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Primary Composition of Kimberlite Melt
Published 2023-11-01“…It is suggested that the primary kimberlite melt of asthenospheric origin is similar in composition to the high Fe, high Ti, coherent kimberlite from the Velikan dyke (in wt. %: SiO<sub>2</sub>–21.8, TiO<sub>2</sub>–3.5, Al<sub>2</sub>O<sub>3</sub>–4.0, FeO–10.6, MnO–0.19, MgO–21.0, CaO–17.2, Na<sub>2</sub>O–0.24, K<sub>2</sub>O–0.78, P<sub>2</sub>O<sub>5</sub>–0.99, CO<sub>2</sub>–12.6). …”
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742
Zircon U-Pb and Lu-Hf Isotopic Dating of Magmatic Rocks in the Wunugetushan Porphyry Copper-Molybdenum Deposit, Inner Mongolia
Published 2022-09-01“…RESULTS (1) The zircons in the study area have a high content of REE with strong enrichment of HREE, δEu negative anomaly and δCe positive anomaly, and the REE distribution curves are left-inclined. (2) The anisomitic monzogranites are the ore-hosting rocks with a weighted average value of 200.96±0.88Ma, indicating that the rock mass was formed in early Jurassic. Zircon εHf(t) ranges from 0.1 to 5.8, single-stage Hf model ages (TDM) range from 643Ma to 882Ma, and two-stage Hf model ages (TDMC) range from 874Ma to 1235Ma. (3) The rhyolite porphyritic lavas are the ore-forming parent rocks with a weighted average value of 179.58±0.91Ma, indicating that the rocks formed in the Early Jurassic. …”
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744
Mesozoic Thermo-Tectonic Evolution of the Western Altai Orogenic Belt (NW China): Insights from Low-Temperature Thermochronology
Published 2023-07-01“…Based on the associated thermal history modeling results, the Habahe area underwent a moderate cooling during the Late Triassic to Middle Jurassic (~230–170 Ma) with a cooling rate of ~0.8–1.1℃/Ma and a subsequent moderate to slightly rapid cooling stage during the Middle Jurassic to Early Cretaceous (170–130 Ma) with a cooling rate of ~1.5–2.3℃/Ma. …”
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Mineralization Age and Hydrothermal Evolution of the Fukeshan Cu (Mo) Deposit in the Northern Great Xing’an Range, Northeast China: Evidence from Fluid Inclusions, H–O–S–Pb Isotope...
Published 2020-06-01“…Chalcopyrite Re–Os dating yielded an isochron age of 144.7 ± 5.4 Ma, which is similar to the zircon U–Pb age of the quartz diorite porphyry, indicating that Late Jurassic quartz diorite porphyry and Cu mineralization occurred contemporaneously.…”
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750
Reconstruction of the proto-type basin and tectono-paleogeography of Tarim Block in the Mesozoic
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Mesozoic Notocupes revealed as the sister group of Cupedidae (Coleoptera: Archostemata)
Published 2023-08-01Get full text
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754
History of karstification and groundwater flow field within Triassic water-bearing strata in Julongshan syncline
Published 2022-09-01“…This period mainly manifested as burial karst under the water. From the Middle Jurassic to the Early Cretaceous, the EW-NW folds and faults or fissures were formed by Yanshanian movement, controlling the plane distribution pattern of carbonate rocks. …”
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" إعادة تقييم التوضّعات البازلتية في الجبال الساحلية السّورية " (مثال: جوبة الربند)
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756
A carbon-isotope perturbation at the Pliensbachian-Toarcian boundary: evidence from the Lias Group, NE England
Published 2010“…Two sharp δ13C org negative excursions, each with a magnitude of ∼ -2.5‰ and reaching minimum values of -28.5‰ , are recorded in the bulk organic-matter record in sediments of latest Pliensbachian to earliest Toarcian age. …”
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Potential for Volcanogenic Massive Sulfide Mineralization at the A6 Anomaly, North-West British Columbia, Canada: Stratigraphy, Lithogeochemistry, and Alteration Mineralogy and Che...
Published 2021-08-01“…The Middle Jurassic A6 Anomaly is located 30 km southeast of Eskay Creek, north-central British Columbia and consists of thick, altered felsic igneous rocks overlain by a mafic volcano-sedimentary package. …”
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An approach to the Da Vinci and Vesalio’s art: contribution to anatomical teaching
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INTEGRATED STRATIGRAPHY OF THE LOWER AND MIDDLE FERNIE FORMATION IN ALBERTA AND BRITISH COLUMBIA, WESTERN CANADA
Published 2004-03-01“…Here we report six new ages from the lowermost Red Deer Member (188.3 +1.5/-1 Ma); Highwood Member (ca. 173 Ma and 166.6 ± 0.2 Ma); and Grey Beds (167.0 ± 0.2 Ma, 165.6 ± 0.3 Ma, and 165.4 ± 0.3 Ma). …”
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