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1081
Integration of bedrock, seismic tomographic and plate kinematic constraints to test models of the India-Asia collision
Published 2020“…Our analysis demonstrates that the Neotethys Ocean was consumed by at least two subduction zones since the Jurassic. At the onset of the India-Asia collision at 59±1 Ma, one subduction zone was active along the southern Asian continental margin at ~20°N. …”
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1082
L'évolution des peuplements d'ammonites au cours de l'Oxfordien inférieur (Zone à Mariae et Zone à Cordatum) du Jura (Est de la France) [The evolution of ammonite associations duri...
Published 2010-11-01“…The study of more than 40 sections in the "Creniceras renggeri marls" of the French Jura Range (Lower Oxfordian) has found: * a precise biochronostratigraphic subdivison of 16 successive populations or associations which appears to be stable over the whole geographic area concerned; * the correlation of these populations with the Lower Oxfordian zones of the GFÉJ (French Research Jurassic Group) and with those of southern England (Weymouth) and Poland (Cracow area); * an autecologic and synecologic analysis of Oxfordian ammonite associations in the Jura Mountains; * an interpretation of these faunas in terms of palaeo-depth and sequence stratigraphy units.The main results of the study are the following: * identification of the Costicardia Subzone; * validation of the subdivision of the Mariae Zone established by Fortwengler and Marchand (1994), with a woodhamense horizon above a scarburgense horizon; * division of the woodhamense horizon into two units: the lower one is the woodhamense s.s. unit and the upper one includes abundant specimens of woodhamense var. normandiana Spath; * correlation of tectonic units on either side of the Salins fault and of some characteristics of the ammonite populations; * identification of five steps of changes in depth in the Jura area which may be interpreted as sequence stratigraphic units: a first episode of deepening during the period bounded by the scarburgense and praemartini horizons, an episode of stability bounded by the beginning and the end of the alphacordatum horizon, a slight regressive trend that lasted throughout the duration of the praecordatum horizon, a second episode of stability that persisted from the Bukowskii Subzone to the Costicardia Subzone, and a third deepening trend during the existence of the Cordatum Subzone.…”
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1083
SIMS Zircon U-Pb Ages and O Isotope Compositions of Gabbro from the Laguoco Ophiolite from Western Shiquanhe–Yonzhu Suture Zone (Tibet) and Their Geological Significance
Published 2022-09-01“…The SIMS zircon U-Pb ages of the gabbro samples are 187 ± 1.2 Ma and 189 ± 2.1 Ma, and the weighted averages of δ<sup>18</sup>O are 5.24‰ ± 0.12‰ and 5.34‰ ± 0.13‰, which are close to mantle-derived zircon δ<sup>18</sup>O (5.3‰ ± 0.3‰). …”
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LATE TRIASSIC (LATE NORIAN-RHAETIAN) RADIOLARIANS FROM THE ANTALYA NAPPES, CENTRAL TAURIDES, SOUTHERN TURKEY
Published 2002-11-01“…At the basal part of the section, the Late Triassic (late Norian-Rhaetian) Gökdere Formation is characterized by gray to beige cherty limestone at the base and pinkish red chert- gray to beige limestone alternation at the top, with moderately to well-preserved radiolarians in the red chert beds. The overlying Jurassic - Middle Cretaceous Hocaköy Radiolarite is mainly represented by chert-mudstone alternations with some limestone interlayers. …”
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1086
Detailed studies of the Callovian and Oxfordian microplankton from the Warboys and Warlingham boreholes
Published 1982“…The present thesis deals with biostratigraphic and palaeoenvironmental analyses of microplankton assemblages from the Kellaways Beds and Oxford Clay (Upper Jurassic) of the Warboys and Warlingham Boreholes, based on 118 samples. …”
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Thesis -
1087
Karst Terraines in Iran - Examples from Lorestan
Published 2016-06-01“…Večina jih je razvitih v bazenih Mazindarana in Zagrosa. Zaradi prevladujočih tektonskih aktivnosti so kamnine zagroške cone bolj zakrasele. 56 % vseh izvirov je prav v tej coni. …”
