In-situ sulfur isotope analysis of pyrite from the Pangjiahe gold deposit: Implications for variable sulfur sources in the north and south gold belt of the South Qinling orogen

The Zhangquanzhuang gold deposit is a special deposit in the Zhangjiakou district, on the northern margin of the North China Craton. It is characterized by the enrichment of sulfides, the scarcity of tellurides and zero to positive sulfur isotope compositions compared with the famous Dongping and Xiaoyingpan Te-Au-Ag deposit types of the same district. In this paper, we use the in-situ LA-(MC)-ICP-MS and bulk trace element concentrations of pyrite, and in-situ sulfur isotope compositions of sulfides, to study physicochemical conditions and mechanisms of mineral deposition in the Zhangquanzhuang deposit. Pyrite from stage I (PyI) contains high Te contents, pyrite from stage II (PyII) has the highest Co and Ni contents, and pyrite from stage III (PyIII) contains high Cr, Zn, Pb, Ag, Cu, Sb, Bi and Au contents. The calculated in-situ δ34SH2S values range from 0.9‰ to 6.1‰, and the values for stages I and II are higher than those for stage III. The mineral assemblages and trace element contents in pyrite show that large amounts of metals precipitated during stage III, in which the pH and logfO2 were constrained within the range of 4.1 to 5.2 and −36.9 to −32.1, respectively. Sulfidation and boiling derived from decreasing pressure may be the main mechanisms leading to mineral deposition in stage III. The Zhangquanzhuang gold deposit was formed in a mineral system that was different from the one that formed the Dongping and Xiaoyingpan Te-Au-Ag deposits, and should thus be called the “Zhangquanzhuang−type” deposit and considered a third gold deposit type in the Zhangjiakou ore field.

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A ∼2.5 Ga magmatic event at the northern margin of the Yangtze craton: Evidence from U-Pb dating and Hf isotope analysis of zircons from the Douling Complex in the South Qinling orogen

Chinese Science Bulletin ◽

10.1007/s11434-013-5904-1 ◽

2013 ◽

Vol 58 (28-29) ◽

pp. 3564-3579 ◽

Cited By ~ 94

Author(s):

Juan Hu ◽

XiaoChun Liu ◽

LongYao Chen ◽

Wei Qu ◽

HuaiKun Li ◽

...

Keyword(s):

Isotope Analysis ◽

Hf Isotope ◽

Qinling Orogen ◽

The South ◽

Yangtze Craton ◽

Northern Margin ◽

South Qinling ◽

Magmatic Event

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Ore genesis of the Bake gold deposit, southeastern Guizhou province, China: Constraints from mineralogy, in-situ trace element and sulfur isotope analysis of pyrite

Ore Geology Reviews ◽

10.1016/j.oregeorev.2018.09.018 ◽

2018 ◽

Vol 102 ◽

pp. 740-756 ◽

Cited By ~ 2

Author(s):

An-Lu Liu ◽

Man-Rong Jiang ◽

Thomas Ulrich ◽

Jun Zhang ◽

Xiao-Jun Zhang

Keyword(s):

Trace Element ◽

Gold Deposit ◽

Sulfur Isotope ◽

Isotope Analysis ◽

Guizhou Province ◽

Ore Genesis

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Observed seasonal regimes of North-South Atlantic Ocean interbasin exchange

10.31223/osf.io/ykm29 ◽

2019 ◽

Author(s):

Hamed D. Ibrahim

Keyword(s):

North Atlantic ◽

Climate Models ◽

South Atlantic ◽

Meridional Overturning Circulation ◽

Volume Flux ◽

The South ◽

The North ◽

Basin Scale ◽

Interbasin Exchange ◽

North And South

North and South Atlantic lateral volume exchange is a key component of the Atlantic Meridional Overturning Circulation (AMOC) embedded in Earth’s climate. Northward AMOC heat transport within this exchange mitigates the large heat loss to the atmosphere in the northern North Atlantic. Because of inadequate climate data, observational basin-scale studies of net interbasin exchange between the North and South Atlantic have been limited. Here ten independent climate datasets, five satellite-derived and five analyses, are synthesized to show that North and South Atlantic climatological net lateral volume exchange is partitioned into two seasonal regimes. From late-May to late-November, net lateral volume flux is from the North to the South Atlantic; whereas from late-November to late-May, net lateral volume flux is from the South to the North Atlantic. This climatological characterization offers a framework for assessing seasonal variations in these basins and provides a constraint for climate models that simulate AMOC dynamics.

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Four new Burmese species of Hemiphyllodactylus Bleeker (Squamata: Gekkonidae) from distantly related parapatric clades from the Shan Plateau and Salween Basin

Zootaxa ◽

10.11646/zootaxa.4758.1.2 ◽

2020 ◽

Vol 4758 (1) ◽

pp. 45-82 ◽

Cited By ~ 1

Author(s):

L. LEE GRISMER ◽

PERRY L. JR. WOOD ◽

EVAN S. H. QUAH ◽

MYINT KYAW THURA ◽

JAMIE R. OAKS ◽

...

Keyword(s):

New Species ◽

Cloud Forest ◽

Mitochondrial Gene ◽

Color Pattern ◽

The South ◽

Taxonomic Analysis ◽

The North ◽

North And South ◽

Northwestern Thailand

An integrative taxonomic analysis based on morphology, color pattern, and the mitochondrial gene ND2 recovered four new species of Hemiphyllodactylus Bleeker that are endemic to the Shan Plateau or Salween Basin in eastern Myanmar. Hemiphyllodactylus ngwelwini sp. nov. from the Shan Plateau is part of the earlier described “eastern Myanmar clade” renamed herein as the north lineage and H. kyaiktiyoensis sp. nov. and H. pinlaungensis sp. nov. of the Shan Plateau and H. zwegabinensis sp. nov. of the Salween Basin compose an entirely new Burmese clade herein referred to as the south lineage. Although the north and south lineages come within 46 km of one another on the Shan Plateau, they are not sister lineages but sequentially separated by two lineages from Yunnan, China and another from northwestern Thailand. Hemiphyllodactylus zwegabinensis sp. nov. is the first species of this genus to be recorded from the Salween Basin and is known only from a wind-blown cloud forest on the top of the insular, karstic mountain Zwegabin in Kayin State. All other Burmese species except for H. typus, are endemic to the various localities throughout the Shan Plateau. These four new species bring the total number of Hemiphyllodactylus in Myanmar to at least 10 which is certainly an extreme underestimate of the diversity of this genus given that we discover new species at every upland locality we survey.

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