Characteristics of primary rare earth elements and yttrium in carbonate rocks from the Mesoproterozoic Gaoyuzhuang Formation, North China: Implications for the depositional system

2021 ◽  
Vol 415 ◽  
pp. 105864
Author(s):  
Ting Liang ◽  
Brian Jones
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Carbonate Rocks ◽  
North China ◽  
Depositional System

Fraction characteristics of rare earth elements in the surface sediment of Bohai Bay, North China

2012 ◽  
Vol 184 (12) ◽  
pp. 7275-7292 ◽  
Author(s):  
Yayan Xu ◽  
Jinming Song ◽  
Liqin Duan ◽  
Xuegang Li ◽  
Huamao Yuan ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Surface Sediment ◽  
North China ◽  
Bohai Bay

Rare earth elements in the terminal Ediacaran Bambuí Group carbonate rocks (Brazil): evidence for high seawater alkalinity during rise of early animals

2020 ◽  
Vol 336 ◽  
pp. 105506 ◽  
Author(s):  
Gustavo Macedo Paula-Santos ◽  
Sergio Caetano-Filho ◽  
Jacinta Enzweiler ◽  
Margareth S. Navarro ◽  
Marly Babinski ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Carbonate Rocks

Metasomatic Processes in the Lithospheric Mantle Beneath the No. 30 Kimberlite (Wafangdian Region, North China Craton)

2019 ◽  
Vol 57 (4) ◽  
pp. 499-517 ◽  
Author(s):  
Ren Z. Zhu ◽  
Pei Ni ◽  
Jun Y. Ding ◽  
Guo G. Wang ◽  
Ming S. Fan ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Trace Element ◽  
North China Craton ◽  
Lithospheric Mantle ◽  
North China ◽  
Compositional Data ◽  
Early Stage ◽  
Mantle Metasomatism ◽  
Element Data

AbstractThis paper presents the first major and trace element compositions of mantle-derived garnet xenocrysts from the diamondiferous No. 30 kimberlite pipe in the Wafangdian region, and these are used to constrain the nature and evolution of mantle metasomatism beneath the North China Craton (NCC). The major element data were acquired using an electron probe micro-analyzer and the trace element data were obtained using laser ablation inductively coupled plasma-mass spectrometry. Based on Ni-in-garnet thermometry, equilibrium temperatures of 1107–1365 °C were estimated for peridotitic garnets xenocrysts from the No. 30 kimberlite, with an average temperature of 1258 °C, and pressures calculated to be between 5.0 and 7.4 GPa. In a CaO versus Cr2O3 diagram, 52% of the garnets fall in the lherzolite field and 28% in the harzburgite field; a few of the garnets are eclogitic. Based on rare earth element patterns, the lherzolitic garnets are further divided into three groups. The compositional variations in garnet xenocrysts reflect two stages of metasomatism: early carbonatite melt/fluid metasomatism and late kimberlite metasomatism. The carbonatite melt/fluids are effective at introducing Sr and the light rare earth elements, but ineffective at transporting much Zr, Ti, Y, or heavy rare earth elements. The kimberlite metasomatic agent is highly effective at element transport, introducing, e.g., Ti, Zr, Y, and the rare earth elements. Combined with compositional data for garnet inclusions in diamonds and megacrysts from the Mengyin and Wafangdian kimberlites, we suggest that these signatures reflect a two-stage evolution of the sub-continental lithospheric mantle (SCLM) beneath the NCC: (1) early-stage carbonatite melt/fluid metasomatism resulting in metasomatic modification of the SCLM and likely associated with diamond crystallization; (2) late-stage kimberlite metasomatism related to the eruption of the 465 Ma kimberlite.

Tauride Carbonate Platform Bauxite Deposits (Turkey) as an Alternative Source for Gallium

2021 ◽  
Author(s):  
Hatice Nur Bayram ◽  
Ali Erdem Bakkalbasi ◽  
Zeynep Doner ◽  
Ali Tugcan Unluer ◽  
Huseyın Kocaturk ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Carbonate Rocks ◽  
Carbonate Platform ◽  
Primary Source ◽  
Geochemical Data ◽  
Strong Positive Correlation ◽  
Alternative Source ◽  
Positive Correlation ◽  
Bayer Liquor

<p>Mediterranean type karstic bauxite deposits are considered as the primary source for aluminum (Al) production in Europe. During the Al production, Gallium (Ga) is extracted from the so called Bayer-liquor during the processing of bauxite to alumina. Ga, a rare metal, is widely used in modern chemistry and electronic industry. During the past decades, the worldwide demand for Ga has been continuously increasing. In Turkey, karstic bauxite deposits are generally found with shallow marine carbonate rocks which were deposited during Mesozoic period and located in Tauride Carbonate platform. Most of these karstic bauxite deposits can be hosted considerable Ga enrichments, with other immobile elements such as rare earth elements (REE), titanium (Ti), lithium (Li), and iron (Fe). This work focuses on the revealing of the potential Ga enrichments in bauxides from different deposits of Turkey (Mortaş-Doğankuzu, Konya; Küçükkoraş, Karaman; Acıelma-Yoğunoluk, Kahramanmaraş bauxite deposits). Geochemical data of major and trace elements of studied bauxite deposits show that these deposits have significant Ga enrichments (up to 72.6 ppm), as well as the REE (up to 580 ppm), Ti (up to 1.8%), and Li (up to 428 ppm) enrichments. In addition, the Ga enrichments show strong positive correlation with heavy rare earth elements (HREE) and moderate positive correlation with Al, Fe, Ti, Li and Sn elements. In this context, it can be concluded that the most probable source for Ga is rock forming aluminosilicates of the source rock due to the substitution with Al<sup>3+</sup> and Fe<sup>3+</sup>. During weathering process Ga exhibiting immobile behavior much like Al and Fe. Gallium is than incorporated into Al-bearing phases and thus enriched in the bauxite. Presence of Li content can be also interpreted as a contribution from micaceous source such as meta-carbonate rocks of Tauride platform. Moreover, geochemical association between Ga, Ti, Li, tin (Sn) and HREE can be explained by the redox and pH conditions causing other ions seperated from shallow environments.</p>

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