states: the northwest–southeast extensional stress field and the northeast ...
Hongyan Wang, Aibing Chen, Jian Yang, Yuan Zhang   +3 more
wiley   +1 more source

Temporal evolution, petrography and composition of dolostones in the Upper Devonian Plavinas Regional Stage, southern Estonia and northern Latvia [PDF]

Estonian Journal of Earth Sciences, 2013
The Upper Devonian Plavinas Regional Stage in southern Estonia and northern Latvia is represented by dolostones containing interlayers of dolomitic marlstones and limestones.
Anne Kleesment, Kristjan Urtson, Tarmo Kiipli, Tõnu Martma, Anne Põldvere, Toivo Kallaste, Alla Shogenova, Kazbulat Shogenov   +7 more
doaj   +1 more source

Molecular Palaeontology Prospects From Exceptionally Preserved Eocene Brackish‐Water Bivalve Batissa sitakaraensis (Venerida: Corbiculidae) From Hokkaido, Japan

Geological Journal, EarlyView.
This study reports the exceptional preservation of the Eocene freshwater bivalve Batissa sitakaraensis from Hokkaido, Japan. Multimodal analyses reveal that both the aragonitic shell mineralogy and the delicate organic periostracum retain their original structural and chemical characteristics after millions of years.
Taro Yoshimura, Kazuki Hirota, Hiroyuki Kagi, Takashi Matsubara, Takenori Sasaki   +4 more
wiley   +1 more source

Decoupling climate and human impacts on the nitrogen cycle during the Irish Bronze Age

Journal of Quaternary Science, EarlyView.
ABSTRACT Disentangling climate variability and human activity in past nitrogen cycling is key to understanding ecosystems. Previous studies in Ireland observed a widespread, permanent shift in terrestrial nitrogen cycling during Later Prehistory, potentially linked to intensifying land‐use.
Sarah Ferrandin, Gill Plunkett, Neil Ogle   +2 more
wiley   +1 more source

Linkage of diagenesis to depositional environments and stratigraphy in the northern part of the Baltic basin [PDF]

Estonian Journal of Earth Sciences, 2012
The spatial and temporal distribution of carbonate cementation was investigated in Devonian siliciclastic rocks of the northern part of the Baltic basin, using geochemical (oxygen and carbon stable isotope, microprobe and bulk chemical analyses), optical,
Kristjan Urtson, Kazbulat Shogenov, Alla Shogenova, Kalle Kirsimäe, Tõnu Martma, Anne Kleesment   +5 more
doaj   +1 more source

Cadmium sulfide in a Mesoproterozoic terrestrial environment [PDF]

, 2014
Peer ...
Bowden, S., Parnell, J., Spinks, S., Still, J., Thayalan, W.   +4 more
core   +1 more source