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1088
Paleo-Tethyan Ocean Evolution and Indosinian Orogenesis in the East Kunlun Orogen, Northern Tibetan Plateau
Published 2022-12-01Get full text
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1089
A Global Data Set of Present‐Day Oceanic Crustal Age and Seafloor Spreading Parameters
Published 2020-10-01“…We find the mean age of oceanic crust is 64.2 Myr, slightly older than previous estimates, mainly due to the inclusion of pockets of Mesozoic aged crust in the Atlantic and Mediterranean and improvements to the Jurassic Pacific triangle. This older crust is partly compensated by additional Cenozoic‐aged back‐arc basin crust not included in previous models. …”
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1090
Detrital zircon geochronology and provenance of sediments within the Mesozoic basins: New insights into tectonic evolution of the Qinling Orogen
Published 2021-05-01“…The detrital zircons can be split by age peaks into five major groups, including Early Cretaceous, Late Triassic, Early Paleozoic, Neoproterozoic and Paleoproterozoic age peaks. …”
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1091
Age and anatomy of the Gongga Shan batholith, eastern Tibetan Plateau, and its relationship to the active Xianshui-he fault
Published 2016“…The age data constrain two striking tectonic-plutonic events: A complex Triassic-Jurassic (ca. 215-159 Ma) record of biotite-hornblende granodiorite, K-feldspar megacrystic granite and leucogranitic plutonism, and a Miocene (ca. 14-5 Ma) record of monzonite-leucogranite emplacement. …”
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1092
Geological and structural position of the Svetlinsky gold deposit (Southern Urals)
Published 2022-07-01“…The thrust caused bending moments in its wings, subsidence of the lying crust, emergence of a shallow marine basin with rapid accumulation of terrigenous carbonate sediments (C1v), and formation of numerous landslide structures. …”
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1093
A new fossil mantis shrimp and the convergent evolution of a lobster-like morphotype
Published 2021-04-01“…Originally, this included a head with six segments (ocular segment plus five appendage-bearing segments), a thorax region with eight segments, and a pleon with six segments. …”
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1094
Late Permian to Triassic intraplate orogeny of the southern Tianshan and adjacent regions, NW China
Published 2014-01-01“…The paper presents a new evolutionary model for the South Tianshan Orogen and adjacent regions, which includes seven stages: (I) late Ordovician–early Silurian opening of the South Tianshan Ocean; (II) middle Silurian–middle Devonian subduction of the South Tianshan Ocean beneath an active margin of the North Asian continent; (III) late Devonian–late Carboniferous closure of the South Tianshan Ocean and collision between the Kazakhstan-Yili and Tarim continental blocks; (IV) early Permian post-collisional magmatism and rifting; (V) late Permian–Triassic the first intraplate orogeny; (VI) Jurassic–Palaeogene tectonic stagnation and (VII) Neocene–Quaternary intraplate orogeny.…”
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1095
IODP Expedition 324: Ocean Drilling at Shatsky Rise Gives Clues about Oceanic Plateau Formation
Published 2011-09-01“…Integrated Ocean Drilling Program (IODP) Expedition 324 cored Shatsky Rise at five sites (U1346–U1350) to study processes of oceanic plateau formation and evolution. …”
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1096
Dynamics of a stepped carbon-isotope excursion: Ultra high-resolution study of Early Toarcian environmental change
Published 2012“…In the Toarcian (Early Jurassic; ~183Myr ago), the ocean-atmosphere system was subject to one of the largest perturbations of the carbon cycle in the last 250Myr known as the Toarcian Oceanic Anoxic Event (T-OAE). …”
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Structure and petroleum prospects of the northern part of the Barents-Kara Sea region
Published 2023-06-01Get full text
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