Biotite Mineral | Uses and Properties - Geology.com
Biotite is a rock-forming mineral found in a wide range of crystalline igneous rocks such as granite, diorite, gabbro, peridotite, and pegmatite. It also forms under metamorphic conditions when argillaceous rocks are exposed to heat and pressure to form schist and gneiss.
Characterization of biotite and amphibole compositions in …
2022年4月2日 · This study primarily shows that specific parameters of biotite composition are recognizably different between granite types and that biotite composition can be used to further characterize S-, I-, or A-type granites. However, a note of caution is required when analyzing the composition of biotite and placing it within a granite type.
Biotite - Wikipedia
Members of the biotite group are found in a wide variety of igneous and metamorphic rocks. For instance, biotite occurs in the lava of Mount Vesuvius and in the Monzoni intrusive complex of the western Dolomites. Biotite in granite tends to be poorer in magnesium than the biotite found in its volcanic equivalent, rhyolite. [16]
Petrogenesis and oxidation state of biotite granite, and …
2024年4月1日 · In this study, we present data from whole-rock geochemistry and zircon U-Pb ages, trace elements and Hf-O isotopes of the ore-related granites, as well as cassiterite U-Pb ages for the Debao deposit. We discuss the petrogenesis and oxidation state of the granitic magmatism that formed the coupled Cu-Sn mineralization. Fig. 1.
Petrogenesis of biotite granite with transitional I-A-type affinities ...
2021年9月1日 · In this contribution, the ca. 91 Ma Bozhushan biotite granites in the southwestern Cathaysia Block, China, are characterized by high abundance of high-field-strength elements (HFSEs), with Zr + Nb + Ce + Y > 350 ppm and 10000*Ga/Al > …
Petrogenesis of magmatic charnockite-biotite granite suite from …
In this study, we present for the first time a detailed description of the lithology, petrography, mineralogy, and geochemistry of a magmatic charnockite –biotite granite association from the granulite terrane of the Chotanagpur Granite Gneissic Complex (CGGC) of the east Indian shield.
黑云母花岗岩 - 百度百科
此图为中国连平铁屎坪的黑云母花岗岩（Biotite granite）的标本照片，现收藏于 中国地质博物馆。 黑云母花岗岩为岩体呈浅肉红色。 岩石由钾长石、 斜长石 、石英、黑云母组成。 副矿物有磁铁矿、榍石、锆石、磷灰石等。 岩体侵入于南园组，发育有高岭土化，为燕山早期的产物，并因受挤压具较强烈 片麻状构造。 岩体中有较多的闪长岩类包体。 黑云母花岗岩属于非金属矿石，灰白色，花岗结构，块状构造。 主要矿物组成为石英、长石、黑云母、角闪石。 此图为中国连平铁 …
In granites, the most common ferromagnesian phases are biotite and amphibole, which raises the question as to what compositional domains are present among these phases and how do those domains relate to granite composition. Here we present a char-acterization of biotite and amphibole compositions from S-, I-, and A-type granites.
Geochemical characteristics and geological significance of biotite …
The comprehensive research results indicate that the two-mica granite and syenogranite in the Dahongliutan area are products of crustal source material re-melting, exhibiting typical characteristics of strongly peraluminous S-type granite. In contrast, the biotite granite is an Ⅰ-type granite formed by the involvement of mantle source material.
Biotite Group – WGNHS – UW–Madison
Biotite refers to a group of common rock-forming minerals forming a series between phlogopite and annite. The name is best used as a field name for dark micas for which the exact composition has not been determined. It is found in a variety of occurrences. It occurs in plutonic igneous rocks ranging from granites to gabbronorite to syenites.
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