Geochemistry of late Mesozoic mafic magmatism in west Shandong Province, eastern China: Characterizing the lost lithospheric mantle beneath the North China Block.

AbstractZoned olivine grains are abundant in the late Mesozoic Shatuo gabbro (southern Taihang Mountains, central North China Craton). Olivine cores are rich in MgO and NiO, rims are rich in FeO and MnO, and both cores and rims have very low CaO contents. The cores invariably have a high Mg no. (92–94), similar to olivine xenocrysts from Palaeozoic kimberlites in eastern China. The compositional features of these olivines imply that they are xenocrysts rather than phenocrysts, namely, disaggregates of mantle peridotites at the time of intrusion. The compositional similarity of olivine cores to xenocrysts from Palaeozoic kimberlites suggests that the lithospheric mantle beneath the central North China Craton is ancient and refractory in nature, and quite different from eastern China, where the mantle is mainly composed of newly accreted materials resulting from large-scale lithospheric removal and replacement. The contrasting features of the lithospheric mantle beneath the eastern and central North China Craton imply that the large-scale lithospheric removal in Phanerozoic times was mainly confined to the eastern North China Craton.

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The Mesozoic Tectonic Dynamics and Chronology in the Eastern North China Block

Journal of Geological Research ◽

10.1155/2012/291467 ◽

2012 ◽

Vol 2012 ◽

pp. 1-11 ◽

Cited By ~ 2

Author(s):

Quanlin Hou ◽

Qing Liu ◽

Hongyuan Zhang ◽

Xiaohui Zhang ◽

Jun Li

Keyword(s):

North China ◽

Late Triassic ◽

Upper Crust ◽

North China Block ◽

Late Mesozoic ◽

Detachment Faults ◽

The North ◽

North Part ◽

Strong Compression ◽

Tectonic System

Mesozoic tectonic events in different areas of the eastern North China Block (NCB) show consistency in tectonic time and genesis. The Triassic collision between NCB and Yangtze results in the nearly S-N strong compression in the Dabie, Jiaodong, and west Shandong areas in Middle Triassic-Middle Jurassic. Compression in the Yanshan area in the north part of NCB was mainly affected by the collision between Mongolia Block and NCB, as well as Siberia Block and North China-Mongolia Block in Late Triassic-Late Jurassic. However, in the eastern NCB, compressive tectonic system in Early Mesozoic was inversed into extensional tectonic system in Late Mesozoic. The extension in Late Mesozoic at upper crust mainly exhibits as extensional detachment faults and metamorphic core complex (MCC). The deformation age of extensional detachment faults is peaking at 120–110 Ma in Yanshan area and at 130–110 Ma in the Dabie area. In the Jiaodong area eastern to the Tan-Lu faults, the compression thrust had been continuing to Late Mesozoic at least in upper crust related to the sinistral strike slipping of the Tan-Lu fault zone.The extensional detachments in the eastern NCB would be caused by strong crust-mantle action with upwelling mantle in Late Mesozoic.

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Late Mesozoic extensional tectonics in the North China block: a crustal response to subcontinental mantle removal?

BSGF - Earth Sciences Bulletin ◽

10.2113/gssgfbull.177.6.287 ◽

2006 ◽

Vol 177 (6) ◽

pp. 287-297 ◽

Cited By ~ 80

Author(s):

Wei Lin ◽

Qingchen Wang

Keyword(s):

North China ◽

Normal Faults ◽

Mantle Lithosphere ◽

Extensional Tectonics ◽

North China Block ◽

Late Mesozoic ◽

Continental Scale ◽

The North ◽

Fluid Transfer ◽

Cretaceous Magmatism

Abstract In the North China block, Cretaceous extensional tectonics is expressed by numerous syntectonic plutons bounded by ductile normal faults and several metamorphic core complexes (MCC). Cretaceous half-grabens filled by continental terrigenous deposits are widespread. The examples of MCC from South Liaoning Peninsula, Yiwulüshan, Hohhot as well as the Yunmengshan syntectonic pluton spread along ca 2000 km suggest that the early Cretaceous extensional tectonics in the North China block is globally symmetric. The geodynamics setting of this continental-scale extension remains disputed. It is not satisfactorily explained by back-arc rifting related to the Paleo-Pacific subduction or crustal “unthickening”. Mantle lithosphere removal is, however, considered. Upwelling of asthenosphere may be the origin of heat advection and fluid transfer from mantle to lower crust, thus triggerring the Cretaceous magmatism, crustal softening and diffuse continental stretching. Several possible lithosphere-scale models, such as convective removal of mantle lithosphere and detachment of a large piece of mantle, are discussed.

