Journal of Earth System Science ( IF 1.9 ) Pub Date : 2021-02-03 , DOI: 10.1007/s12040-020-01517-7 Naveen Kumar , Naresh Kumar , Radhika Sharma , A Krishnakanta Singh
Abstract
The present study is carried out to understand the factors controlling halogens present in biotites, role of halogens in metallogeny in context to the magmatic evolution of Tusham Ring Complex (TRC), NW Indian Shield. The investigated rocks are identified with hypersolvus, high-K calc-alkaline, peraluminous, ferroan-enriched and typical A-type granitoids affinity. They are enriched in SiO2, Na2O + K2O, REEs (except Eu), LILE + HFSE, elevated in Fe/Mg, Ga/Al, Th/U, A/CNK ratio and depleted in CaO, MgO, Sr, Cr, Ni, P, Ti, V and Eu abundances. The sequential accumulation of incompatible trace elements (LILE, HFSE, REEs and others) in studied rocks overlaps almost entirely the range of rare metal granitoids and high heat-producing granitoids. The elemental geochemistry in conjunction with high abundances of F (0.80–7.11 wt%) and Cl (0.44–1.56 wt%) in biotite mineral collectively attribute to hydrothermal fluid activity and the subsequent mineralization around TRC region. Our new results suggest that the acidic magmatism that occurred in the TRC is considered as a part of the plume-related Neoproterozoic Malani Igneous Suite (MIS) anorogenic magmatism.
Highlights
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1.
The bulk geochemistry data and the high concentration of fluorine (0.80–7.11 wt%) and chlorine (0.44–1.56 wt %) in biotite mineral indicate halogen enriched magmatic source.
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2.
The halogen enriched magma is an important key to understand the magmatic evolution and metallogeny of Tusham Ring Complex.
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3.
The high concentration of rare metal, rare earth metals and radioactive elements suggests that the investigated granitoids are rare metal granitoids with high heat producing capacity.
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4.
The acid volcano-plutonic rocks of Tusham Ring Complex are important barcodes to reconstruct the Neoproterozoic Rodinia supercontinent and related tecto-magmatic activities occurred in NW Indian shield.
中文翻译：
印度西北部Tusham Ring Complex含氟和氯的黑云母的地球化学特征：卤素分布和地球动力学演化的约束
摘要
进行本研究是为了了解控制黑云母中存在的卤素的因素，卤素在成矿作用下与西北印度盾构Tusham Ring Complex（TRC）岩浆演化的关系。所研究的岩石具有超溶质，高K钙碱性，高铝质，富铁铁质和典型的A型花岗岩类亲和力。它们富含SiO 2，Na 2 O + K 2O，REE（Eu除外），LILE + HFSE，Fe / Mg，Ga / Al，Th / U，A / CNK比升高且CaO，MgO，Sr，Cr，Ni，P，Ti，V和Eu贫化丰富。在研究的岩石中不相容微量元素（LILE，HFSE，REEs和其他元素）的顺序堆积几乎完全重叠了稀有金属花岗岩和高产热量花岗岩的范围。黑云母矿物中的元素地球化学与高丰度的F（0.80–7.11 wt％）和Cl（0.44–1.56 wt％）共同归因于热液活动和随后在TRC区域附近的矿化。我们的新结果表明，在TRC中发生的酸性岩浆作用被认为是与羽流有关的新元古代Malani火成岩（MIS）产源岩浆作用的一部分。
强调
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1。
大量的地球化学数据以及黑云母矿物中的氟（0.80–7.11 wt％）和氯（0.44–1.56 wt％）的高浓度表明富含卤素的岩浆源。
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富含卤素的岩浆是了解Tusham Ring Complex的岩浆演化和成矿作用的重要关键。
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3。
高浓度的稀有金属，稀土金属和放射性元素表明所研究的类花岗岩是具有高发热能力的稀有金属类花岗岩。
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4。
Tusham Ring Complex的酸性火山-古生岩是重建新元古代罗迪尼亚超大陆及其在西北印度盾构发生的相关构造岩浆活动的重要条形码。
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