Rongxuka Li deposit, Yajiang County, Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Sichuan, Chinai

Regional Level Types
Rongxuka Li deposit	Deposit
Yajiang County	County
Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture)	Prefecture
Sichuan	Province
China	Country

This page is currently not sponsored. Click here to sponsor this page.

PhotosMapsSearchMineralogy

The dome core is mainly composed of the Late Triassic Zhuwo Formation (T3zw), consisting of rhythmically interbedded hornfelsed fine-grained quartz sandstone and garnet–staurolite–quartz–biotite schist. Surrounding the core, the Xinduqiao Formation (T3xd) crops out and includes Member 1 (T3xd1) and Member 2 (T3xd2). Member 1 is subdivided into sub-members a and b: sub-member a is dominated by garnet–staurolite–biotite–quartz schist with minor garnet–chlorite–biotite schist, whereas sub-member b mainly comprises garnet–andalusite–biotite–quartz schist, andalusite–garnet–biotite schist, and garnet–chlorite–andalusite–quartz–biotite schist. Member 2 consists predominantly of biotite schist. Bedding attitudes are gentle in the dome core and become progressively steeper outward. A total of 192 pegmatite dikes have been identified within the Rongxuka dome, 47 of which are confirmed to be mineralized, accounting for 24.4 % of the total population. The core of the dome (T3zw) hosts relatively few pegmatites, most of which are barren. In contrast, the majority of the pegmatite dikes, along with the diorite bodies, intrude into the T3xd1-b formation. Most LCT pegmatite dikes are 20–500 m long and 1–5 m thick. The largest mineralized body, the No. 1 dike, reaches ∼ 1903 m in length and exhibits well-developed swelling–pinching structures. In the No. 6 dike the internal structure can be broadly divided from margin to center into four zones with gradational boundaries. (I) A fine-grained marginal zone (0.2–0.5 m thick) occurs along the contact with the country rock and consists mainly of albite, quartz, and muscovite, with minor biotite and occasional schorl. (II) A medium- to fine-grained intermediate zone (typically 1–5 m wide) forms the main body of the pegmatite and is characterized by albite, quartz, and spodumene, with subordinate muscovite. (III) A coarse-grained central zone shows variable thickness and consists predominantly of albite and quartz, with minor spodumene and muscovite. (IV) Discontinuous quartz- and feldspar-rich lenses occur locally in the central to upper parts of the dike; quartz-rich domains generally lack spodumene, whereas feldspar-rich lenses may host coarse spodumene.

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

15 valid minerals.

Rock Types Recorded