Jurassic rocks, bivalves, and depositional environments of the source area of the Yangtze River, Qinghai Province, western China

Yao, Huazhou; Zhang, Ren‐Jie; Duan, QiFa; Xiancai, Sheng; Niu, Zhijun; Wang, Jianxiong; Bo-fu, Zeng; Wu, Jing

doi:10.1007/s11430-011-4223-0

Cited by 18 publications

(12 citation statements)

References 5 publications

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“…Jurassic stratigraphy in the study area has been measured and described in numerous previous studies (Yang and Yin, 1988;Bai, 1989;BGMRQH, 1997;Wang et al, 2001;Sun, 2005;Yao et al, 2011;Fang et al, 2016). Here we add detailed description of the lithofacies and summarize fossils and interpretation of depositional environments from the literature and our own observation.…”

Section: Stratigraphymentioning

confidence: 94%

“…3). Abundant marine fossils, including bivalves, brachiopods, and ammonoids, indicate that the Yanshiping Group was deposited during the Middle and Late Jurassic (Yin, 1987 1988; Bai, 1989;Yao et al, 2011). Recent magnetostratigraphic studies refine the depositional ages of these five formations to >171.…”

Section: Jurassic Stratigraphy and Age Constraints In The Amdo-yanshimentioning

confidence: 99%

“…Both fresh-and brackish-water bivalves are present (Bai, 1989;Fang et al, 2016). The lower Quemoco Formation was probably deposited in a marginal marine to fluvial depositional environment (Yao et al, 2011). The upper part of the formation contains mainly dark-brown and dark-gray sandstone and siltstone, interbedded with minor amounts of mudstone and limestone.…”

Section: Yanshiping Areamentioning

confidence: 99%

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Jurassic sedimentation in the south-central Qiangtang terrane reveals successive terrane collisions in central Tibet

Garzione

Fan

et al. 2019

Geosphere

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Our limited knowledge of Mesozoic tectonism in the Tibetan Plateau has hindered understanding of its geologic evolution. This study uses zircon U-Pb geochronology to refine regional chronostratigraphy and infer the Jurassic sedimentary-tectonic evolution of the Bangong suture and the south-central Qiangtang terrane in the central plateau. During the late Early-early Middle Jurassic, fan delta and alluvial fan deposits sourced from the Amdo basement to the south occurred within the Amdo suture zone, as a result of collision between the Amdo basement and Qiangtang terrane. Since the Bajocian of the Middle Jurassic, continued sea-level rise transformed the Qiangtang terrane into a south-facing shallow continental shelf, and sedimentary detritus was predominantly sourced from the Hoh Xil and Kunlun terranes to the north. The contemporaneous magmatic arc in southern Qiangtang terrane was most likely submerged in a marine setting and did not contribute much detritus to the Middle Jurassic strata. Starting from the early Late Jurassic, a depositional hiatus occurred in the southern Qiangtang terrane, whereas the shallow marine to deltaic deposition in the central Qiangtang terrane received detritus not only from the Hoh Xil and Kunlun terranes to the north, but also from the magmatic arc in southern Qiangtang terrane to the south. The arrival of abundant Jurassic arc-derived detritus in central Qiangtang terrane since ca. 163 Ma was most likely caused by the early Late Jurassic initial collision between the Lhasa and Qiangtang terranes, which raised the southern Qiangtang magmatic arc to be a source region.

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Section: Stratigraphymentioning

confidence: 94%

Section: Jurassic Stratigraphy and Age Constraints In The Amdo-yanshimentioning

confidence: 99%

Section: Yanshiping Areamentioning

confidence: 99%

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Jurassic sedimentation in the south-central Qiangtang terrane reveals successive terrane collisions in central Tibet

Garzione

Fan

et al. 2019

Geosphere

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“…The brachiopods Burmirhynchia‐Holcothyris indicate a Bathonian (168–166 Ma) age [ Y. S. Wang et al , ; Yao et al , ]. The Biluoco Formation, a new stratigraphic unit established in this study, consists of conglomerate and sandstone overlying the Buqu Formation with angular unconformity. Based on the age of underlying and overlying strata, the Biluoco Formation is between the late Bathonian (168–166 Ma) and early Callovian (166–164 Ma) in age. The conformably overlying Suowa Formation mainly consists of limestone containing bivalves and ammonites, suggesting a Callovian (166–164 Ma) age [ Yao et al , ; Yin , ]. The Abushan Formation [ Wu et al , ], mainly consisting of conglomerates and sandstones and yielding Late Cretaceous pollens [ Wu et al , ], overlies Jurassic strata unconformably. Interbedded volcanic lavas were dated as 80–76 Ma [ Y. L. Li et al , ], 103–96 Ma [ Y. L. Li et al , ], and 83 Ma [ Wu et al , ], confirming the Late Cretaceous age.…”

