Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
40Ar‐39Ar Geochronology and Tectonic Implications of the Blueschist from Northwestern Qiangtang, Northern Tibet, Western China
View through CrossRef
Abstract:Blueschist exposed in the northwestern Qiangtang terrane, northern Tibet, western China (∼84°30′ E, 34°24′ N), provides new constraints on the tectonic evolution of Qiangtang as well as northern Tibet. The blueschist represented by lawsonite‐ and glaucophane‐bearing assemblages equilibrated at 375–400 °C and ∼11 kbar. 40Ar‐39Ar analysis on mineral separate from one blueschist sample yielded a well‐defined plateau age of ∼242 Ma. Geochemical studies show the blueschist is metamorphosed within‐plate basalts. The high pressure‐low temperature blueschist indicates a Triassic event of lithosphere subduction, and clearly represents an extension of the central Qiangtang metamorphic belt, and defines an in situ suture between eastern and western Qiangtang.
Title: 40Ar‐39Ar Geochronology and Tectonic Implications of the Blueschist from Northwestern Qiangtang, Northern Tibet, Western China
Description:
Abstract:Blueschist exposed in the northwestern Qiangtang terrane, northern Tibet, western China (∼84°30′ E, 34°24′ N), provides new constraints on the tectonic evolution of Qiangtang as well as northern Tibet.
The blueschist represented by lawsonite‐ and glaucophane‐bearing assemblages equilibrated at 375–400 °C and ∼11 kbar.
40Ar‐39Ar analysis on mineral separate from one blueschist sample yielded a well‐defined plateau age of ∼242 Ma.
Geochemical studies show the blueschist is metamorphosed within‐plate basalts.
The high pressure‐low temperature blueschist indicates a Triassic event of lithosphere subduction, and clearly represents an extension of the central Qiangtang metamorphic belt, and defines an in situ suture between eastern and western Qiangtang.
Related Results
Early development of Argon-39 as a new geochronometer for geologic processes on short time scales
Early development of Argon-39 as a new geochronometer for geologic processes on short time scales
Up until now, the cosmogenic radioisotope 39Ar has not been used for surface exposure or burial dating of minerals due to its low concentration in rocks and the large sample size r...
New developments in incremental heating detrital
40
Ar∕
39
Ar lithic (DARL) geochronology using Icelandic river sand
New developments in incremental heating detrital
40
Ar∕
39
Ar lithic (DARL) geochronology using Icelandic river sand
Abstract. Iceland records over 15 million years of complex volcanism resulting from the intersection of a mid-ocean ridge and mantle plume upwelling. The Iceland mantle plume has b...
Stratigraphy and Tectonics of Ladakh, Eastern Karakoram, Western Tibet and Western Kun Lun
Stratigraphy and Tectonics of Ladakh, Eastern Karakoram, Western Tibet and Western Kun Lun
Abstract
A new geological map on 1:1 million scale has been prepared for the first time, primarily to depict the various stratigraphic and tectonic units of north...
Apatite Fission Track Evidence of Uplift Cooling in the Qiangtang Basin and Constraints on the Tibetan Plateau Uplift
Apatite Fission Track Evidence of Uplift Cooling in the Qiangtang Basin and Constraints on the Tibetan Plateau Uplift
AbstractThe Qiangtang basin is located in the central Tibetan Plateau. This basin has an important structural position, and further study of its tectonic and thermal histories has ...
New Developments in Incremental Heating Detrital
40
Ar/
39
Ar Lithic (DARL) Geochronology using Icelandic River Sand
New Developments in Incremental Heating Detrital
40
Ar/
39
Ar Lithic (DARL) Geochronology using Icelandic River Sand
Abstract. Iceland records over fifteen million years of complex volcanism resulting from the intersection of mid-ocean ridge and mantle plume upwelling. The Iceland mantle plume ha...
Sedimentary Evolution of the Qinghai–Tibet Plateau in Cenozoic and its Response to the Uplift of the Plateau
Sedimentary Evolution of the Qinghai–Tibet Plateau in Cenozoic and its Response to the Uplift of the Plateau
Abstract:We have studied the evolution of the tectonic lithofacies paleogeography of Paleocene–Eocene, Oligocene, Miocene, and Pliocene of the Qinghai–Tibet Plateau by compiling da...
Phlogopite 40Ar/39Ar Geochronology for Guodian Skarn Fe Deposit in Qihe–Yucheng District, Luxi Block, North China Craton: A Link between Craton Destruction and Fe Mineralization
Phlogopite 40Ar/39Ar Geochronology for Guodian Skarn Fe Deposit in Qihe–Yucheng District, Luxi Block, North China Craton: A Link between Craton Destruction and Fe Mineralization
The Guodian Fe deposit is representative of the newly discovered Qihe–Yucheng high-grade Fe skarn ore cluster, Luxi Block, eastern North China Craton (NCC). The age of the Pandian ...
Definition of the Quaternary Qiangtang Paleolake in Qinghai‐Tibetan Plateau, China
Definition of the Quaternary Qiangtang Paleolake in Qinghai‐Tibetan Plateau, China
Abstract:Since the Quaternary, many lakes have been present in the Qinghai‐Tibetan Plateau. As peculiar geological processes in the evolution of the uplifting of Qinghai‐Tibetan Pl...