Geochemical Characteristics of Early Permian Pyroclastic Rocks in the Jimunai Basin, West Junggar, Xinjiang (NW China): Implications for Provenance and Tectonic Setting
نویسندگان
چکیده
During the Late Paleozoic, West Junggar (Xinjiang, NW China) experienced a shift in tectonic setting from compression to extension. Ha'erjiao is an important area for investigating collisional structures, post–collisional and magmatic activities. Based on petrological geochemical characteristics of pyroclastic other volcanic rocks Permian Kalagang Formation borehole ZKH1205 Jimunai Basin, main types source rock deposited basin are identified their implications Early examined. The abundance basalt andesite lithic fragments rocks, together with REE contents transition high field strength elements show that were chiefly intermediate–basic rocks. High ICV values, low CIA Rb/Sr ratios, Th/U ratios mineralogical features suggest weak chemical weathering rocks; patterns might not only have been impacted by crustal contamination but also be related nature magma area. properties distinguish them arc-related ones, such samples plot within-plate (WPB) some diagrams. This consistent formation background this region.
منابع مشابه
Provenance, Tectonic Setting & Geochemical Maturity of The Early Miocene Pyawbwe Formation, Sakangyi –Thayet Area, Magway Region, Myanmar.
Abstract The best exposed Early Miocene (820 m. thick. ) shales and interbedded silty sandstones beds of the Pyawbwe Formation at Sakangyi- Thayat area,Magway Region are investigated geochemically by using Siemens SRS- X Ray 303 AS XRF Spectrometer. Major and some trace element concentrations have been determined to achieve their provenance, tectonic setting ,paleoweathering , paleoclimate and ...
متن کاملGeochemical And Petrographic Studies Of Lokoja Sandstone: Implications On Source Area Weathering, Provenance, And Tectonic Setting
Ten road cut samples collected from five lithological sections of Lokoja sandstone formation in the Middle Niger basin were investigated using integrated granulometric, petrographic and geochemical analyses. Results of grain size analysis; standard deviation and skewness which ranges from 0.08 to -0.05 and 0.59 to -0.07 respectively suggest very well sorted to moderately well sorted sediments. ...
متن کاملOverpressure generation and evolution in a compressional tectonic setting, the southern margin of Junggar Basin, northwestern China
Overpressure is widespread in the southern margin of the Junggar Basin, northwestern China. Pressure measurements in drillstem tests and repeated formation tests and estimates from wire-line logs indicate contrasting overpressure values between permeable sandstones and adjacent low-permeability mudrocks. In addition, excess pressure differs among anticlines with similar depth, lithologies, and ...
متن کاملApatite fission track age of Mesozoic sandstones from Beipiao basin, eastern China: Implications for basin provenance and tectonic evolution
The apatite fission track (FT) analysis of Jurassic sandstones from the Beipiao basin in the eastern China indicates a large variation in FT age peaks. The sandstone of the Beipiao Formation has two peak ages at 178.8 and 40.0 Ma, while the sandstone of the Tuchengzi Formation has three age peaks at 152.0, 77.5 and 32.5 Ma. This implies that the provenance of the Beipiao basin in the early Jura...
متن کاملPetrography, Mineralogy and Geochemistry of Kuhkamar Shale in the Roum section (South of Qayen): Application for Provenance and Tectonic setting
The Kuhkamar shale with a thickness of 354 m is composed of siliciclastic rocks (sandstone and shale). Petrography studies of the sandstones in this area show two petrofacies including arkose and sub-arkose. These sandstones composed of sub rounded to moderately sorted; therefore, compositionaly to texturaly, they are immature to submature with mono and polycrystalline quartz and k-feldespar. I...
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: Acta Geologica Sinica-english Edition
سال: 2021
ISSN: ['1755-6724', '1000-9515']
DOI: https://doi.org/10.1111/1755-6724.14412