Biostratigraphy versus isotope geochronology: Testing the Urals island arc model
نویسندگان
چکیده
منابع مشابه
Galena Lead Isotope Model for Vancouver Island*
This paper demonstrates how a galena lead isotope model can be used to make decisions about the age and origin of ore deposits on Vancouver Island. To build this model we draw on the galena data of Table 1-9-1 (compare Andrew and Godwin, in press a, b, c and Godwin et al., 1988). Galena lead isotope data from Vancouver Island do not show a systematic evolution with time. Therefore they cannot b...
متن کاملGeochronology and Mammalian Biostratigraphy of Middle and Upper Paleocene Continental Strata, Bighorn Basin, Wyoming
The Bighorn Basin of northwestern Wyoming preserves one of the most complete records of middle Paleocene to lower Eocene continental biota. The geochronology of this important interval depends partly on numerical calibration of the geomagnetic polarity time scale (GPTS), but the middle and late Paleocene parts of the GPTS have been poorly constrained radioisotopically. A new volcanic ash from t...
متن کاملOxygen Isotope Geochemistry of Oceanic-Arc Lavas
Variations of oxygen isotope ratios in arc-related lavas can constrain trace-element enrichment in a mantle source being fluxed by addition the contributions of subducted crustal igneous rocks, sediments, and of aqueous fluid. Comparison of this model with observed variations fluids to the sub-arc mantle. We have measured oxygen isotope in the geochemistry of lavas from the Vanuatu–Fiji–New Cal...
متن کاملMio-Pleistocene Zanda Basin biostratigraphy and geochronology, pre-Ice Age fauna, and mammalian evolution in western Himalaya
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t a r t i c l e i n f o The Pliocene (5.3–2.6 Ma) of Tibet witnessed the drying of the northern Tibetan Platea...
متن کاملProvenance of Triassic and Jurassic Sandstones in the Banda Arc: Petrography, Heavy Minerals and Zircon Geochronology
Quartz-rich sandstones in the Banda Arc Islands are thought to be equivalent of Mesozoic sandstones on the Australian NW Shelf where they are important proven and potential reservoirs. Previous studies suggested that rivers draining Australia provided most of the sediment input and there have been suggestions of a northern provenance for some Timor sediments. We present results from a provenanc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geoscience Frontiers
سال: 2019
ISSN: 1674-9871
DOI: 10.1016/j.gsf.2018.09.002