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Zircon U-Pb dating for the earliest Neoproterozoic mafic magmatism in the southern margin of the North China Block

Chinese Science Bulletin ◽

10.1007/s11434-006-2114-0 ◽

2006 ◽

Vol 51 (19) ◽

pp. 2375-2382 ◽

Cited By ~ 34

Author(s):

Yongqing Liu ◽

Linzhi Gao ◽

Yanxue Liu ◽

Biao Song ◽

Zongxiu Wang

Keyword(s):

North China ◽

North China Block ◽

Mafic Magmatism ◽

The North ◽

Southern Margin

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Late mesozoic mafic intrusive complexes in North China Block: constraints on the nature of subcontinental lithospheric mantle

Physics and Chemistry of the Earth Part A Solid Earth and Geodesy ◽

10.1016/s1464-1895(01)00125-9 ◽

2001 ◽

Vol 26 (9-10) ◽

pp. 759-771 ◽

Cited By ~ 98

Author(s):

F. Guo ◽

W.-M. Fan ◽

Y.-J. Wang ◽

G. Lin

Keyword(s):

Lithospheric Mantle ◽

North China ◽

Subcontinental Lithospheric Mantle ◽

North China Block ◽

Late Mesozoic

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Chapter 35: Gold Deposits of the Jiaodong Peninsula, Eastern China

10.5382/sp.23.35 ◽

2020 ◽

pp. 753-774

Author(s):

Kun-Feng Qiu ◽

Richard J. Goldfarb ◽

Jun Deng ◽

Hao-Cheng Yu ◽

Zong-Yang Gou ◽

...

Keyword(s):

South China ◽

North China ◽

Gold Mineralization ◽

Eastern China ◽

Gold Deposits ◽

Fault System ◽

South China Block ◽

North China Block ◽

The North ◽

Basement Rocks

Abstract The Jiaodong gold province, within the eastern margin of the North China block and the translated northeastern edge of the South China block, has a stated premining gold resource exceeding 4,500 metric tons (t). It is thus one of the world’s largest gold provinces, with a present cumulative annual production estimated at 60 t Au. More than 90% of the Jiaodong gold resource is hosted by batholiths and related bodies of the Linglong (ca. 160–145 Ma) and, to a lesser degree, Guojialing (ca. 130–122 Ma) suites. The intrusions were emplaced into high-grade metamorphic basement rocks of the Precambrian Jiaobei (North China block) and Sulu (South China block) terranes during a 70-m.y.-period of lithospheric delamination, extensional core complex formation, and exhumation. The deposits are located about 20 to 200 km to the east of the continental-scale NNE-striking Tancheng-Lujiang (Tan-Lu) strike-slip fault system. They occur along a series of more regional NNE- to NE-striking brittle and ductile-brittle faults, which appear to intersect the Tan-Lu main structure to the southwest. This system of early to middle Mesozoic regional thrust faults, reactivated during Cretaceous normal motion and ore formation, tends to occur along the margins of the main Linglong batholiths or between intrusions of the two suites of granitoids. Orebodies are mainly present as quartz-pyrite veins (Linglong-type) and as stockwork veinlets and disseminated mineralization (Jiaojia-type). The two mineralization styles are transitional and may be present within the same gold deposit. The ca. 120 Ma timing of gold mineralization correlates with major changes in plate kinematics in the Pacific Basin and the onset of seismicity along the Tan-Lu fault system, with the enormous fluid volumes and associated metal being derived from sediment devolatilization above the westerly subducting Izanagi slab.

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Preliminary Proterozoic apparent polar wander paths for the South China Block and their tectonic implications

Canadian Journal of Earth Sciences ◽

10.1139/e97-117 ◽

1998 ◽

Vol 35 (3) ◽

pp. 302-320 ◽

Cited By ~ 3

Author(s):

Huimin Zhang

Keyword(s):

South China ◽

North China ◽

Eastern China ◽

North China Block ◽

Polar Wander ◽

Late Proterozoic ◽

The North ◽

Apparent Polar Wander Path ◽

Paleomagnetic Study ◽

Middle Proterozoic

Results of a regional paleomagnetic study of Precambrian rocks in central-east China are summarized and interpreted. The study is a partial outcome of a geoscience transect incorporating three terranes, namely the Yangzi, Jiangnan, and Huaxia blocks. Paleomagnetic poles derived from a range of metamorphic, igneous, and sedimentary rocks define a northeast to southwest swath crossing the present Pacific Ocean and interpreted to embrace Early to Late Proterozoic times. All three terranes define segments of the same swath and correlate with a similar apparent polar wander path previously defined from the North China Block. The results imply that the constituent blocks of eastern China formed a united block during Early to Middle Proterozoic times. Later relatively large fragmentation is confirmed by Late Proterozoic apparent polar wander path records of the North China and South China Blocks.

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