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Kailong Feng, Weilin Zhu, Xiaowei Fu, Kai Zhong, Shijie Zhao, Weizhen Chen, Zengyuan Zhou and Lichen Hu
The Qiantang Sag, as one of the East China Sea Shelf Basin?s sags with thick residual Mesozoic strata, has long lacked comprehensive foundational sedimentary research, significantly impeding the understanding of the region?s resource potential and geolog...
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Ruy Paulo Philipp, Ubiratan Ferrucio Faccini, Cesar Leandro Schultz, Gustavo Zvirtes, Matheus Philippe Bruckmann, Ernesto Lavina, Joice Cagliari, Andrea Ritter Jelinek, Renata Guimarães Netto, Adriano Roessler Viana and Miguel Angelo Stipp Basei
Zircon U-Pb geochronology was applied to investigate the provenance, depositional ages, and paleogeography of the southwestern Gondwana in detrital and ash fall sediments from Carboniferous to Jurassic succession of the southern Paraná Basin. Four detrit...
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Damaris Montano, Marta Gasparrini, Sébastien Rohais and Ramon De Luca
The Yacoraite Fm. (Salta rift basin, Argentina) consists of a mixed carbonate?siliciclastic lacustrine succession, interbedded with volcanic ash layers and organised in four third-order stratigraphic sequences. It is one of the few sites in South America...
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Leda Sanchez Bettucci,Umberto Giuseppe Cordani,Judith Loureiro,Elena Peel,Santiago Fort,Kei Sato
Pág. 442 - 471
A U-Pb SHRIMP zircon geochronological study was carried out in the Nico Pérez Terrane in the central-eastern portion of Uruguay with the aim of constraining its geological evolution and its cratonic affinity. Nico Pérez Terrane is made up by a mosaic of ...
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Alvaro Rodrigo Iriarte,Umberto Giuseppe Cordani,Kei Sato
Pág. 403 - 441
The Cordillera Real granitoids are a suite of Triassic and Oligocene plutons in the core of the Eastern Cordillera of the Central Andes of Bolivia. Their tectonic setting, chemical and ore compositions make them part of the so-called ?Inner Magmatic Arc?...
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Paulo Quezada,Francisco Hervé,Mauricio Calderón,Mark Fanning,Robert Pankhurst,Estanislao Godoy,Octavio Urbina,Rodrigo Suárez
Pág. 54 - 74
Previously undated low-grade metamorphic rocks from the Puerto Cisnes-Queulat area (44°30? S) contain detrital zircons of mid-Oligocene age (ca. 28 Ma). Their outcrops represent the easternmost occurrence of the late Oligocene to early Miocene marine vol...
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Alan Santos Polo,Guo Weimin,Fernando Rivera,Colombo Tassinari,Luis Cerpa,Shoji Kojima
Pág. 445 - 470
Early Jurassic arc-related igneous rocks host porphyry copper prospects and gold-bearing quartz vein deposits in southern Peru. Ten new zircon U-Pb ages for wall rocks of gold-bearing quartz veins, Jurassic rocks and copper-mineralized porphyry bodies in...
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José Duque-Trujillo,Camilo Bustamante,Luigi Solari,Álvaro Gómez-Mafla,Gloria Toro-Villegas,Susana Hoyos
Pág. 82 - 101
The Antioquia batholith represents the magmatic record of the interaction between the Farallón and Caribbean plates with the NW part of the South American Plate during the Meso-Cenozoic. Several authors have reported zircon U-Pb ages and whole rock geoch...
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Francisco Hervé,Mauricio Calderón,Mark Fanning,Robert Pankhurst,Carlos W. Rapela,Paulo Quezada
Pág. 301 - 317
Previous work has shown that Devonian magmatism in the southern Andes occurred in two contemporaneous belts: one emplaced in the continental crust of the North Patagonian Massif and the other in an oceanic island arc terrane to the west, Chaitenia, which...
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Marian V. Lupulescu, Jeffrey R. Chiarenzelli, Mark E. Pecha, Jared W. Singer and Sean P. Regan
Columbite crystals from niobium-yttrium-fluorine (NYF) pegmatites lacking zircon or containing metamict cyrtolite were analyzed for major and minor elements (Electron Microprobe (EMP)), trace elements (Laser Ablation-Inductively Coupled Plasma-Mass Spect...
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