Section: Geological Settingmentioning

confidence: 99%

Sedimentary and tectonic evolution of the southern Qiangtang basin: Implications for the Lhasa‐Qiangtang collision timing

et al. 2017

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The Mesozoic stratigraphic record of the southern Qiangtang basin in central Tibet records the evolution and closure of the Bangong‐Nujiang ocean to the south. The Jurassic succession includes Toarcian‐Aalenian shallow‐marine limestones (Quse Formation), Aalenian‐Bajocian feldspatho‐litho‐quartzose to feldspatho‐quartzo‐lithic sandstones (shallow‐marine Sewa Formation and deep‐sea Gaaco Formation), and Bathonian outer platform to shoal limestones (Buqu Formation). This succession is truncated by an angular unconformity, overlain by upper Bathonian to lower Callovian fan‐delta conglomerates and litho‐quartzose to quartzo‐lithic sandstones (Biluoco Formation) and Callovian shoal to outer platform limestones (Suowa Formation). Sandstone petrography coupled with detrital‐zircon U‐Pb and Hf isotope analysis indicate that the Sewa and Gaaco formations contain intermediate to felsic volcanic detritus and youngest detrital zircons (183–170 Ma) with εHf(t) ranging widely from +13 to −25, pointing to continental‐arc provenance from igneous rocks with mixed mantle and continental‐crust contributions. An arc‐trench system thus developed toward the end of the Early Jurassic, with the southern Qiangtang basin representing the fore‐arc basin. Above the angular unconformity, the Biluoco Formation documents a change to dominant sedimentary detritus including old detrital zircons (mainly >500 Ma ages in the lower part of the unit) with age spectra similar to those from Paleozoic strata in the central Qiangtang area. A major tectonic event with intense folding and thrusting thus took place in late Bathonian time (166 ± 1 Ma), when the Qiangtang block collided with another microcontinental block possibly the Lhasa block.

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“…These new results suggest that East Asia was the most likely place of origin of the Margaritiferidae. Although the statistical biogeographic models assume that the crown group of the family was widely distributed across the East Laurasia (East Asia + Mediterranean), the fossil evidence shows an East Asian origin for both the stem and the crown group (e.g., Chen, 1984;Jingshan et al, 1993;Ma, 1994Ma, , 1996Jiang et al, 2005;Pan and Sha, 2009;Fang et al, 2009;Yao et al, 2011), i.e., the region of the Yangtze Plate and the adjoining complex of small terranes that formed the present Tibetan Plateau (Van Damme et al, 2015). Additionally, †Shifangella margaritiferiformis Liu & Luo, 1981 from the Late Triassic deposits of China (Fang et al, 2009) is here proposed as a fossil member of the crown group of Margaritiferidae + Unionidae, most likely representing a separate ancestral family ( Supplementary Tables 3 and 4).…”

Section: Origin and Diversification Of The Margaritiferidaementioning

confidence: 99%

Expansion and systematics redefinition of the most threatened freshwater mussel family, the Margaritiferidae

Lopes‐Lima

Bolotov

et al. 2018

Molecular Phylogenetics and Evolution

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Two Unionida (freshwater mussel) families are present in the Northern Hemisphere; the Margaritiferidae, representing the most threatened of unionid families, and the Unionidae, which include several genera of unresolved taxonomic placement. The recent reassignment of the poorly studied Lamprotula rochechouartii from the Unionidae to the Margaritiferidae motivated a new search for other potential species of margaritiferids from members of Gibbosula and Lamprotula. Based on molecular and morphological analyses conducted on newly collected specimens from Vietnam, we here assign Gibbosula crassa to the Margaritiferidae. Additionally, we reanalyzed all diagnostic characteristics of the Margaritiferidae and examined museum specimens of Lamprotula and Gibbosula. As a result, two additional species are also moved to the Margaritiferidae, i.e. Gibbosula confragosa and Gibbosula polysticta. We performed a robust five marker phylogeny with all available margaritiferid species and discuss the taxonomy within the family. The present phylogeny reveals the division of Margaritiferidae into four ancient clades with distinct morphological, biogeographical and ecological characteristics that justify the division of the Margaritiferidae into two subfamilies (Gibbosulinae and Margaritiferinae) and four genera (Gibbosula, Cumberlandia, Margaritifera, and Pseudunio). The systematics of the Margaritiferidae family is re-defined as well as their distribution, potential origin and main biogeographic patterns.

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Jurassic rocks, bivalves, and depositional environments of the source area of the Yangtze River, Qinghai Province, western China

Cited by 18 publications

References 5 publications

Jurassic sedimentation in the south-central Qiangtang terrane reveals successive terrane collisions in central Tibet

Jurassic sedimentation in the south-central Qiangtang terrane reveals successive terrane collisions in central Tibet

Sedimentary and tectonic evolution of the southern Qiangtang basin: Implications for the Lhasa‐Qiangtang collision timing

Expansion and systematics redefinition of the most threatened freshwater mussel family, the Margaritiferidae

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