Gondwana Research
Papers 3310
1 page of 331 pages (3,310 results)
Published in Gondwana Research6.48
Jinyu Liu1
Estimated H-index: 1
(China University of Geosciences),
Qingfei Wang23
Estimated H-index: 23
(China University of Geosciences)
+ -3 AuthorsEdward M. Ripley41
Estimated H-index: 41
(IU: Indiana University Bloomington)
Abstract The temporal and spatial variations of Late Paleozoic basaltic lavas in Baoshan, the northern part of a Gondwana-derived micro-continental block called Sibumasu, are important for Gondwana reconstruction. Magmatic zircon crystals from three selected dolerite dykes in the Baoshan region yield U Pb ages from ~295 to ~310 Ma. These new ages, together with previous zircon U Pb ages for this type of rock, define a protracted (~30 myr) episode of basaltic magmatism from ~310 to 280 Ma in a sm...
Published in Gondwana Research6.48
Rachid Benaouda (JU: Jacobs University Bremen), Dennis Kraemer5
Estimated H-index: 5
(JU: Jacobs University Bremen)
+ -3 AuthorsMichael Bau41
Estimated H-index: 41
(JU: Jacobs University Bremen)
Abstract Recent exploration work in South Morocco revealed the occurrence of several carbonatite bodies, including the Paleoproterozoic Gleibat Lafhouda magnesiocarbonatite and its associated iron oxide mineralization, recognized here as iron-oxide-apatite (IOA) deposit type. The Gleibat Lafhouda intrusion is hosted by Archean gneiss and schist and not visibly associated with alkaline rocks. Metasomatized micaceous rocks occur locally at the margins of the carbonatite outcrop and were identified...
Published in Gondwana Research6.48
Mariana Brando Soares1
Estimated H-index: 1
(UFRJ: Federal University of Rio de Janeiro),
Atlas Vasconcelos Corrêa Neto3
Estimated H-index: 3
(UFRJ: Federal University of Rio de Janeiro),
Wendell Fabricio-Silva (UnB: University of Brasília)
Abstract The south Sao Francisco craton (SSFC) in Brazil is one of the few areas that are key to unveiling the Archean evolution of South America. Despite economic interest since the 18th century, the SSFC was not studied in detail until the beginning of the present decade. The two main greenstone belts in the SSFC, namely, the Rio das Velhas (RVGB) and the Pitangui (PGB), have traditionally been considered to represent a single Archean basin. Here, new geochemistry and geochronology data from b...
Published in Gondwana Research6.48
H. Baghli (University of Lyon), Emanuela Mattioli (Institut Universitaire de France)+ -3 AuthorsGuillaume Suan14
Estimated H-index: 14
(University of Lyon)
Abstract The Early Jurassic period was characterized by extreme environmental changes, as reflected by major global carbon isotope anomalies and abrupt changes in oxygen isotope and elemental records of marine organisms. Available data suggest an overall warm Early Jurassic climate interrupted by periods of severe cooling, with a climatic optimum during the early Toarcian. Available geochemical studies, however, have mainly focused on the northern margin of the Tethys Ocean, so that the palaeoge...
Published in Gondwana Research6.48
Susannah C. R. Maidment16
Estimated H-index: 16
(Natural History Museum),
Thomas J. Raven (University of Brighton)+ -3 AuthorsPaul M. Barrett36
Estimated H-index: 36
(Natural History Museum)
Abstract Eurypoda, the major radiation of armoured dinosaurs, comprises the ankylosaurs and their sister group, the stegosaurs. As the earliest-branching major clade of ornithischian dinosaurs, the evolutionary history of Eurypoda is significant for understanding both the palaeobiology of bird-hipped dinosaurs and the composition of middle Mesozoic ecosystems. Eurypodans were diverse and abundant throughout the Late Jurassic and Cretaceous in Laurasia; in contrast, their remains are extremely ra...
Published on Jul 17, 2019in Gondwana Research6.48
Yue Liao (PKU: Peking University), WEIChunjing32
Estimated H-index: 32
(PKU: Peking University)
Abstract The Huai'an Complex in the north-western Trans-North China Orogen, North China Craton is recognized to have undergone high-pressure metamorphism with controversial ages. Two mafic granulite samples (17HT13 and 16HT22) from Huangtuyao of the Huai'an Complex are documented for metamorphism based on petrography, mineral chemistry, phase equilibria modelling and zircon dating. The rocks comprise garnet, clinopyroxene, orthopyroxene, amphibole, plagioclase and ilmenite. They show clockwise P...
Published in Gondwana Research6.48
Xun Wei (Ontario Ministry of Natural Resources), Yi-Gang Xu53
Estimated H-index: 53
(CAS: Chinese Academy of Sciences)
+ -3 AuthorsXuefa Shi (Ontario Ministry of Natural Resources)
Abstract Deciphering the contribution of crustal materials to A-type granites is critical to understanding their petrogenesis. Abundant alkaline syenitic and granitic intrusions distributed in Tarim Large Igneous Province, NW China, offer a good opportunity to address relevant issues. This paper presents new zircon Hf-O isotopic data and U-Pb dates on these intrusions, together with whole-rock geochemical compositions, to constrain crustal melting processes associated with a mantle plume. The ~2...
Published on Jul 1, 2019in Gondwana Research6.48
Mingliang Huang1
Estimated H-index: 1
(CAS: Chinese Academy of Sciences),
Xianwu Bi25
Estimated H-index: 25
(CAS: Chinese Academy of Sciences)
+ 4 AuthorsLinbo Shang3
Estimated H-index: 3
(CAS: Chinese Academy of Sciences)
Abstract The giant Yulong porphyry Cu Mo deposit was formed in postsubduction setting in eastern Tibet. Origin of the ore-related Yulong intrusion remains a matter of debate. This study presents new whole-rock major and trace element geochemistry, in-situ apatite Sr Nd and zircon Hf O isotopes, and mineralogical chemistry of the Yulong intrusion. Least-altered samples from the Yulong intrusion have high SiO2 (66.3–69.5 wt%) and Al2O3 (14.9–15.5 wt%) contents, high La/Yb (36.4–68.0) and Sr/Y (46....
Published on Dec 1, 2019in Gondwana Research6.48
Yitian Lin (China University of Geosciences), Dongjie Tang7
Estimated H-index: 7
(China University of Geosciences)
+ 2 AuthorsKangjun Huang (Northwest University (United States))
Abstract The microbial origin of Precambrian iron formations is debated due to the lack of direct fossil evidence. In order to reveal the genesis of ironstones under low-oxygen levels, integrative studies of sedimentology, petrography, mineralogy, and geochemistry were conducted on the intertidal to shallow subtidal ooidal and stromatolitic ironstones from the terminal Paleoproterozoic Chuanlinggou Formation (ca. 1.65–1.64 Ga) of North China, using microscopy, SEM, EDS, ICP-OES, ICP-MS and MC-IC...
Published on Jul 1, 2019in Gondwana Research6.48
Álvaro del Rey (University of Chile), Katja Deckart11
Estimated H-index: 11
(University of Chile)
+ 2 AuthorsFernando Martínez6
Estimated H-index: 6
(University of Chile)
Abstract The tectonic evolution of the southwestern margin of the Pangea supercontinent is represented by the extensive late Paleozoic–Triassic magmatism along the southwestern margin of South America, including the Chilean Frontal Andes batholiths as part of the Choiyoi province. Several models have proposed cessation of subduction as the reason behind the vast amounts of felsic magmatism and apparent lack of typical arc magmas. Here, new U-Pb in zircon ages, and geochemical and isotope analyse...